Can you block the callback thread during an offline render?

[daniel]

Final Cut for example is know to not sending isNonRealTime():

Final Cut and the samplerate

Hmmm just tested this but I can’t seem to reproduce this issue. I’m getting a prepareToPlay call with the correct sample rate. However, FCPX does not seem to be sending any offline-render notifications.

There was something about audacity and Studio One mentioned in the thread, but I don’t know what the last status is.
Anything using asynchronous stuff (e.g. my plugin uses BufferingAudioSources to stream) will need to block.