JACK notes

ALSA handles hardware

Pulse Interconnects it.

Disable pulse starting before using JACK from startup menu

aplay -l to check alsa output channels

arecord -l alsa input channels

pactl list to check pulse

alsa info in /proc/asound

Can't see soundcards as user but can with root. Try adding user to audio group. Works

For each card run

alsa_in -d hw:0 Card0

alsa_out -d hw:0 Card0

These now appear in connect panel of qjackctl

"system" is the computer (I think)

way to test Alsa outputs: speaker-test -Dfront:AudioPCI_2 -c2 -twav

What keeps starting pulse?

disabled in startup applications

autospawn = no in both

~/.pulse/client.conf and /etc/pulse/client.conf

If it is killed it restarts.

This doesn't happen on the console Mate session only the X2go one

Must be started by X2go somehow

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Topic revision: r8 - 14 Jul 2020 - BarryGreen

 
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