I use a modern up-to-date system. It's a gentoo x86_64, kernel 2.6.25-r7 (alsa), KDE4.
I just installed rakarrack2 from svn, when I tried running it I got this error:
JACK compiled with System V SHM support.
loading driver ..
creating alsa driver ... hw:0|hw:0|1024|2|48000|0|0|nomon|swmeter|-|32bit
control device hw:0
the playback device "hw:0" is already in use. Please stop the application using it and run JACK again
cannot load driver module alsa
no message buffer overruns
Cannot make a jack client, is jackd running?
I don't know how to start jack properly. I tried "jackd -d alsa" but got this error:
control device hw:0
the playback device "hw:0" is already in use. Please stop the application using it and run JACK again
I tried "jackd -d alsa -C" and it started and ran, but when i ran rakarrack it made no difference to the sound of my guitar. I tried finding a solution in the jack documentation but to no avail.
I would very much appreciate it if anyone told me how to run jack so that it will work properly in rakarrack. Note that "hw:0 is busy", so if I have to use it, please tell me how to free it up.
Regards
DrSlony
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Jack is a realtime sound server... that means: if you want use jack you need to configure all the apps to use jack .. if you use KDE4 in the KDE Control Panel Sound you can set KDE4 apps to use jackd as sound server.
>I don't know how to start jack properly. I tried "jackd -d alsa" but got this error:
>control device hw:0
>the playback device "hw:0" is already in use. Please stop the application using it and run JACK again
Anyway you can see what applications are using your soundcard with the command:
lsof | grep /dev/snd
Stop this apps .... then start jack .. and then configure this apps to use jack.
The best way to run and configure jackd is using qjackctl .... I recommend to use with the lowest possible period. By default is set 1024 ...but with 256 or lowest you will have less latency with rakarrack.
If you have jack already run ..... you need to start the apss that want to use this jackd server as the same user who starts the server.
Greetings
Josep
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Hey
I use a modern up-to-date system. It's a gentoo x86_64, kernel 2.6.25-r7 (alsa), KDE4.
I just installed rakarrack2 from svn, when I tried running it I got this error:
JACK compiled with System V SHM support.
loading driver ..
creating alsa driver ... hw:0|hw:0|1024|2|48000|0|0|nomon|swmeter|-|32bit
control device hw:0
the playback device "hw:0" is already in use. Please stop the application using it and run JACK again
cannot load driver module alsa
no message buffer overruns
Cannot make a jack client, is jackd running?
I don't know how to start jack properly. I tried "jackd -d alsa" but got this error:
control device hw:0
the playback device "hw:0" is already in use. Please stop the application using it and run JACK again
I tried "jackd -d alsa -C" and it started and ran, but when i ran rakarrack it made no difference to the sound of my guitar. I tried finding a solution in the jack documentation but to no avail.
I would very much appreciate it if anyone told me how to run jack so that it will work properly in rakarrack. Note that "hw:0 is busy", so if I have to use it, please tell me how to free it up.
Regards
DrSlony
Hi
Jack is a realtime sound server... that means: if you want use jack you need to configure all the apps to use jack .. if you use KDE4 in the KDE Control Panel Sound you can set KDE4 apps to use jackd as sound server.
>I don't know how to start jack properly. I tried "jackd -d alsa" but got this error:
>control device hw:0
>the playback device "hw:0" is already in use. Please stop the application using it and run JACK again
Anyway you can see what applications are using your soundcard with the command:
lsof | grep /dev/snd
Stop this apps .... then start jack .. and then configure this apps to use jack.
The best way to run and configure jackd is using qjackctl .... I recommend to use with the lowest possible period. By default is set 1024 ...but with 256 or lowest you will have less latency with rakarrack.
If you have jack already run ..... you need to start the apss that want to use this jackd server as the same user who starts the server.
Greetings
Josep