diff --git a/gtk2_ardour/add_route_dialog.cc b/gtk2_ardour/add_route_dialog.cc
index 308aca58f5..71fa844658 100644
--- a/gtk2_ardour/add_route_dialog.cc
+++ b/gtk2_ardour/add_route_dialog.cc
@@ -617,7 +617,7 @@ AddRouteDialog::maybe_update_name_template_entry ()
 		name_template_entry.set_text (VCA::default_name_template());
 		break;
 	}
-	/* ignore programatic change, restore false */
+	/* ignore programmatic change, restore false */
 	reset_name_edited ();
 }
 
diff --git a/gtk2_ardour/ambiguous_file_dialog.cc b/gtk2_ardour/ambiguous_file_dialog.cc
index 1693da12a5..4790ad8cd4 100644
--- a/gtk2_ardour/ambiguous_file_dialog.cc
+++ b/gtk2_ardour/ambiguous_file_dialog.cc
@@ -29,7 +29,7 @@ using namespace Gtk;
 AmbiguousFileDialog::AmbiguousFileDialog (const string& file, const vector<string>& paths)
 	: ArdourDialog (_("Ambiguous File"), true, false)
 {
-	/* This dialog is always shown programatically. Center the window.*/
+	/* This dialog is always shown programmatically. Center the window.*/
 	set_position (Gtk::WIN_POS_CENTER);
 
 	get_vbox()->set_spacing (6);
diff --git a/gtk2_ardour/ardour_ui_keys.cc b/gtk2_ardour/ardour_ui_keys.cc
index 53760fd432..dbfdb6faf5 100644
--- a/gtk2_ardour/ardour_ui_keys.cc
+++ b/gtk2_ardour/ardour_ui_keys.cc
@@ -194,7 +194,7 @@ ARDOUR_UI::key_press_focus_accelerator_handler (Gtk::Window& window, GdkEventKey
 
 		KeyboardKey k (ev->state, ev->keyval);
 
-		/* Check heirarchy from current focus widget upwards */
+		/* Check hierarchy from current focus widget upwards */
 
 		while (focus) {
 
diff --git a/gtk2_ardour/ardour_ui_session.cc b/gtk2_ardour/ardour_ui_session.cc
index 804ba8a35a..af039d205b 100644
--- a/gtk2_ardour/ardour_ui_session.cc
+++ b/gtk2_ardour/ardour_ui_session.cc
@@ -314,7 +314,7 @@ ARDOUR_UI::load_session (const std::string& path, const std::string& snap_name,
 	/* load_session calls flush_pending() which allows
 	 * GUI interaction and potentially loading another session
 	 * (that was easy via snapshot sidebar).
-	 * Recursing into load_session() from load_session() and recusive
+	 * Recursing into load_session() from load_session() and recursive
 	 * event loops causes all kind of crashes.
 	 */
 	assert (!session_load_in_progress);
diff --git a/gtk2_ardour/audio_region_view.cc b/gtk2_ardour/audio_region_view.cc
index a902b253c6..cb1b612f67 100644
--- a/gtk2_ardour/audio_region_view.cc
+++ b/gtk2_ardour/audio_region_view.cc
@@ -1747,7 +1747,7 @@ AudioRegionView::transients_changed ()
 void
 AudioRegionView::update_transient(float /*old_pos*/, float new_pos)
 {
-	/* Find sample at old pos, calulate new sample then update region transients*/
+	/* Find sample at old pos, calculate new sample then update region transients*/
 	list<std::pair<samplepos_t, ArdourCanvas::Line*> >::iterator l;
 
 	for (l = feature_lines.begin(); l != feature_lines.end(); ++l) {
@@ -1772,7 +1772,7 @@ AudioRegionView::remove_transient (float pos)
 	/* this is called from Editor::remove_transient () with pos == get_data ("position")
 	 * which is the item's x-coordinate inside the ARV.
 	 *
-	 * Find sample at old pos, calulate new sample then update region transients
+	 * Find sample at old pos, calculate new sample then update region transients
 	 */
 	list<std::pair<samplepos_t, ArdourCanvas::Line*> >::iterator l;
 
@@ -1816,7 +1816,7 @@ AudioRegionView::drag_end ()
 	//see comment for drag_start
 
 	if (fade_in_handle && fade_in_handle->visible()) {
-		// lenght of region or fade changed, re-check
+		// length of region or fade changed, re-check
 		// if fade_in_trim_handle or fade_out_trim_handle should
 		// be visible. -- If the fade_in_handle is visible
 		// we have focus and are not in internal edit mode.
diff --git a/gtk2_ardour/automation_line.cc b/gtk2_ardour/automation_line.cc
index 5758e411c3..a90855c20a 100644
--- a/gtk2_ardour/automation_line.cc
+++ b/gtk2_ardour/automation_line.cc
@@ -549,7 +549,7 @@ AutomationLine::ContiguousControlPoints::clamp_dx (double dx)
 
 	tx = cp->get_x() + dx; // new possible position if we just add the motion
 	tx = max (tx, before_x); // can't move later than following point
-	tx = min (tx, after_x);  // can't move earlier than preceeding point
+	tx = min (tx, after_x);  // can't move earlier than preceding point
 	return  tx - cp->get_x ();
 }
 
@@ -1098,7 +1098,7 @@ AutomationLine::reset ()
 		return;
 	}
 
-	/* TODO: abort any drags in progress, e.g. draging points while writing automation
+	/* TODO: abort any drags in progress, e.g. dragging points while writing automation
 	 * (the control-point model, used by AutomationLine::drag_motion, will be invalid).
 	 *
 	 * Note: reset() may also be called from an aborted drag (LineDrag::aborted)
diff --git a/gtk2_ardour/beatbox_gui.cc b/gtk2_ardour/beatbox_gui.cc
index b0edcecd1e..944e671e5d 100644
--- a/gtk2_ardour/beatbox_gui.cc
+++ b/gtk2_ardour/beatbox_gui.cc
@@ -142,7 +142,7 @@ BBGUI::SwitchRow::switch_event (GdkEvent* ev, int col)
 	Switch* s = switches[col];
 
 	if (ev->type == GDK_BUTTON_PRESS) {
-		/* XXX changes hould be driven by model */
+		/* XXX changes should be driven by model */
 		if (s->button->value()) {
 			owner.bbox->remove_note (note, at);
 			s->button->set_value (0);
@@ -211,7 +211,7 @@ BBGUI::sequencer_changed (PropertyChange const &)
 
 	vertical_adjustment.set_upper (required_scroll);
 
-	/* height is 1 step_dimen larger to accomodate the "step indicator"
+	/* height is 1 step_dimen larger to accommodate the "step indicator"
 	 * line at the top
 	 */
 
diff --git a/gtk2_ardour/editor.cc b/gtk2_ardour/editor.cc
index 87d70bf96b..e4ab55365b 100644
--- a/gtk2_ardour/editor.cc
+++ b/gtk2_ardour/editor.cc
@@ -244,7 +244,7 @@ static const gchar *_rb_opt_strings[] = {
 };
 #endif
 
