Re: Issue starting JACK

[email protected]
Newsgroups gmane.linux.alsa.user
Message-ID <[email protected]>
On 2020-07-14 03:29, Nathan Dehnel wrote:
> Ok. Here is the output:
> 

Start alsamixer, Then press F6,  write down the devices that is listed 
there and report them back to me.
They should be the same as aplay-l
In alsamixer select interface that you used in the jackd string.
then do F5
Do you see inputs and outputs ?
If not the interface was recognized but probably incorrectly.
Cycle through with F6 F5 untill one of the options gives you inputs and 
outputs with F5.

then use aplay -l at cli to find the moniker you have to add to the 
jackd string and try the jackd string again.

Remember you need to start the jackd string I gave you from user account 
not root.
I am not sure where you started it from.

A succesfull jackd string has output as follows.


:~$ /usr/bin/jackd --sync -P80 -ndefault -dalsa -dhw:UMC1820 -r441
jackdmp 1.9.12
Copyright 2001-2005 Paul Davis and others.
Copyright 2004-2016 Grame.
Copyright 2016-2018 Filipe Coelho.
jackdmp comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details
JACK server starting in realtime mode with priority 80
self-connect-mode is "Don't restrict self connect requests"
audio_reservation_init
Acquire audio card Audio1
creating alsa driver ... 
hw:UMC1820|hw:UMC1820|1024|2|441|0|0|nomon|swmeter|-|32bit
configuring for 441Hz, period = 1024 frames (2322.0 ms), buffer = 2 
periods
ALSA: final selected sample format for capture: 32bit integer 
little-endian
ALSA: use 2 periods for capture
ALSA: final selected sample format for playback: 24bit little-endian in 
3bytes format
ALSA: use 2 periods for playback
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