holy shit yall. i did it. i got rid of alsa_in/alsa_out. i now run jack directly on the ALSA device. i have achieved the holy grail of linux audio setups: * I can switch out devices on the fly * I have low enough latency for pro audio
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audio-setup <input-device> <output-device> hot-swaps the currently selected input and output device. it works from a clean slate with nothing running, it works if you hard-unplug a device and jack goes into a zombie state, and it works without restarting any applications.
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audio-cleanup to turn off the whole audio subsystem. this *also* preserves app state, so if you want to turn it back on again you *still* don't have to restart firefox. if you pass weird options and it crashes, *YOU STILL DON'T HAVE TO RESTART FIREFOX*
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I can open up bitwig or renoise and play my MIDI keyboard and it is *so responsive* it feels like playing an acoustic instrument. I can even pass `-o period 512` to my audio-setup script and it'll get even snappier. AND I CAN DO THIS WITHOUT RESTARTING FIREFOX
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I can play youtube videos and play my keyboard at the same time. I can do this and also unplug my laptop from its dock, run one script, and the VIDEO KEEPS PLAYING
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you don't understand i've been trying to get this to work for literally 6 years. SIX YEARS
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blog post forthcoming
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This is mainly about the neat JACK device switch trick, right? I think the PA on JACK part is a pretty common setup, I've been doing it for a long time (so PA apps survive JACK restarts). I've been meaning to write a blogpost about everything I've learned about Linux proaudio...
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Replying to @marcan42
yep! i thought it was impossible before because jackd would zombie out if you unplugged a device. but with jackdbus you can actually switch it out to the dummy backend, change the parameters, then switch it back
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even if it's zombied
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