problem with audio dropouts

Stefan314 · Joined: Feb 14, 2023 Posts: 1 Location: Switzerland

I'm using ChucK on Ubuntu focal and the standard ChucK version 1.2.0.8 for my distribution is reporting (via rtaudio): no devices found for compiled audio APIs! So, I built the tag chuck-1.4.2.0 from https://github.com/ccrma/chuck using make linux-pulse.

It works in general, but when I send many oscillators (e.g. 1024) simultaneously to dac, I regularly get short audio dropouts. These audio dropouts do not occur when I generate a WAV file using examples/basic/rec.ck and then play it back (also through pulseaudio). Increasing --bufsize xy doesn't help, as while it reduces the occurrence of dropouts, the remaining ones become longer in duration. The system load is negligible during playback. I have checked journalctl -f -t pulseaudio with debug logging and the content is similar to playing the wav file.

What am I doing wrong?

Perhaps I should add that there are also audio dropouts with a single SinOsc, but these are much less frequent and shorter in duration. Here's a recording with my mobile of