sample load crash

[Float-pixel]

sample crash log.txt

if you audition a sample, then try to load the same sample while the audition is still going on, it can cause a crash.

I can reproduce this by making a new project, random name, make instrument 00 sample, audition a sample long enough to then try to load the sample while still auditioning. attached is a serial log.

This seems to happen specifically in new projects. Can be worked around by simply waiting for auditions to end before loading.

[maks]

I'm pretty sure I know already why this happens: the file system is not intended to be accessed simultaneously from both cpu cores so there is a mutex to prevent that. But that would be exactly what would happen in this case as sample preview happens on core1 (audio rendering) while the file copy operation for importing a sample would be on core0 and so at best would stall core0 until the audio preview playback finished.
Instead we just need to add a check that prevents starting sample import if sample preview playback is in progress.