-/* Robin says: this should be odd to accomodate cairo drawing offset (width/2 rounds up to pixel boundary) */
+/* Robin says: this should be odd to accommodate cairo drawing offset (width/2 rounds up to pixel boundary) */
 #ifdef __APPLE__
 #define COMBO_TRIANGLE_WIDTH 19 // ArdourButton _diameter (11) + 2 * arrow-padding (2*2) + 2 * text-padding (2*5)
 #else
diff --git a/gtk2_ardour/editor_canvas.cc b/gtk2_ardour/editor_canvas.cc
index 359b7d5526..1a59859ddd 100644
--- a/gtk2_ardour/editor_canvas.cc
+++ b/gtk2_ardour/editor_canvas.cc
@@ -1324,7 +1324,7 @@ Editor::which_canvas_cursor(ItemType type) const
 		/* We don't choose a cursor for these items on top of a region view,
 		   because this would push a new context on the enter stack which
 		   means switching the region context for things like smart mode
-		   won't actualy change the cursor. */
+		   won't actually change the cursor. */
 		// case WaveItem:
 		case StreamItem:
 		case AutomationTrackItem:
diff --git a/gtk2_ardour/editor_canvas_events.cc b/gtk2_ardour/editor_canvas_events.cc
index 26cf9dd45d..1660c8e79a 100644
--- a/gtk2_ardour/editor_canvas_events.cc
+++ b/gtk2_ardour/editor_canvas_events.cc
@@ -876,7 +876,7 @@ Editor::canvas_region_view_name_highlight_event (GdkEvent* event, ArdourCanvas::
 		break;
 	case GDK_MOTION_NOTIFY:
 		motion_handler (item, event);
-		ret = true; // force this to avoid progagating the event into the regionview
+		ret = true; // force this to avoid propagating the event into the regionview
 		break;
 	case GDK_ENTER_NOTIFY:
 		ret = enter_handler (item, event, RegionViewNameHighlight);
diff --git a/gtk2_ardour/editor_drag.cc b/gtk2_ardour/editor_drag.cc
index c60dc3db4a..93f2bd0f3e 100644
--- a/gtk2_ardour/editor_drag.cc
+++ b/gtk2_ardour/editor_drag.cc
@@ -1479,7 +1479,7 @@ RegionMotionDrag::motion (GdkEvent* event, bool first_move)
 				 * the current position can be calculated as follows:
 				 */
 				// a well placed oofus attack can still throw this off.
-				// likley auto-scroll related, printf() debugging may tell, commented out for now.
+				// likely auto-scroll related, printf() debugging may tell, commented out for now.
 				//assert (current_pointer_time_axis_view == _time_axis_views.size() - dtz + _ddropzone + delta_time_axis_view);
 			}
 		} else {
@@ -2377,7 +2377,7 @@ RegionRippleDrag::RegionRippleDrag (Editor* e, ArdourCanvas::Item* i, RegionView
 	RegionSelection selected_regions = _editor->get_selection().regions;
 	selection_length = selected_regions.start_time().distance (selected_regions.end_time());
 
-	// Rippling accross tracks disabled. Rippling on all tracks is the way to go in the future.
+	// Rippling across tracks disabled. Rippling on all tracks is the way to go in the future.
 	allow_moves_across_tracks = false; // (selected_regions.playlists().size() == 1);
 	prev_tav = NULL;
 
diff --git a/gtk2_ardour/editor_drag.h b/gtk2_ardour/editor_drag.h
index bce6d88b57..769a6103de 100644
--- a/gtk2_ardour/editor_drag.h
+++ b/gtk2_ardour/editor_drag.h
@@ -1224,7 +1224,7 @@ private:
 	MidiRegionView* _region_view;
 };
 
-/** A RubberbandSelectDrag for selecting MIDI notes but with no horizonal component */
+/** A RubberbandSelectDrag for selecting MIDI notes but with no horizontal component */
 class MidiVerticalSelectDrag : public RubberbandSelectDrag
 {
 public:
diff --git a/gtk2_ardour/editor_markers.cc b/gtk2_ardour/editor_markers.cc
index 8751267e11..10bfa299c6 100644
--- a/gtk2_ardour/editor_markers.cc
+++ b/gtk2_ardour/editor_markers.cc
@@ -1599,7 +1599,7 @@ Editor::marker_menu_remove ()
 	}
 }
 
-/* actally just resets the ts to constant using initial tempo */
+/* actually just resets the ts to constant using initial tempo */
 void
 Editor::toggle_tempo_type ()
 {
diff --git a/gtk2_ardour/editor_mixer.cc b/gtk2_ardour/editor_mixer.cc
index 19d26dc9b7..b843e7994e 100644
--- a/gtk2_ardour/editor_mixer.cc
+++ b/gtk2_ardour/editor_mixer.cc
@@ -206,7 +206,7 @@ Editor::set_selected_mixer_strip (TimeAxisView& view)
 		return;
 	}
 
-	// if this is an automation track, then we shold the mixer strip should
+	// if this is an automation track, then the mixer strip should
 	// show the parent
 
 	boost::shared_ptr<ARDOUR::Stripable> stripable;
diff --git a/gtk2_ardour/editor_mouse.cc b/gtk2_ardour/editor_mouse.cc
index baeae27bce..09edd83a4d 100644
--- a/gtk2_ardour/editor_mouse.cc
+++ b/gtk2_ardour/editor_mouse.cc
@@ -358,7 +358,7 @@ Editor::mouse_mode_toggled (MouseMode m)
 	instant_save ();
 
 	/* this should generate a new enter event which will
-	   trigger the appropiate cursor.
+	   trigger the appropriate cursor.
 	*/
 
 	if (_track_canvas) {
@@ -2470,7 +2470,7 @@ Editor::point_trim (GdkEvent* event, timepos_t const & new_bound)
 {
 	RegionView* rv = clicked_regionview;
 
-	/* Choose action dependant on which button was pressed */
+	/* Choose action dependent on which button was pressed */
 	switch (event->button.button) {
 	case 1:
 		begin_reversible_command (_("start point trim"));
diff --git a/gtk2_ardour/editor_ops.cc b/gtk2_ardour/editor_ops.cc
index 6d32897119..b4223327ca 100644
--- a/gtk2_ardour/editor_ops.cc
+++ b/gtk2_ardour/editor_ops.cc
@@ -216,7 +216,7 @@ Editor::split_regions_at (timepos_t const & where, RegionSelection& regions)
 
 	if (regions.size() == 1) {
 		/* TODO:  if splitting a single region, and snap-to is using
-		 region boundaries, mabye we shouldn't pay attention to them? */
+		 region boundaries, maybe we shouldn't pay attention to them? */
 	} else {
 		frozen = true;
 		EditorFreeze(); /* Emit Signal */
@@ -7374,7 +7374,7 @@ Editor::split_region_at_points (boost::shared_ptr<Region> r, AnalysisFeatureList
 
 	while (x != positions.end()) {
 
-		/* deal with positons that are out of scope of present region bounds */
+		/* deal with positions that are out of scope of present region bounds */
 
