diff --git a/gtk2_ardour/editor.h b/gtk2_ardour/editor.h
index a98df48a23..a5c7d39faa 100644
--- a/gtk2_ardour/editor.h
+++ b/gtk2_ardour/editor.h
@@ -2369,7 +2369,7 @@ private:
 	void set_show_touched_automation (bool);
 	bool _show_touched_automation;
 
-	int time_fx (ARDOUR::RegionList&, float val, bool pitching);
+	int time_fx (ARDOUR::RegionList&, Temporal::ratio_t ratio, bool pitching);
 	void note_edit_done (int, EditNoteDialog*);
 	void toggle_sound_midi_notes ();
 
diff --git a/gtk2_ardour/editor_timefx.cc b/gtk2_ardour/editor_timefx.cc
index fd8b22a170..15aad444d8 100644
--- a/gtk2_ardour/editor_timefx.cc
+++ b/gtk2_ardour/editor_timefx.cc
@@ -159,7 +159,7 @@ Editor::pitch_shift (RegionSelection& regions, float fraction)
  *  @param pitching true to pitch shift, false to time stretch.
  *  @return -1 in case of error, otherwise number of regions processed */
 int
-Editor::time_fx (RegionList& regions, float val, bool pitching)
+Editor::time_fx (RegionList& regions, Temporal::ratio_t ratio, bool pitching)
 {
 	delete current_timefx;
 
@@ -169,7 +169,7 @@ Editor::time_fx (RegionList& regions, float val, bool pitching)
 	}
 
 	const timecnt_t oldlen = regions.front()->length();
-	const timecnt_t newlen = regions.front()->length() * val;
+	const timecnt_t newlen = regions.front()->length() * ratio;
 	const timepos_t pos = regions.front()->position ();
 
 	current_timefx = new TimeFXDialog (*this, pitching, oldlen, newlen, pos);
diff --git a/gtk2_ardour/time_fx_dialog.cc b/gtk2_ardour/time_fx_dialog.cc
index a7f541e726..1b4a108e46 100644
--- a/gtk2_ardour/time_fx_dialog.cc
+++ b/gtk2_ardour/time_fx_dialog.cc
@@ -147,8 +147,7 @@ TimeFXDialog::TimeFXDialog (Editor& e, bool pitch, timecnt_t const & oldlen, tim
 		duration_clock->set_session (e.session());
 		duration_clock->set (timepos_t (new_length), true);
 		duration_clock->set_mode (AudioClock::BBT);
-#warning NUTEMPO FIXME figure out what we are doing here
-		// duration_clock->set_bbt_reference (position);
+		duration_clock->set_bbt_reference (position);
 
 		Gtk::Alignment* clock_align = manage (new Gtk::Alignment);
 		clock_align->add (*duration_clock);
@@ -260,14 +259,14 @@ TimeFXDialog::delete_in_progress (GdkEventAny*)
 	return TRUE;
 }
 
-float
+Temporal::ratio_t
 TimeFXDialog::get_time_fraction () const
 {
 	if (pitching) {
-		return 1.0;
+		return Temporal::ratio_t (1, 1);
 	}
 
-	return duration_adjustment.get_value() / 100.0;
+	return Temporal::ratio_t (duration_adjustment.get_value(), 100);
 }
 
 float
diff --git a/gtk2_ardour/time_fx_dialog.h b/gtk2_ardour/time_fx_dialog.h
index 4372c5050b..a31401c0fa 100644
--- a/gtk2_ardour/time_fx_dialog.h
+++ b/gtk2_ardour/time_fx_dialog.h
@@ -71,7 +71,7 @@ public:
 	void cancel_in_progress ();
 	gint delete_in_progress (GdkEventAny*);
 
-	float get_time_fraction () const;
+	Temporal::ratio_t get_time_fraction () const;
 	float get_pitch_fraction () const;
 
 	void start_updates ();