Warn user about samplerate being other than 44100 (was: Recording seems to skip steps)

[MartiniMoe]

On the left you can see my track in Renoise. On the right is Sointu after recording the notes from renoise. As you can see there is a skipped empty step at 05/06. This repeats on steps 12/13, 1F/20 and so on.

Any idea what is causing this?

[vsariola]

Maybe Sointu doesn't get BPM from host correctly? Try setting BPM manually to correct before recording. Alternatively, there is some rounding issue with the rounding of MIDI events frames to row numbers. I'll investigate

[vsariola]

So things go wrong somehow here:

sointu/tracker/recording.go

Line 142 in c08a319

func frameToRow(BPM float64, rowsPerBeat, frame int) int {

[vsariola]

I don't know how Renoise does BPM changes but if the BPM doesn't stay constant for some reason, it could explain

[MartiniMoe]

Hmm, both were set to the same bpm

[vsariola]

Maybe you are at 48000 samplerate, while Sointu assumes fixed 44100?

[MartiniMoe]

Maybe you are at 48000 samplerate, while Sointu assumes fixed 44100?

Ah, that was it! 🎉

I'm using pipewire and running pw-metadata -n settings 0 clock.force-rate 44100 fixed this for me! Thank a lot :)

[vsariola]

I'll make this into a feature request: warn user about wrong samplerate & document the requirement for 44100. Granted, in the year 2024, that number could be 48000. But there's historical baggage here.

[vsariola]

Nice to hear you are able to compile & run the VSTI on Linux btw :)

[vsariola]

This should get the job done: