From fa3ae193bbcb7663b9f910279262e2d8affd4dd7 Mon Sep 17 00:00:00 2001
From: Victor Giers <mail@victorgiers.com>
Date: Tue, 14 Jul 2026 11:29:03 +0200
Subject: [PATCH] Update Simpler track handling to use WeakMap

---
 src/lib/exporters/ableton/builders.ts | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/src/lib/exporters/ableton/builders.ts b/src/lib/exporters/ableton/builders.ts
index 530256a..1353580 100644
--- a/src/lib/exporters/ableton/builders.ts
+++ b/src/lib/exporters/ableton/builders.ts
@@ -64,6 +64,7 @@ let _localId = -1;
 let _localGroupId = -1;
 let _localTrackColor = -1;
 let _localGroupTrackColor = -1;
+const simplerPadTracks = new WeakMap<object, AblTrack>();
 
 const MIN_CLIP_LAUNCHER_SCENES = 8;
 type AbletonVersion = '10' | '11';
@@ -200,11 +201,8 @@ function trackAutomationTargets(
     addTarget(targets, FaderParam.FX, target);
   }
 
-  const padTracks = koTrack.drumRack
-    ? koTrack.tracks.filter((track) => Boolean(track.sampleName))
-    : [koTrack];
-  findSimplers(midiTrack.DeviceChain.DeviceChain.Devices).forEach((simpler, index) => {
-    const padTrack = padTracks[index] ?? koTrack;
+  findSimplers(midiTrack.DeviceChain.DeviceChain.Devices).forEach((simpler) => {
+    const padTrack = simplerPadTracks.get(simpler) ?? koTrack;
     const pitchTarget = targetFor(simpler.Pitch.TransposeKey, padTrack);
     const staticPitchValue = padTrack.faderParams[FaderParam.PTC];
     const staticPitchOffset =
@@ -350,6 +348,7 @@ async function buildSimplerDevice(
 ) {
   const simplerTemplate = await loadTemplate<ALSSimpler>('simpler', abletonVersion);
   const device = structuredClone(simplerTemplate.OriginalSimpler);
+  simplerPadTracks.set(device, koTrack);
   const padSound = getPadSoundState(koTrack);
   const padEnvelope = getPadEnvelopeState(padSound);
   const playbackState = getSimplerPlaybackState(padSound.playMode);