[LAU] Please help with audio interfaces that keep changing after reboot

david gnome at hawaii.rr.com
Sat May 8 23:26:14 UTC 2010


Jeremy wrote:
> david wrote:
>> Jeremy wrote:
>>> Philipp wrote:
>>>> Excerpts from Geoff King's message of 2010-05-08 01:17:39 +0200:
>>>>> Hello,
>>>>> I have problem that I've been trying to figure out with no luck.  The
>>>>> audio interface keeps changing for example:
>>>>>
>>>>> Today:  Maudio 24/96 is hw:1 and Midisport 4x4 Anniv is hw:0.
>>>>> Yesterday before reboot: Maudio 24/96 is hw:0 and Midisport 4x4
>>>>> Anniv is hw:1
>>>>> etc, back and forth, each reboot...
>>>>> I usually use qjackctl and have to keep changing the presets with
>>>>> settings which is annoying.
>>>>>
>>>>> I would greatly appreciate it if someone could provide me some clues
>>>>> or links on how to fix this?
>>>>>
>>>>> I'm Using Fedora 12 w CCRMA.
>>>>>
>>>>> thanks, Geoff
>>>> The easiest solution might be, using my setup as example:
>>>>
>>>> aplay -l
>>>> **** List of PLAYBACK Hardware Devices ****
>>>> card 0: UA25 [UA-25], device 0: USB Audio [USB Audio]
>>>>   Subdevices: 0/1
>>>>   Subdevice #0: subdevice #0
>>>> card 1: Intel [HDA Intel], device 0: ALC268 Analog [ALC268 Analog]
>>>>   Subdevices: 1/1
>>>>   Subdevice #0: subdevice #0
>>>>
>>>> So I use hw:UA25 in jack instead of hw:0
>>>> Jack always uses this device if it can find it, it always just works.
>>>> If you have multiple other devices you need hardwired you might need
>>>> some other trickery, but I guess in your case it's a simple matter of
>>>> figuring out the right name for the maudio interface.
>>> And maybe it's helpful to mention that you have to enter the cardname
>>> manually in QJackCtl the very first time you configure it this way, you
>>> can't select it. Out of my head the cardname for a M-Audio 24/96 is
>>> 'M2496' so in QJackCtl you can try 'hw:M2496' in the Interfaces field
>>> (without the quotes of course).
>> The one on my laptop is "USB Audio Codec". QJackCTL won't accept it,
>> name has spaces ...
>>
> 
> Then your card name is probably 'default' and QJackCtl should accept
> 'hw:default' then.

QJackCtl accepted it, but this morning the system appears to think 
"default" is the builtin Intel audio. Well, "aplay -l" still reports 
that default is "USB Audio Codec," but with JACK set to play using 
"default", sound went through the Intel audio.

-- 
David
gnome at hawaii.rr.com
authenticity, honesty, community


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