 		if (*x < start_sample || *x >= end_sample) {
 			++x;
@@ -7414,7 +7414,7 @@ Editor::split_region_at_points (boost::shared_ptr<Region> r, AnalysisFeatureList
 		// TODO set transients_offset
 
 		boost::shared_ptr<Region> nr = RegionFactory::create (r->sources(), plist, false);
-		/* because we set annouce to false, manually add the new region to the
+		/* because we set announce to false, manually add the new region to the
 		 * RegionFactory map
 		 */
 		RegionFactory::map_add (nr);
@@ -7442,7 +7442,7 @@ Editor::split_region_at_points (boost::shared_ptr<Region> r, AnalysisFeatureList
 	plist.add (ARDOUR::Properties::layer, 0);
 
 	boost::shared_ptr<Region> nr = RegionFactory::create (r->sources(), plist, false);
-	/* because we set annouce to false, manually add the new region to the
+	/* because we set announce to false, manually add the new region to the
 	   RegionFactory map
 	*/
 	RegionFactory::map_add (nr);
diff --git a/gtk2_ardour/editor_sources.cc b/gtk2_ardour/editor_sources.cc
index be8b4fc50d..bce3705f7f 100644
--- a/gtk2_ardour/editor_sources.cc
+++ b/gtk2_ardour/editor_sources.cc
@@ -86,7 +86,7 @@ EditorSources::init ()
 
 	setup_col (append_col (_columns.channels, "Chans    "), 1, ALIGN_LEFT, _("# Ch"), _("# Channels in the region"));
 	setup_col (append_col (_columns.captd_for, date_width), 17, ALIGN_LEFT, _("Captured For"), _("Original Track this was recorded on"));
-	setup_col (append_col (_columns.captd_xruns, "1234567890"), 21, ALIGN_RIGHT, _("# Xruns"), _("Number of dropouts that occured during recording"));
+	setup_col (append_col (_columns.captd_xruns, "1234567890"), 21, ALIGN_RIGHT, _("# Xruns"), _("Number of dropouts that occurred during recording"));
 
 	add_tag_column ();
 
diff --git a/gtk2_ardour/editor_summary.cc b/gtk2_ardour/editor_summary.cc
index d1dd5f0f99..85eb1c34bd 100644
--- a/gtk2_ardour/editor_summary.cc
+++ b/gtk2_ardour/editor_summary.cc
@@ -653,7 +653,7 @@ EditorSummary::summary_zoom_step (int steps /* positive steps to zoom "out" , ne
 
 	/* for now, disallow really close zooming-in from the scroomer. (Currently it
 	 * causes the start-offset to 'walk' because of integer limitations.
-	 * To fix this, probably need to maintain float throught the get/set_editor() path.)
+	 * To fix this, probably need to maintain float through the get/set_editor() path.)
 	 */
 	if (steps<0) {
       if ((xn.second - xn.first) < 2)
diff --git a/gtk2_ardour/engine_dialog.cc b/gtk2_ardour/engine_dialog.cc
index 32b5c8955f..b0d09d5351 100644
--- a/gtk2_ardour/engine_dialog.cc
+++ b/gtk2_ardour/engine_dialog.cc
@@ -650,7 +650,7 @@ EngineControl::build_full_control_notebook ()
 		++row;
 	}
 
-	/* Prefere next available vertical slot, 1 row */
+	/* Prefer next available vertical slot, 1 row */
 	if (btn < row && !autostart_packed) {
 		basic_packer.attach (try_autostart_button, 3, 4, btn, btn + 1, xopt, xopt);
 		btn++;
diff --git a/gtk2_ardour/export_format_dialog.cc b/gtk2_ardour/export_format_dialog.cc
index ec765b80b1..bae19f4cf4 100644
--- a/gtk2_ardour/export_format_dialog.cc
+++ b/gtk2_ardour/export_format_dialog.cc
@@ -646,7 +646,7 @@ ExportFormatDialog::init_format_table ()
 	src_quality_combo.pack_start (src_quality_cols.label);
 	src_quality_combo.set_active (0);
 
-	/* Demo Noise Optoins */
+	/* Demo Noise Options */
 
 	demo_noise_list = Gtk::ListStore::create (demo_noise_cols);
 	demo_noise_combo.set_model (demo_noise_list);
diff --git a/gtk2_ardour/export_format_selector.h b/gtk2_ardour/export_format_selector.h
index 6533fd78f8..ffdeb29498 100644
--- a/gtk2_ardour/export_format_selector.h
+++ b/gtk2_ardour/export_format_selector.h
@@ -74,7 +74,7 @@ private:
 
 	ARDOUR::ExportProfileManager::FormatStatePtr state;
 
-	/*** GUI componenets ***/
+	/*** GUI components ***/
 
 	struct FormatCols : public Gtk::TreeModelColumnRecord
 	{
diff --git a/gtk2_ardour/gui_object.h b/gtk2_ardour/gui_object.h
index 0efa330a11..f80e19ae8f 100644
--- a/gtk2_ardour/gui_object.h
+++ b/gtk2_ardour/gui_object.h
@@ -41,7 +41,7 @@ public:
 	/** Get a string from our state.
 	 *  @param id property of Object node to look for.
 	 *  @param prop_name name of the Object property to return.
-	 *  @param empty if non-0, filled in with true if the property is currently non-existant, otherwise false.
+	 *  @param empty if non-0, filled in with true if the property is currently non-existent, otherwise false.
 	 *  @return value of property `prop_name', or empty.
 	 */
 	std::string get_string (const std::string& id, const std::string& prop_name, bool* empty = 0);
diff --git a/gtk2_ardour/io_button.cc b/gtk2_ardour/io_button.cc
index 16d23c02b4..3102858815 100644
--- a/gtk2_ardour/io_button.cc
+++ b/gtk2_ardour/io_button.cc
@@ -269,7 +269,7 @@ IOButton::button_press (GdkEventButton* ev)
 			}
 		}
 
-		/* then all other bundles, including physical outs or other sofware */
+		/* then all other bundles, including physical outs or other software */
 		for (ARDOUR::BundleList::iterator i = b->begin (); i != b->end (); ++i) {
 			if (boost::dynamic_pointer_cast<UserBundle> (*i) == 0) {
 				maybe_add_bundle_to_menu (*i, current, intended_type);
diff --git a/gtk2_ardour/keyboard.cc b/gtk2_ardour/keyboard.cc
index 3f06417c01..2ae634cbad 100644
--- a/gtk2_ardour/keyboard.cc
+++ b/gtk2_ardour/keyboard.cc
@@ -110,7 +110,7 @@ ArdourKeyboard::setup_keybindings ()
 
 	string lowercase_program_name = downcase (string(PROGRAM_NAME));
 
