“underrun” means the aloop node doesn’t send the audio data to the loopback buffer on time.
If you got a long list of this, it was probably because the previous nodes didn’t send the audio data to aloop node. I think something stuck “vep node” at that time. You can monitor the CPU usage with “htop” and you will find 2 threads of this example rise to 100% before “underrun” happens. We are trying to avoid this “stuck”, and this example will still work after “underrun” happened.
Thanks,
Jerry