It’s 2018 and you can run Crysis on integrated graphics, but Linux still can’t play two sounds at the same time on anything.
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Pulse mixes everything. ALSA has dmix which can do the same but isn't enabled by default these days (because PA takes care of it). And PA usually has an ALSA plugin so *everything* should go to PA and get mixed by default.
If you have a really boneheaded legacy app that hardcodes the audio output device on ALSA or insists on direct hardware access then yeah, that will not work properly and will block other audio if there was nothing playing before.
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Makes perfect sense, thanks for confirming!
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Is there any way to block the boneheaded apps and just allow the mixing source?
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I don't think there's any way to block an app that *really* wants to directly open the hardware device (short of some really ugly nonstandard permissions hack). It only works while audio is idle, though, it won't "take over" pulseaudio if it's playing something.
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Linux audio is such a mess. This is why I like FreeBSD. /dev/dsp is a virtual device that many processes can open, and a kernel thread mixes it. Simple as pie and it just F'ing works.
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The fun part is, snd(4) is actually descended from an old version of OSS, but modified with stuff like Project X (studio-quality upscaler) and multi-channel multi-device I/O.
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Word. I even produce music on Linux. Sound problems are like 10 years gone now. But when people are told to remove Pulseaudio because old linuxers had have problems with it, you won't get the advantage of it. You can even add a jack-sink & play multiple PA sources & jack at once.
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Or add a headphone and a bluetooth speaker playing different streams at the same time.
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