-	/* extract and append minor vesion */
+	/* extract and append minor version */
 	std::string rev (revision);
 	std::size_t pos = rev.find_first_of("-");
 	if (pos != string::npos && pos > 0) {
diff --git a/gtk2_ardour/lv2_external_ui.h b/gtk2_ardour/lv2_external_ui.h
index a7fb45bdd2..2b0d0e5344 100644
--- a/gtk2_ardour/lv2_external_ui.h
+++ b/gtk2_ardour/lv2_external_ui.h
@@ -53,7 +53,7 @@ extern "C" {
 struct lv2_external_ui
 {
   /**
-   * Host calls this function regulary. UI library implementing the
+   * Host calls this function regularly. UI library implementing the
    * callback may do IPC or redraw the UI.
    *
    * @param _this_ the UI context
@@ -87,7 +87,7 @@ struct lv2_external_ui_host
   /**
    * Callback that plugin UI will call
    * when UI (GUI window) is closed by user.
-   * This callback wil; be called during execution of lv2_external_ui::run()
+   * This callback will be called during execution of lv2_external_ui::run()
    * (i.e. not from background thread).
    *
    * After this callback is called, UI is defunct. Host must call
diff --git a/gtk2_ardour/midi_channel_selector.cc b/gtk2_ardour/midi_channel_selector.cc
index 2f4f864933..58ef463281 100644
--- a/gtk2_ardour/midi_channel_selector.cc
+++ b/gtk2_ardour/midi_channel_selector.cc
@@ -749,7 +749,7 @@ MidiChannelSelectorWindow::capture_mode_changed ()
 		}
 	}
 
-	capture_mask_changed (); // udpate buttons
+	capture_mask_changed (); // update buttons
 
 	last_drawn_capture_mode = mode;
 }
diff --git a/gtk2_ardour/midi_time_axis.cc b/gtk2_ardour/midi_time_axis.cc
index 2a001bf962..69e9b46909 100644
--- a/gtk2_ardour/midi_time_axis.cc
+++ b/gtk2_ardour/midi_time_axis.cc
@@ -1217,7 +1217,7 @@ MidiTimeAxisView::show_all_automation (bool apply_to_selection)
 
 		md.set_title (_("Show All Automation"));
 
-		md.set_secondary_text (_("There are a total of 16 MIDI channels times 128 Control-Change parameters, not including other MIDI controls. Showing all will add more than 2000 automation lanes which is not generally useful. This will take some time and also slow down the GUI signficantly."));
+		md.set_secondary_text (_("There are a total of 16 MIDI channels times 128 Control-Change parameters, not including other MIDI controls. Showing all will add more than 2000 automation lanes which is not generally useful. This will take some time and also slow down the GUI significantly."));
 		if (md.run () != RESPONSE_YES) {
 			return;
 		}
diff --git a/gtk2_ardour/midi_tracer.cc b/gtk2_ardour/midi_tracer.cc
index 850f77d0c3..c87c923d64 100644
--- a/gtk2_ardour/midi_tracer.cc
+++ b/gtk2_ardour/midi_tracer.cc
@@ -176,13 +176,13 @@ MidiTracer::port_changed ()
 		return;
 	}
 
-	/* The inheritance heirarchy makes this messy. AsyncMIDIPort has two
+	/* The inheritance hierarchy makes this messy. AsyncMIDIPort has two
 	 * available MIDI::Parsers what we could connect to, ::self_parser()
 	 * (from ARDOUR::MidiPort) and ::parser() from MIDI::Port. One day,
 	 * this mess will all go away ...
 	 */
 
-	/* Some ports have a parser avaiable (Transport Masters and ASYNC ports)
+	/* Some ports have a parser available (Transport Masters and ASYNC ports)
 	 * and some do not. If the port has a parser already, just attach to it.
 	 * If not use our local parser and tell the port that we need it to be called.
 	 */
diff --git a/gtk2_ardour/missing_file_dialog.cc b/gtk2_ardour/missing_file_dialog.cc
index 2c9daffab8..e5b83b4ac7 100644
--- a/gtk2_ardour/missing_file_dialog.cc
+++ b/gtk2_ardour/missing_file_dialog.cc
@@ -47,7 +47,7 @@ MissingFileDialog::MissingFileDialog (Gtk::Window& parent, Session* s, const std
 	, all_missing_ok (choice_group, _("Skip all missing files"), false)
 	, this_missing_ok (choice_group, _("Skip this file"), false)
 {
-	/* This dialog is always shown programatically. Center the window.*/
+	/* This dialog is always shown programmatically. Center the window.*/
 	set_position (Gtk::WIN_POS_CENTER);
 
 	set_session (s);
diff --git a/gtk2_ardour/missing_filesource_dialog.cc b/gtk2_ardour/missing_filesource_dialog.cc
index 67b592a879..cb98875216 100644
--- a/gtk2_ardour/missing_filesource_dialog.cc
+++ b/gtk2_ardour/missing_filesource_dialog.cc
@@ -32,7 +32,7 @@ using namespace PBD;
 MissingFileSourceDialog::MissingFileSourceDialog (Gtk::Window& parent, Session* s, list<string> const& files, DataType dt)
 	: ArdourDialog (parent, _("Missing Source Files"), true, false)
 {
-	/* This dialog is always shown programatically. Center the window.*/
+	/* This dialog is always shown programmatically. Center the window.*/
 	set_position (Gtk::WIN_POS_CENTER);
 
 	set_session (s);
diff --git a/gtk2_ardour/missing_plugin_dialog.cc b/gtk2_ardour/missing_plugin_dialog.cc
index bde54c66f3..2c28305de3 100644
--- a/gtk2_ardour/missing_plugin_dialog.cc
+++ b/gtk2_ardour/missing_plugin_dialog.cc
@@ -34,7 +34,7 @@ using namespace PBD;
 MissingPluginDialog::MissingPluginDialog (Gtk::Window& parent, Session* s, list<string> const & plugins, bool cache_valid)
 	: ArdourDialog (parent, _("Missing Plugins"), true, false)
 {
-	/* This dialog is always shown programatically. Center the window.*/
+	/* This dialog is always shown programmatically. Center the window.*/
 	set_position (Gtk::WIN_POS_CENTER);
 
 	set_session (s);
diff --git a/gtk2_ardour/mixer_strip.cc b/gtk2_ardour/mixer_strip.cc
index c2a745a480..26f5d4b2d1 100644
--- a/gtk2_ardour/mixer_strip.cc
+++ b/gtk2_ardour/mixer_strip.cc
@@ -2081,7 +2081,7 @@ MixerStrip::update_track_number_visibility ()
 		number_label.show ();
 		// see ArdourButton::on_size_request(), we should probably use a global size-group here instead.
 		// except the width of the number label is subtracted from the name-hbox, so we
-		// need to explictly calculate it anyway until the name-label & entry become ArdourWidgets.
+		// need to explicitly calculate it anyway until the name-label & entry become ArdourWidgets.
 		int tnw = (2 + std::max(2u, _session->track_number_decimals())) * number_label.char_pixel_width();
 		if (tnw & 1) --tnw;
 		number_label.set_size_request(tnw, -1);
diff --git a/gtk2_ardour/mixer_ui.cc b/gtk2_ardour/mixer_ui.cc
index 53bffa8131..c062beb046 100644
--- a/gtk2_ardour/mixer_ui.cc
+++ b/gtk2_ardour/mixer_ui.cc
@@ -3872,7 +3872,7 @@ Mixer_UI::screenshot (std::string const& filename)
 	Glib::RefPtr<Gdk::Pixbuf> pb = osw.get_pixbuf ();
 	pb->save (filename, "png");
 
