diff --git a/libs/ardour/ardour/session.h b/libs/ardour/ardour/session.h
index b2afd9decc..1bfbc7d203 100644
--- a/libs/ardour/ardour/session.h
+++ b/libs/ardour/ardour/session.h
@@ -1386,7 +1386,7 @@ public:
 	int num_triggerboxes () const;
 	std::shared_ptr<TriggerBox> triggerbox_at (int32_t route_index) const;
 	TriggerPtr trigger_at (int32_t route_index, int32_t row_index) const;
-	bool bang_trigger_at(int32_t route_index, int32_t row_index);
+	bool bang_trigger_at(int32_t route_index, int32_t row_index, float velocity = 1.0);
 	bool unbang_trigger_at(int32_t route_index, int32_t row_index);
 	void clear_cue (int row_index);
 
diff --git a/libs/ardour/ardour/triggerbox.h b/libs/ardour/ardour/triggerbox.h
index c31ae2626b..45905db455 100644
--- a/libs/ardour/ardour/triggerbox.h
+++ b/libs/ardour/ardour/triggerbox.h
@@ -261,7 +261,7 @@ class LIBARDOUR_API Trigger : public PBD::Stateful {
 	/* Calling ::bang() will cause this Trigger to be placed in its owning
 	   TriggerBox's queue.
 	*/
-	void bang ();
+	void bang (float velocity = 1.0f);
 
 	/* Calling ::unbang() is equivalent to a mouse-up or note-off
 	    ... it MIGHT cause a clip to stop, but more likely has no effect, depending on the slot's launch-style.
@@ -745,7 +745,7 @@ class LIBARDOUR_API TriggerBox : public Processor
 
 	TriggerPtr trigger (Triggers::size_type);
 
-	void bang_trigger_at (Triggers::size_type row);
+	void bang_trigger_at (Triggers::size_type row, float velocity = 1.0f);
 	void unbang_trigger_at (Triggers::size_type row);
 
 	void add_trigger (TriggerPtr);
diff --git a/libs/ardour/session_process.cc b/libs/ardour/session_process.cc
index 99c9434ccf..c5db5d0f0f 100644
--- a/libs/ardour/session_process.cc
+++ b/libs/ardour/session_process.cc
@@ -1729,7 +1729,7 @@ Session::trigger_cue_row (int32_t cue)
 
 
 bool
-Session::bang_trigger_at (int32_t route_index, int32_t row_index)
+Session::bang_trigger_at (int32_t route_index, int32_t row_index, float velocity)
 {
 	/* this is a convenience function for simple control surfaces to bang a trigger without any regards to banking */
 
@@ -1747,7 +1747,7 @@ Session::bang_trigger_at (int32_t route_index, int32_t row_index)
 			continue;
 		}
 		if (index == route_index) {
-			r->triggerbox()->bang_trigger_at(row_index);
+			r->triggerbox()->bang_trigger_at(row_index, velocity);
 			return true;
 		}
 		index++;
diff --git a/libs/ardour/triggerbox.cc b/libs/ardour/triggerbox.cc
index 80c8b1d8c5..714d9710f8 100644
--- a/libs/ardour/triggerbox.cc
+++ b/libs/ardour/triggerbox.cc
@@ -560,11 +560,12 @@ Trigger::set_ui (void* p)
 }
 
 void
-Trigger::bang ()
+Trigger::bang (float velocity)
 {
 	if (!_region) {
 		return;
 	}
+	_pending_velocity_gain = velocity;
 	_bang.fetch_add (1);
 	DEBUG_TRACE (DEBUG::Triggers, string_compose ("bang on %1\n", _index));
 }
@@ -2072,7 +2073,13 @@ AudioTrigger::audio_run (BufferSet& bufs, samplepos_t start_sample, samplepos_t
 				AudioBuffer& buf (bufs.get_audio (chn));
 				Sample* src = do_stretch ? bufp[channel] : (data[channel] + read_index);
 
-				gain_t gain = _velocity_gain * _gain;  //incorporate the gain from velocity_effect
+				gain_t gain;
+
+				if (_velocity_effect) {
+					gain = (_velocity_effect * _velocity_gain) * _gain;
+				} else {
+					gain = _gain;
+				}
 
 				if (gain != 1.0f) {
 					buf.accumulate_with_gain_from (src, from_stretcher, gain, dest_offset);
@@ -3762,11 +3769,11 @@ TriggerBox::stop_all_quantized ()
 }
 
 void
-TriggerBox::bang_trigger_at (Triggers::size_type row)
+TriggerBox::bang_trigger_at (Triggers::size_type row, float velocity)
 {
 	TriggerPtr t = trigger(row);
 	if (t && t->region()) {
-		t->bang();
+		t->bang (velocity);
 	} else {
 		/* by convention, an empty slot is effectively a STOP button */
 		stop_all_quantized();