Not sure how it works, but I accidentally clicked "+" on LoopEnd and that fixed the problem! Looks like Sampler counts sample length differently or something.

My loop end point is exactly at the end of the sample so I shouldn't be able to increase LoopEnd position by clicking "+", but all samples have +1 "gap" at the end of the sample.

And if the loop region is in the middle of the sample, then "+1" or "-1" on LoopEnd or LoopStart fixes the problem.

Maybe this will be useful for someone :)

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@DabDab I'm using MIDI scripts like these

https://forum.hise.audio/topic/1122/midi-transpose-cents/2

https://forum.hise.audio/topic/2714/adjust-semitones-frontpanel/9

And there is built-in Transpose MIDI script in HISE

@Christoph-Hart ahhh, thanks! 8 should be enough.

@d-healey Well, that was easy. Thanks a lot for your help! This is my first experience with development.

For some reason it only compiled VST, but at least it works :)

@d-healey Thanks! I'm going to watch all your videos some day, they're very helpful!

@lalalandsynth You can't modulate sample start with Wavetable. So if you want to use unison + detune (like in a regular synth) to make some typical synth lead it will sound kinda weird, with some flanger effect.

@d-healey Thanks again, will try this option for now. But hopefully Christoph will fix this in some future updates.

@d-healey unfortunately, Hise still crashes when I turn octave or semi tone knobs.

@Lindon I tried to add per-filtering before and after, it still crashes.

@d-healey oh, so it's not just me :) Thank you for taking time to figure out this issue.

I don't think the user will go that low, but it possible that someone accidentally find this bug (like I did) and will be annoyed by ruined session.

@d-healey it's on top, after the Interface script. And Transposer is on Sampler level.

BTW I switched to MBP and the issue is still there. Midi keyboard is the same.

@d-healey Well, when I set to -5 then only C-2 crashes Hise, C#-2 and above - all good.

But when I set -6, then it starts crashing on C-2 and C#-2

aaaaand if it's -7, then it starts crashing from D-2. Like there is some dependency

@d-healey If you mean to test it with the mouse then yes, it crashes Hise.

@d-healey I rarely use it and I don't know how to switch octaves, it's always plays higher ranges.

Here is the project. NoteRangeTest.zip

@d-healey Will do that in few minutes. If I do it with the mouse like you, then it works fine, but when I press the lowest key on the midi keyboard it crashes.