-	/* unpack elements before destorying the Box & OffscreenWindow */
+	/* unpack elements before destroying the Box & OffscreenWindow */
 	list<Gtk::Widget*> children = b.get_children();
 	for (list<Gtk::Widget*>::iterator child = children.begin(); child != children.end(); ++child) {
 		b.remove (**child);
diff --git a/gtk2_ardour/mono_panner.cc b/gtk2_ardour/mono_panner.cc
index fb01fb53b3..fa5e69ea2a 100644
--- a/gtk2_ardour/mono_panner.cc
+++ b/gtk2_ardour/mono_panner.cc
@@ -113,7 +113,7 @@ MonoPanner::set_tooltip ()
 		 This is expressed as a pair of percentage values that ranges from (100,0)
 		 (hard left) through (50,50) (hard center) to (0,100) (hard right).
 
-		 This is pretty wierd, but its the way audio engineers expect it. Just remember that
+		 This is pretty weird, but its the way audio engineers expect it. Just remember that
 		 the center of the USA isn't Kansas, its (50LA, 50NY) and it will all make sense.
 		 */
 
diff --git a/gtk2_ardour/nag.cc b/gtk2_ardour/nag.cc
index 6f067f10d3..e25e04c7be 100644
--- a/gtk2_ardour/nag.cc
+++ b/gtk2_ardour/nag.cc
@@ -167,7 +167,7 @@ NagScreen::is_subscribed (bool& really)
 	really = false;
 
 	/* what we'd really like here is a way to query paypal
-	   for someone's subscription status. thats a bit complicated
+	   for someone's subscription status. that's a bit complicated
 	   so for now, just see if they ever told us they were
 	   subscribed. we try to trust our users :)
 	*/
diff --git a/gtk2_ardour/new_user_wizard.cc b/gtk2_ardour/new_user_wizard.cc
index 5480c0c928..463d46f9c0 100644
--- a/gtk2_ardour/new_user_wizard.cc
+++ b/gtk2_ardour/new_user_wizard.cc
@@ -503,7 +503,7 @@ NewUserWizard::on_apply ()
 				continue;
 			}
 			/* skip sessions that are already in 'recent'.
-			 * eg. a new user changed <session-default-dir> shorly after installation
+			 * eg. a new user changed <session-default-dir> shortly after installation
 			 */
 			for (ARDOUR::RecentSessions::iterator r = rs.begin(); r != rs.end(); ++r) {
 				if ((*r).first == name) {
diff --git a/gtk2_ardour/playlist_selector.cc b/gtk2_ardour/playlist_selector.cc
index a25d97288a..aff125c0fe 100644
--- a/gtk2_ardour/playlist_selector.cc
+++ b/gtk2_ardour/playlist_selector.cc
@@ -441,7 +441,7 @@ PlaylistSelector::on_key_press_event (GdkEventKey* ev)
 			break;
 	}
 
-	/* Don't just forward the key press ... make it act as if it occured in
+	/* Don't just forward the key press ... make it act as if it occurred in
 	 * whatever the main window currently is.
 	 */
 	Gtk::Window& main_window (ARDOUR_UI::instance ()->main_window ());
diff --git a/gtk2_ardour/plugin_manager_ui.cc b/gtk2_ardour/plugin_manager_ui.cc
index d6ec964a5d..2b77654a10 100644
--- a/gtk2_ardour/plugin_manager_ui.cc
+++ b/gtk2_ardour/plugin_manager_ui.cc
@@ -50,7 +50,7 @@ using namespace ARDOUR_PLUGIN_UTILS;
 PluginManagerUI::PluginManagerUI ()
 	: ArdourWindow (_("Plugin Manager"))
 	, _btn_reindex (_("Update Index Only"))
-	, _btn_discover (_("Disover New/Updated"))
+	, _btn_discover (_("Discover New/Updated"))
 	, _btn_rescan_all (_("Re-scan All"))
 	, _btn_rescan_err (_("Re-scan Faulty"))
 	, _btn_rescan_sel (_("Re-scan Selected"))
diff --git a/gtk2_ardour/plugin_pin_dialog.cc b/gtk2_ardour/plugin_pin_dialog.cc
index 1db51ecba3..4ad93f9ed9 100644
--- a/gtk2_ardour/plugin_pin_dialog.cc
+++ b/gtk2_ardour/plugin_pin_dialog.cc
@@ -508,7 +508,7 @@ PluginPinWidget::refill_output_presets ()
 
 	PluginOutputConfiguration ppc (_pi->plugin (0)->possible_output ());
 	if (ppc.find (0) != ppc.end ()) {
-		// anyting goes
+		// anything goes
 		ppc.clear ();
 		if (n_audio != 0) {
 			ppc.insert (n_audio);
diff --git a/gtk2_ardour/plugin_setup_dialog.cc b/gtk2_ardour/plugin_setup_dialog.cc
index 92c58e323e..215c2f68fd 100644
--- a/gtk2_ardour/plugin_setup_dialog.cc
+++ b/gtk2_ardour/plugin_setup_dialog.cc
@@ -122,7 +122,7 @@ PluginSetupDialog::setup_output_presets ()
 	_out_presets.AddMenuElem (MenuElem (_("Automatic"), sigc::bind (sigc::mem_fun (*this, &PluginSetupDialog::select_output_preset), 0)));
 
 	if (ppc.find (0) != ppc.end ()) {
-		// anyting goes
+		// anything goes
 		ppc.clear ();
 		ppc.insert (1);
 		ppc.insert (2);
diff --git a/gtk2_ardour/processor_box.cc b/gtk2_ardour/processor_box.cc
index cd5c3d2a4f..df765349a6 100644
--- a/gtk2_ardour/processor_box.cc
+++ b/gtk2_ardour/processor_box.cc
@@ -1884,7 +1884,7 @@ ProcessorBox::~ProcessorBox ()
 	 * pointer to a widget owned by the UI Manager, and has potentially
 	 * be returned to many other ProcessorBoxes. GTK doesn't really make
 	 * clear the ownership of this widget, which is a menu and thus is
-	 * never packed into any container other than an implict GtkWindow.
+	 * never packed into any container other than an implicit GtkWindow.
 	 *
 	 * For now, until or if we ever get clarification over the ownership
 	 * story just let it continue to exist. At worst, its a small memory leak.
diff --git a/gtk2_ardour/rc_option_editor.cc b/gtk2_ardour/rc_option_editor.cc
index 8a0a9a7a9c..f9036ef121 100644
--- a/gtk2_ardour/rc_option_editor.cc
+++ b/gtk2_ardour/rc_option_editor.cc
@@ -2012,7 +2012,7 @@ class ColumVisibilityOption : public Option
 };
 
