I still don’t know what purpose pulseaudio serves, other than adding latency and making stuff less reliable.
PipeWire is better, but it turns out you can just use OSS under freebsd these days, and everything just works, but with lower latency.
If you have some sort of potato sound card that can’t mix output channels in hardware, note that OSS added sw mixing by 2007 (with support for 16 channels by default).
