Bug#633761: [qjackctl] Fails to Set Output Device to HW:1

[Adrian Knoth]

tags 633761 moreinfo
thanks

On 07/13/2011 03:16 PM, David Baron wrote:

Hi!

> Package: qjackctl
> Version: 0.3.8-1
> Severity: normal
> 
> Changing the jack output device from the defaulted HW:0 to HW:1, a
> usb-audio device, has no effect. Jack still plays to HW:0.

I don't think that's true, at least not in general. Many people
(including) me can make jackd to be started on other than the first
audio device.

I hence assume a local configuration error on your side. Common mistake
is a hardcoded number of audio channels not present on the second card.
Simply omit them.

Likewise, for USB audio, choose three periods/buffer. You might also
want to enable the D-Bus interface option in the misc settings tab.

Last but not least: the message window gives you some indication what
went wrong.

Oh, and BTW: the correct ALSA device string is "hw:1", not "HW:1".

> Normal play to HW:0, a Intel/Realtek HDA builtin, will have 6
> channels. The audio connections box shows them. Only two
> (front-stereo) play.

Is this still part of the bug report?

Likewise, "hw:0" would be correct. Neither qjackctl nor jackd are
responsible for setting up your mixer. If the channels show up in the
connection window, then everything is correct from jackd/qjackctl's
side.

Run alsamixer -c 0 to configure the missing bits.



Cheers