 
-/** A class which allows control of visibility of some editor components usign
+/** A class which allows control of visibility of some editor components using
  *  a VisibilityGroup.  The caller should pass in a `dummy' VisibilityGroup
  *  which has the correct members, but with null widget pointers.  This
  *  class allows the user to set visibility of the members, the details
diff --git a/gtk2_ardour/region_view.cc b/gtk2_ardour/region_view.cc
index 508b43ad28..4947c8d12c 100644
--- a/gtk2_ardour/region_view.cc
+++ b/gtk2_ardour/region_view.cc
@@ -592,7 +592,7 @@ RegionView::update_cue_markers ()
 		if (existing == _cue_markers.end()) {
 
 			if (c->position() < start || c->position() >= end) {
-				/* not withing this region */
+				/* not within this region */
 				continue;
 			}
 
@@ -618,7 +618,7 @@ RegionView::update_cue_markers ()
 		} else {
 
 			if (c->position() < start || c->position() >= end) {
-				/* not withing this region */
+				/* not within this region */
 				delete (*existing);
 				_cue_markers.erase (existing);
 				continue;
diff --git a/gtk2_ardour/route_group_dialog.cc b/gtk2_ardour/route_group_dialog.cc
index feca91a860..107e0d4318 100644
--- a/gtk2_ardour/route_group_dialog.cc
+++ b/gtk2_ardour/route_group_dialog.cc
@@ -229,7 +229,7 @@ RouteGroupDialog::gain_toggled ()
 	_relative.set_sensitive (_gain.get_active ());
 }
 
-/** @return true if the current group's name is unique accross the session */
+/** @return true if the current group's name is unique across the session */
 bool
 RouteGroupDialog::unique_name (std::string const name) const
 {
diff --git a/gtk2_ardour/route_time_axis.cc b/gtk2_ardour/route_time_axis.cc
index 59af49ed09..02a795b8a9 100644
--- a/gtk2_ardour/route_time_axis.cc
+++ b/gtk2_ardour/route_time_axis.cc
@@ -469,7 +469,7 @@ RouteTimeAxisView::update_track_number_visibility ()
 		}
 		// see ArdourButton::on_size_request(), we should probably use a global size-group here instead.
 		// except the width of the number label is subtracted from the name-hbox, so we
-		// need to explictly calculate it anyway until the name-label & entry become ArdourWidgets.
+		// need to explicitly calculate it anyway until the name-label & entry become ArdourWidgets.
 		int tnw = (2 + std::max(2u, _session->track_number_decimals())) * number_label.char_pixel_width();
 		if (tnw & 1) --tnw;
 		number_label.set_size_request(tnw, -1);
diff --git a/gtk2_ardour/selection.cc b/gtk2_ardour/selection.cc
index 6832cb6da3..9638696d69 100644
--- a/gtk2_ardour/selection.cc
+++ b/gtk2_ardour/selection.cc
@@ -166,7 +166,7 @@ Selection::clear_regions (bool with_signal)
 void
 Selection::clear_midi_notes (bool with_signal)
 {
-	/* Remmeber: MIDI notes are only stored here if we're using a Selection
+	/* Remember: MIDI notes are only stored here if we're using a Selection
 	   object as a cut buffer.
 	*/
 
@@ -536,7 +536,7 @@ Selection::add (boost::shared_ptr<Evoral::ControlList> cl)
 
 	/* The original may change so we must store a copy (not a pointer) here.
 	 * e.g AutomationLine rewrites the list with gain mapping.
-	 * the downside is that we can't perfom duplicate checks.
+	 * the downside is that we can't perform duplicate checks.
 	 * This code was changed in response to #6842
 	 */
 	lines.push_back (boost::shared_ptr<ARDOUR::AutomationList> (new ARDOUR::AutomationList(*al)));
@@ -1509,7 +1509,7 @@ Selection::set (const TrackViewList& track_list)
 
 	CoreSelection& selection (editor->session()->selection());
 
-#if 1 // crazy optmization hack
+#if 1 // crazy optimization hack
 	/* check is the selection actually changed, ignore NO-OPs
 	 *
 	 * There are excessive calls from EditorRoutes::selection_changed():
diff --git a/gtk2_ardour/session_metadata_dialog.h b/gtk2_ardour/session_metadata_dialog.h
index 9ae97b2626..bb8790cf82 100644
--- a/gtk2_ardour/session_metadata_dialog.h
+++ b/gtk2_ardour/session_metadata_dialog.h
@@ -270,7 +270,7 @@ private:
 
 /// Metadata dialog interface
 /**
- * The DataSets are initalized in this class so that all
+ * The DataSets are initialized in this class so that all
  * Dialogs have the same sets of data in the same order.
  */
 template <typename DataSet>
diff --git a/gtk2_ardour/session_option_editor.cc b/gtk2_ardour/session_option_editor.cc
index 8f7903ec99..5ef24fcc7c 100644
--- a/gtk2_ardour/session_option_editor.cc
+++ b/gtk2_ardour/session_option_editor.cc
@@ -182,7 +182,7 @@ SessionOptionEditor::SessionOptionEditor (Session* s)
 		sigc::mem_fun (*_session_config, &SessionConfiguration::set_native_file_data_format)
 		);
 	add_option (_("Media"), _sf);
-	/* refill available sample-formats, depening on file-format */
+	/* refill available sample-formats, depending on file-format */
 	parameter_changed ("native-file-header-format");
 
 	ComboOption<HeaderFormat>* hf = new ComboOption<HeaderFormat> (
diff --git a/gtk2_ardour/startup_fsm.cc b/gtk2_ardour/startup_fsm.cc
index 29ee9bdd86..6a5d13d173 100644
--- a/gtk2_ardour/startup_fsm.cc
+++ b/gtk2_ardour/startup_fsm.cc
@@ -658,7 +658,7 @@ StartupFSM::get_session_parameters_from_path (string const & path, string const
 		}
 
 		if (!have_resolved_template_name) {
-			/* this will produce a more or less meaninful error later:
+			/* this will produce a more or less meaningful error later:
 			 * "ERROR: Could not open session template [abs-path to user-config dir]"
 			 */
 			session_template = Glib::build_filename (ARDOUR::user_template_directory (), template_name);
@@ -687,7 +687,7 @@ StartupFSM::get_session_parameters_from_path (string const & path, string const
 /** return values:
  * -1: failure
  *  1: failure but user can retry
- *  0: success, seesion parameters ready for use
+ *  0: success, session parameters ready for use
  */
 int
 StartupFSM::check_session_parameters (bool must_be_new)
@@ -729,7 +729,7 @@ StartupFSM::check_session_parameters (bool must_be_new)
 	/* check for ".ardour" in statefile name, because we don't want
 	 * it
 	 *
-	 * XXX Note this wierd conflation of a
+	 * XXX Note this weird conflation of a
 	 * file-name-without-a-suffix and the session name. It's not
 	 * really a session name at all, but rather the suffix-free
 	 * name of a statefile (snapshot).
@@ -871,7 +871,7 @@ StartupFSM::copy_demo_sessions ()
 				continue;
 			}
 			/* skip sessions that are already in 'recent'.
-			 * eg. a new user changed <session-default-dir> shorly after installation
+			 * eg. a new user changed <session-default-dir> shortly after installation
 			 */
 			for (ARDOUR::RecentSessions::iterator r = rs.begin(); r != rs.end(); ++r) {
 				if ((*r).first == name) {
diff --git a/gtk2_ardour/stereo_panner.cc b/gtk2_ardour/stereo_panner.cc
index 671ccc98d7..4a288b5348 100644
--- a/gtk2_ardour/stereo_panner.cc
+++ b/gtk2_ardour/stereo_panner.cc
@@ -126,7 +126,7 @@ StereoPanner::set_tooltip ()
 	   This is expressed as a pair of percentage values that ranges from (100,0)
 	   (hard left) through (50,50) (hard center) to (0,100) (hard right).
 
