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I think there's an old bug hiding in the code which leads to single audio clips played too early (about one beat) when
- having a session that makes some load due to many plugins
- having many instances of an audio clip on an audio track, each with separate offset and length, the situation that happens when you align vocals to the beat or transpose or stretch some parts
- repositioning the playhead and press play immediately
It can be avoided when I wait a second after repositioning the playhead until I press play. At least I could never reproduce it when I wait a second after positioning the playhead.
So I think there is some asynchronous processing after repositioning the playhead that prepares the audio clips to be played at the proper time. And I think it could be fixed by delaying play until this setup has finished.
I'd like to examine the code but I cannot find the place where the playhead is repositioned.
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re. Need help examining an old problem...
yes probably... but first check if the problem is happening the same at loop turnarounds (please try and set the loop-start point at one of the known (manual) play-head repositioning)...
seeya
Not in loops
I never encountered this effect inside a loop. I guess the audio clips are setup once before playback starts.
It might be possible that it occurs in a loop, too, when I press play immediately after repositioning the playhead. Then it should happen in every loop pass. But I couldn't reproduce it so far.
There is another problem with loops: a small drift in time when loops are inside he bounds of an audio clip. Then – depending on the length, offset and whatever else – the audio file drifts after lots of loop passes, maybe during a rounding error. But this should be a completely different issue.
.re There is another problem with loops
Yes, and that small offset at the beginning causes random artifacts when looping is activated, since the waveform doesn't start at 0 when it skips forward.
I never thought it was a big deal because I only use loops as a reference. But it's annoying. If it can be fixed, it would be welcome, although as I said, it's not a big deal to me.
I suppose if someone wants to use loops to send audio to other applications, then it's a critical issue.
I don't know if it would be worth opening a separate thread for this topic.
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