Update Ableton playback state logic for accurate EP representation

src/lib/exporters/ableton/playback.ts

@@ -1,10 +1,27 @@
 export type AbletonPlaybackMode = 'oneshot' | 'key' | 'legato';
 
 export function getSimplerPlaybackState(projectMode: AbletonPlaybackMode) {
-  return {
+  switch (projectMode) {
-    playbackMode: 1,
+    case 'oneshot':
-    voices: projectMode === 'key' ? 5 : 0,
+      return {
-    retrigger: projectMode === 'oneshot',
+        playbackMode: 1,
-    portamentoMode: projectMode === 'legato' ? 2 : 0,
+        voices: 0,
-  };
+        retrigger: true,
+        portamentoMode: 0,
+      };
+    case 'key':
+      return {
+        playbackMode: 0,
+        voices: 5,
+        retrigger: true,
+        portamentoMode: 0,
+      };
+    case 'legato':
+      return {
+        playbackMode: 0,
+        voices: 1,
+        retrigger: false,
+        portamentoMode: 2,
+      };
+  }
 }

tests/ableton-playback.test.ts

@@ -2,16 +2,19 @@ import assert from 'node:assert/strict';
 import test from 'node:test';
 import { getSimplerPlaybackState } from '../src/lib/exporters/ableton/playback';
 
-test('exports every EP playback mode as automatic One-Shot Trigger playback', () => {
+test('exports EP KEY as polyphonic Classic playback', () => {
   assert.deepEqual(getSimplerPlaybackState('key'), {
-    playbackMode: 1,
+    playbackMode: 0,
     voices: 5,
-    retrigger: false,
+    retrigger: true,
     portamentoMode: 0,
   });
+});
+
+test('exports EP LEGATO as monophonic Classic playback without retriggering', () => {
   assert.deepEqual(getSimplerPlaybackState('legato'), {
-    playbackMode: 1,
+    playbackMode: 0,
-    voices: 0,
+    voices: 1,
     retrigger: false,
     portamentoMode: 2,
   });