-	   This is pretty wierd, but its the way audio engineers expect it. Just remember that
+	   This is pretty weird, but its the way audio engineers expect it. Just remember that
 	   the center of the USA isn't Kansas, its (50LA, 50NY) and it will all make sense.
 	*/
 
diff --git a/gtk2_ardour/strip_silence_dialog.cc b/gtk2_ardour/strip_silence_dialog.cc
index 22c95f50aa..78efd23fab 100644
--- a/gtk2_ardour/strip_silence_dialog.cc
+++ b/gtk2_ardour/strip_silence_dialog.cc
@@ -187,8 +187,8 @@ StripSilenceDialog::silences (AudioIntervalMap& m)
 void
 StripSilenceDialog::drop_rects ()
 {
-	// called by parent when starting to progess (dialog::run returned),
-	// but before the dialog is destoyed.
+	// called by parent when starting to progress (dialog::run returned),
+	// but before the dialog is destroyed.
 
 	_interthread_info.cancel = true;
 
diff --git a/gtk2_ardour/time_axis_view.cc b/gtk2_ardour/time_axis_view.cc
index f4cb11c680..e51399c938 100644
--- a/gtk2_ardour/time_axis_view.cc
+++ b/gtk2_ardour/time_axis_view.cc
@@ -977,7 +977,7 @@ TimeAxisView::order_selection_trims (ArdourCanvas::Item *item, bool put_start_on
 	}
 }
 
-// retuned rect is pushed back into the used_selection_rects list
+// returned rect is pushed back into the used_selection_rects list
 // in TimeAxisView::show_selection() which is the only caller.
 SelectionRect *
 TimeAxisView::get_selection_rect (uint32_t id)
diff --git a/gtk2_ardour/time_axis_view.h b/gtk2_ardour/time_axis_view.h
index 51e4a8843c..a4d1b9c7ae 100644
--- a/gtk2_ardour/time_axis_view.h
+++ b/gtk2_ardour/time_axis_view.h
@@ -275,7 +275,7 @@ protected:
 
 	virtual bool name_entry_changed (std::string const&);
 
-	/** Handle mouse relaese on our LHS control name ebox.
+	/** Handle mouse release on our LHS control name ebox.
 	 *
 	 *@ param ev the event
 	 */
diff --git a/gtk2_ardour/time_axis_view_item.cc b/gtk2_ardour/time_axis_view_item.cc
index 7092ce575b..b282754584 100644
--- a/gtk2_ardour/time_axis_view_item.cc
+++ b/gtk2_ardour/time_axis_view_item.cc
@@ -902,7 +902,7 @@ TimeAxisViewItem::manage_name_text ()
 
 /**
  * Callback used to remove this time axis item during the gtk idle loop.
- * This is used to avoid deleting the obejct while inside the remove_this_item
+ * This is used to avoid deleting the object while inside the remove_this_item
  * method.
  *
  * @param item the TimeAxisViewItem to remove.
diff --git a/gtk2_ardour/time_axis_view_item.h b/gtk2_ardour/time_axis_view_item.h
index 3667198d53..14ecb06f2c 100644
--- a/gtk2_ardour/time_axis_view_item.h
+++ b/gtk2_ardour/time_axis_view_item.h
@@ -131,7 +131,7 @@ public:
 	/** Emitted when the name of this item is changed */
 	sigc::signal<void,std::string,std::string,void*> NameChanged;
 
-	/** Emiited when the position of this item changes */
+	/** Emitted when the position of this item changes */
 	sigc::signal<void,Temporal::timepos_t,void*> PositionChanged;
 
 	/** Emitted when the position lock of this item is changed */
diff --git a/gtk2_ardour/transport_control.h b/gtk2_ardour/transport_control.h
index c3f7f0192a..eee4a38bf9 100644
--- a/gtk2_ardour/transport_control.h
+++ b/gtk2_ardour/transport_control.h
@@ -24,7 +24,7 @@
 
 #include "ardour/session_handle.h"
 
-/* This is an API implemenetd by AROUR_UI,
+/* This is an API implemented by AROUR_UI,
  * and made available to transport-control-UIs
  */
 class TransportControlProvider
diff --git a/gtk2_ardour/trigger_clip_picker.cc b/gtk2_ardour/trigger_clip_picker.cc
index 19c5625ea2..f1ce0055de 100644
--- a/gtk2_ardour/trigger_clip_picker.cc
+++ b/gtk2_ardour/trigger_clip_picker.cc
@@ -286,7 +286,7 @@ TriggerClipPicker::maybe_add_dir (std::string const& dir)
 	_dir.AddMenuElem (Gtkmm2ext::MenuElemNoMnemonic (display_name (dir), sigc::bind (sigc::mem_fun (*this, &TriggerClipPicker::list_dir), dir, (Gtk::TreeNodeChildren*)0)));
 
 	/* check if a parent path of the given dir already exists,
-	 * or if this new path is parent to any exising ones.
+	 * or if this new path is parent to any existing ones.
 	 */
 	bool insert = true;
 	auto it = _root_paths.begin ();
diff --git a/gtk2_ardour/trigger_page.cc b/gtk2_ardour/trigger_page.cc
index acd63e6d2e..799dfc96f7 100644
--- a/gtk2_ardour/trigger_page.cc
+++ b/gtk2_ardour/trigger_page.cc
@@ -421,7 +421,7 @@ TriggerPage::add_routes (RouteList& rl)
 			continue;
 		}
 #if 0
-		/* TODO, only subscribe to PropertyChanged, create (and destory) TriggerStrip as needed.
+		/* TODO, only subscribe to PropertyChanged, create (and destroy) TriggerStrip as needed.
 		 * For now we just hide non trigger strips.
 		 */
 		if (!(*r)->presentation_info ().trigger_track ()) {
diff --git a/gtk2_ardour/trigger_source_list.cc b/gtk2_ardour/trigger_source_list.cc
index 38fb3004df..586e53507c 100644
--- a/gtk2_ardour/trigger_source_list.cc
+++ b/gtk2_ardour/trigger_source_list.cc
@@ -31,7 +31,7 @@ TriggerSourceList::TriggerSourceList ()
 	setup_col (append_col (_columns.channels, "Chans    "), 1, ALIGN_LEFT, _("# Ch"), _("# Channels in the region"));
 	add_tag_column ();
 
