With FreeBSD 11.1, using OSS, I run into the problem that if “too many” applications which produce sound output, or even “too many” tabs of YouTube in Firefox, are open, some of them will not output any sound. “too many” can be as low as two – it varies.
mpv, for example, in such cases gives the following error:
[ao/oss] Can't open audio device /dev/dsp: Device busy [ao] Failed to initialize audio driver 'oss' Could not open/initialize audio device -> no sound.
Do you know any way to fix this?