@Christoph-Hart Still getting nasty sounds with time stretching.

Here's an audio file rendered directly from HISE. You can hear the distortion at the beginning, this is just by enabling time-stretching for the sampler without changing the ratio.

HiseExport.wav

Ok here's the solution - well it doesn't answer my question but it gets the job done.

const var Sampler1 = Synth.getSampler("Sampler1"); const th = Engine.createTransportHandler(); th.setOnTempoChange(true, updateTimeStretchRatio); // fetch the current state const var obj = Sampler1.getTimestretchOptions(); // Apply your changes obj.SkipLatency = true; // Update the options Sampler1.setTimestretchOptions(obj); inline function updateTimeStretchRatio(newTempo) { local ratio = newTempo / 140; Sampler1.setTimestretchRatio(ratio); }

The CI for the fix seems to have got stuck https://github.com/christophhart/HISE/actions/runs/12342377762/job/34442128570