diff --git a/src/lib/exporters/ableton/automation.ts b/src/lib/exporters/ableton/automation.ts
index 413fef0..396ac1c 100644
--- a/src/lib/exporters/ableton/automation.ts
+++ b/src/lib/exporters/ableton/automation.ts
@@ -6,6 +6,7 @@ export type AbletonAutomationTarget = {
   arrangement?: number;
   session?: number;
   maxValue?: number;
+  soundLength?: number;
 };
 
 export type AbletonAutomationTargets = Partial<Record<FaderParam, AbletonAutomationTarget[]>>;
@@ -62,10 +63,12 @@ export function convertFaderValue(
       convertedValue = value;
       break;
     case FaderParam.ATK:
-      convertedValue = koEnvRangeToSeconds(value * 255, track.soundLength) * 1000;
+      convertedValue =
+        koEnvRangeToSeconds(value * 255, target?.soundLength ?? track.soundLength) * 1000;
       break;
     case FaderParam.REL:
-      convertedValue = koEnvRangeToSeconds(value * 255, track.soundLength) * 1000;
+      convertedValue =
+        koEnvRangeToSeconds(value * 255, target?.soundLength ?? track.soundLength) * 1000;
       break;
     case FaderParam.PAN:
       convertedValue = (value - 0.5) * 2;
diff --git a/src/lib/exporters/ableton/builders.ts b/src/lib/exporters/ableton/builders.ts
index 0dee6f6..fd9b67d 100644
--- a/src/lib/exporters/ableton/builders.ts
+++ b/src/lib/exporters/ableton/builders.ts
@@ -104,7 +104,7 @@ function setLive10SampleReference(fileRef: any, sampleName: string) {
   fileRef.LivePackId = { '@Value': '' };
 }
 
-function targetFor(parameter: any, maxValue?: number) {
+function targetFor(parameter: any, maxValue?: number, soundLength?: number) {
   const automationTarget =
     parameter?.AutomationTarget?.['@Id'] === undefined
       ? undefined
@@ -113,6 +113,7 @@ function targetFor(parameter: any, maxValue?: number) {
     arrangement: automationTarget,
     session: automationTarget,
     maxValue,
+    soundLength,
   };
 }
 
@@ -188,6 +189,10 @@ function trackAutomationTargets(midiTrack: any, includeArrangementMixer: boolean
 
   findSimplers(midiTrack.DeviceChain.DeviceChain.Devices).forEach((simpler) => {
     const oneshot = Number(simpler.Globals.PlaybackMode['@Value']) === 1;
+    const sampleRef = simpler.Player.MultiSampleMap.SampleParts.MultiSamplePart.SampleRef;
+    const sampleRate = Number(sampleRef.DefaultSampleRate?.['@Value']);
+    const sampleDuration = Number(sampleRef.DefaultDuration?.['@Value']);
+    const soundLength = sampleRate > 0 ? sampleDuration / sampleRate : undefined;
     addTarget(targets, FaderParam.PTC, targetFor(simpler.Pitch.TransposeKey));
     addTarget(targets, FaderParam.TUNE, targetFor(simpler.Pitch.TransposeFine));
     addTarget(
@@ -198,6 +203,7 @@ function trackAutomationTargets(midiTrack: any, includeArrangementMixer: boolean
           ? simpler.VolumeAndPan.OneShotEnvelope.FadeInTime
           : simpler.VolumeAndPan.Envelope.AttackTime,
         oneshot ? 2000 : undefined,
+        soundLength,
       ),
     );
     addTarget(
@@ -208,6 +214,7 @@ function trackAutomationTargets(midiTrack: any, includeArrangementMixer: boolean
           ? simpler.VolumeAndPan.OneShotEnvelope.FadeOutTime
           : simpler.VolumeAndPan.Envelope.ReleaseTime,
         oneshot ? 2000 : undefined,
+        soundLength,
       ),
     );
     addTarget(targets, FaderParam.MOD, targetFor(simpler.Pitch.PitchLfoAmount));