diff --git a/src/lib/exporters/ableton/builders.ts b/src/lib/exporters/ableton/builders.ts
index 91462ca..c0744c4 100644
--- a/src/lib/exporters/ableton/builders.ts
+++ b/src/lib/exporters/ableton/builders.ts
@@ -202,17 +202,6 @@ function trackAutomationTargets(
   }
 
   findSimplers(midiTrack.DeviceChain.DeviceChain.Devices).forEach((simpler) => {
-    const oneshot = Number(simpler.Globals.PlaybackMode['@Value']) === 1;
-    const samplePart = simpler.Player.MultiSampleMap.SampleParts.MultiSamplePart;
-    const sampleRef = samplePart.SampleRef;
-    const sampleRate = Number(sampleRef.DefaultSampleRate?.['@Value']);
-    const sampleDuration = Number(sampleRef.DefaultDuration?.['@Value']);
-    const trimmedFrames =
-      Number(samplePart.SampleEnd['@Value']) - Number(samplePart.SampleStart['@Value']);
-    const soundLength =
-      sampleRate > 0
-        ? (trimmedFrames > 0 ? trimmedFrames : sampleDuration) / sampleRate
-        : undefined;
     const pitchTarget = targetFor(simpler.Pitch.TransposeKey);
     const staticPitchValue = koTrack.faderParams[FaderParam.PTC];
     const staticPitchOffset =
@@ -221,30 +210,6 @@ function trackAutomationTargets(
       Number(simpler.Pitch.TransposeKey.Manual['@Value']) - staticPitchOffset;
     addTarget(targets, FaderParam.PTC, pitchTarget);
     addTarget(targets, FaderParam.TUNE, targetFor(simpler.Pitch.TransposeFine));
-    addTarget(
-      targets,
-      FaderParam.ATK,
-      targetFor(
-        oneshot
-          ? simpler.VolumeAndPan.OneShotEnvelope.FadeInTime
-          : simpler.VolumeAndPan.Envelope.AttackTime,
-        oneshot ? 2000 : undefined,
-        soundLength,
-        false,
-      ),
-    );
-    addTarget(
-      targets,
-      FaderParam.REL,
-      targetFor(
-        oneshot
-          ? simpler.VolumeAndPan.OneShotEnvelope.FadeOutTime
-          : simpler.VolumeAndPan.Envelope.ReleaseTime,
-        oneshot ? 2000 : undefined,
-        soundLength,
-        oneshot,
-      ),
-    );
     addTarget(targets, FaderParam.MOD, targetFor(simpler.Pitch.PitchLfoAmount));
   });
 
@@ -382,7 +347,6 @@ async function buildSimplerDevice(koTrack: AblTrack, abletonVersion: AbletonVers
   const samplePart = device.Player.MultiSampleMap.SampleParts.MultiSamplePart;
   const loopModulators = device.Player.LoopModulators;
   const simplerFilter = device.Filter.Slot.Value.SimplerFilter;
-  const playbackDuration = simplerPlaybackDuration(koTrack);
 
   device.LastPresetRef.Value = {} as any;
   device.ShouldShowPresetName['@Value'] = 'false';
@@ -400,9 +364,11 @@ async function buildSimplerDevice(koTrack: AblTrack, abletonVersion: AbletonVers
   simplerFilter.ModByLfo.Manual['@Value'] = 0;
   device.Lfo.IsOn.Manual['@Value'] = 'false';
   device.Pitch.PitchLfoAmount.Manual['@Value'] = 0;
-  device.VolumeAndPan.OneShotEnvelope.FadeInTime.Manual['@Value'] = 0;
-  device.VolumeAndPan.OneShotEnvelope.FadeOutTime.Manual['@Value'] = 0;
+  device.VolumeAndPan.OneShotEnvelope.FadeInTime.Manual['@Value'] = SIMPLER_FADE_IN_MS;
+  device.VolumeAndPan.OneShotEnvelope.FadeOutTime.Manual['@Value'] = SIMPLER_FADE_OUT_MS;
   device.VolumeAndPan.OneShotEnvelope.SustainMode.Manual['@Value'] = 0;
+  device.VolumeAndPan.Envelope.AttackTime.Manual['@Value'] = SIMPLER_ATTACK_MS;
+  device.VolumeAndPan.Envelope.ReleaseTime.Manual['@Value'] = SIMPLER_RELEASE_MS;
   device.Globals.PlaybackMode['@Value'] = playbackState.playbackMode;
   device.Globals.NumVoices['@Value'] = playbackState.voices;
   device.Globals.RetriggerMode['@Value'] = playbackState.retrigger;
@@ -445,44 +411,8 @@ async function buildSimplerDevice(koTrack: AblTrack, abletonVersion: AbletonVers
   // setting velocity scaling to 20% to match KO behavior
   device.VolumeAndPan.VolumeVelScale.Manual['@Value'] = 0.2;
 
-  const attackTarget = playbackState.useOneShotEnvelope
-    ? device.VolumeAndPan.OneShotEnvelope.FadeInTime
-    : device.VolumeAndPan.Envelope.AttackTime;
-  const releaseTarget = playbackState.useOneShotEnvelope
-    ? device.VolumeAndPan.OneShotEnvelope.FadeOutTime
-    : device.VolumeAndPan.Envelope.ReleaseTime;
-  attackTarget.Manual['@Value'] = simplerEnvelopeMilliseconds(
-    koTrack.attack,
-    playbackDuration,
-    playbackState.useOneShotEnvelope,
-  );
-  releaseTarget.Manual['@Value'] = simplerEnvelopeMilliseconds(
-    koTrack.release,
-    playbackDuration,
-    playbackState.useOneShotEnvelope,
-    playbackState.useOneShotEnvelope,
-  );
   device.VolumeAndPan.Panorama.Manual['@Value'] = koTrack.pan;
 
-  // overriding attack time if ATK fader param is defined
-  if (koTrack.faderParams[FaderParam.ATK] !== -1) {
-    attackTarget.Manual['@Value'] = simplerEnvelopeMilliseconds(
-      koTrack.faderParams[FaderParam.ATK] * 255,
-      playbackDuration,
-      playbackState.useOneShotEnvelope,
-    );
-  }
-
-  // overriding release time if REL fader param is defined
-  if (koTrack.faderParams[FaderParam.REL] !== -1) {
-    releaseTarget.Manual['@Value'] = simplerEnvelopeMilliseconds(
-      koTrack.faderParams[FaderParam.REL] * 255,
-      playbackDuration,
-      playbackState.useOneShotEnvelope,
-      playbackState.useOneShotEnvelope,
-    );
-  }
-
   let pitch = koTrack.pitch || 0;
   if (koTrack.samplePitch) {
     pitch += koTrack.samplePitch;