-	setup_col (append_col (_columns.captd_xruns, "1234567890"), 21, ALIGN_RIGHT, _("# Xruns"), _("Number of dropouts that occured during recording"));
+	setup_col (append_col (_columns.captd_xruns, "1234567890"), 21, ALIGN_RIGHT, _("# Xruns"), _("Number of dropouts that occurred during recording"));
 	setup_col (append_col (_columns.take_id, "2021-01-19 02:34:03"), 18, ALIGN_LEFT, _("Take ID"), _("Take ID"));
 	_display.get_column (0)->set_resizable (true);
 }
diff --git a/gtk2_ardour/ui_config.h b/gtk2_ardour/ui_config.h
index c61c84d429..571ffb38c1 100644
--- a/gtk2_ardour/ui_config.h
+++ b/gtk2_ardour/ui_config.h
@@ -31,7 +31,7 @@
 #include <boost/function.hpp>
 #include <boost/bind.hpp>
 
-#include "ardour/types.h" // required for opeators used in pbd/configuration_variable.h
+#include "ardour/types.h" // required for operators used in pbd/configuration_variable.h
 #include "ardour/types_convert.h"
 
 #include "pbd/stateful.h"
diff --git a/gtk2_ardour/vca_time_axis.cc b/gtk2_ardour/vca_time_axis.cc
index 240939e553..754a8b4508 100644
--- a/gtk2_ardour/vca_time_axis.cc
+++ b/gtk2_ardour/vca_time_axis.cc
@@ -303,7 +303,7 @@ VCATimeAxisView::update_track_number_visibility ()
 
 		// see ArdourButton::on_size_request(), we should probably use a global size-group here instead.
 		// except the width of the number label is subtracted from the name-hbox, so we
-		// need to explictly calculate it anyway until the name-label & entry become ArdourWidgets.
+		// need to explicitly calculate it anyway until the name-label & entry become ArdourWidgets.
 
 		int tnw = (2 + std::max(2u, _session->track_number_decimals())) * number_label.char_pixel_width();
 		if (tnw & 1) --tnw;
diff --git a/gtk2_ardour/video_timeline.cc b/gtk2_ardour/video_timeline.cc
index ea07ca960c..e31656ed3e 100644
--- a/gtk2_ardour/video_timeline.cc
+++ b/gtk2_ardour/video_timeline.cc
@@ -329,7 +329,7 @@ VideoTimeLine::update_video_timeline()
 		/* high-zoom: need space between successive video-frames */
 		vtl_dist = rint(apv);
 	} else {
-		/* continous timeline: skip video-frames */
+		/* continuous timeline: skip video-frames */
 		vtl_dist = ceil(display_vframe_width * samples_per_pixel / apv) * apv;
 	}
 
diff --git a/gtk2_ardour/video_timeline.h b/gtk2_ardour/video_timeline.h
index 2d6d2c57c7..45c461d596 100644
--- a/gtk2_ardour/video_timeline.h
+++ b/gtk2_ardour/video_timeline.h
@@ -41,7 +41,7 @@ class PublicEditor;
  *
  *  The video-timeline can be displayed in a canvas-group. Given a filename
  *  it queries the video-server about file-information and
- *  creates \ref VideoImageFrame as neccesary (which
+ *  creates \ref VideoImageFrame as necessary (which
  *  query the server for image-data).
  *
  *  This class contains the algorithm to position the single frames
@@ -49,7 +49,7 @@ class PublicEditor;
  *  attributes. see \ref update_video_timeline()
  *
  *  The VideoTimeLine class includes functionality to launch a video-monitor
- *  corresponding to its currently diplayed file.
+ *  corresponding to its currently displayed file.
  */
 class VideoTimeLine : public sigc::trackable, public ARDOUR::SessionHandlePtr, public PBD::ScopedConnectionList, public PBD::StatefulDestructible
 {
diff --git a/libs/ardour/ardour/port_engine.h b/libs/ardour/ardour/port_engine.h
index 056b70f31b..6272c04f62 100644
--- a/libs/ardour/ardour/port_engine.h
+++ b/libs/ardour/ardour/port_engine.h
@@ -283,7 +283,7 @@ public:
 	 */
 	virtual bool  connected_to (PortHandle port, const std::string& name, bool process_callback_safe = true) = 0;
 
-	/** Test if given \p port is is connected to physical I/O ports.
+	/** Test if given \p port is connected to physical I/O ports.
 	 *
 	 * @param port \ref PortHandle of source port to test
 	 * @param process_callback_safe true if this method is not called from rt-context of backend callbacks
diff --git a/libs/ardour/ardour/session.h b/libs/ardour/ardour/session.h
index 256c44cde7..86d4582260 100644
--- a/libs/ardour/ardour/session.h
+++ b/libs/ardour/ardour/session.h
@@ -1101,7 +1101,7 @@ public:
 	 * Test if any undo commands were added since the
 	 * call to begin_reversible_command ()
 	 *
-	 * This is is useful to determine if an undoable
+	 * This is useful to determine if an undoable
 	 * action was performed before adding additional
 	 * information (e.g. selection changes) to the
 	 * undo transaction.
diff --git a/libs/ardour/ardour/worker.h b/libs/ardour/ardour/worker.h
index be4079e1e2..d456a2cd98 100644
--- a/libs/ardour/ardour/worker.h
+++ b/libs/ardour/ardour/worker.h
@@ -97,7 +97,7 @@ private:
 	/**
 	   Peek in RB, get size and check if a block of 'size' is available.
 
-	   Handle the unlikley edge-case, if we're called in between the
+	   Handle the unlikely edge-case, if we're called in between the
 	   responder writing 'size' and 'data'.
 
 	   @param rb the ringbuffer to check
diff --git a/libs/ardour/mute_control.cc b/libs/ardour/mute_control.cc
index 30db61154c..8e6965c421 100644
--- a/libs/ardour/mute_control.cc
+++ b/libs/ardour/mute_control.cc
@@ -198,7 +198,7 @@ MuteControl::automation_run (samplepos_t start, pframes_t len)
 
 	if (muted_by_masters ()) {
 		/* already muted, no need to check further,
-		 * except we need to up update implicit/explict mute
+		 * except we need to up update implicit/explicit mute
 		 */
 		if (muted_by_self () != mute) {
 			set_value_unchecked (mute ? 1. : 0.);
diff --git a/libs/ardour/route.cc b/libs/ardour/route.cc
index 488ae0f4db..cf8d1c3d8a 100644
--- a/libs/ardour/route.cc
+++ b/libs/ardour/route.cc
@@ -2105,7 +2105,7 @@ Route::apply_processor_order (const ProcessorList& new_order)
 	 * (note though that  ::processors_reorder_needs_configure() ensured that
 	 * this function will only ever be called from the rt-thread if no processor were removed)
 	 *
-	 * either way, I can't proove it, but an xrun due to re-order here is less likley
+	 * either way, I can't proove it, but an xrun due to re-order here is less likely
 	 * than an xrun-less 'ardour-silent cycle' both of which effectively "click".
 	 */