[LAU] Long-running jack_capture multi-track recording corruption?

[Andrew Grathwohl]

Hi list,

I am using jack_capture to record 2 inputs and 20 outputs going through 
SuperCollider for a duration of between 30-45 minutes, using the 
following command line:

jack_capture -f wavex -p supernova:* test.wav

This has worked well for my use case for several years. However, since 
yesterday this command line fails to capture the entire recorded 
performance, despite jack_capture showing the meters responding to the 
audio correctly. Whenever the recording duration exceeds approximately 
20 minutes, the output file will only contain the first 5-10 minutes. 
However, if we only do a 5-10 minute recording, the entire recording is 
captured and saved properly.

Seeking any insights about how to diagnose/fix these problems. Anyone 
here know where I ought to start?

Thanks much,
Andrew