diff --git a/scripts/_vamp_audio_to_midi.lua b/scripts/vamp_audio_to_midi.lua
similarity index 76%
rename from scripts/_vamp_audio_to_midi.lua
rename to scripts/vamp_audio_to_midi.lua
index f2395eb40c..79fc32ac83 100644
--- a/scripts/_vamp_audio_to_midi.lua
+++ b/scripts/vamp_audio_to_midi.lua
@@ -1,5 +1,17 @@
-ardour { ["type"] = "EditorAction", name = "Vamp Audio to MIDI",
-description = "analyze audio from selected audio region to selected midi region" }
+ardour {
+	["type"] = "EditorAction",
+	name = "Polyphonic Audio to MIDI",
+	license     = "MIT",
+	author      = "Ardour Team",
+description = [[
+Analyze audio from the selected audio region to a selected MIDI region.
+
+A MIDI region on the target track will have to be created first (use the pen tool).
+
+This script uses the Polyphonic Transcription VAMP plugin from Queen Mary Univ, London.
+The plugin works best at 44.1KHz input sample rate, and is tuned for piano and guitar music. Velocity is not estimated.
+]]
+}
 
 function factory () return function ()
 	local sel = Editor:get_selection ()
@@ -21,7 +33,7 @@ function factory () return function ()
 			if et > end_time then
 				end_time = et
 			end
-			table.insert(audio_regions, r) 
+			table.insert(audio_regions, r)
 		else
 			midi_region = r:to_midiregion()
 		end