[LAU] Scarllet 8i6 on Ubuntu Studio

[Robin Gareus]

[message re-arrange to avoid top-posting]
On 05/21/2013 04:52 PM, Axax wrote:
> On 05/21/2013 09:30 AM, Abhayadev S wrote:
>> Hi,
>>
>> Anybody had tried using the Focusrite Scarllet 8i6 on Ubuntu Studio
>> 13.04?
>>
>> So far it was not supported under ALSA but from 13.04 it seems it is
>> been detected and the JACK is able to list out couple of I/Os.
>>
>> Last day i just booted up a live version of the 13.04 and was bale to
>> do couple of i/o routing. Jack lists 8 inputs and 12 outputs. It seems
>> the Inputs 1 to 4 (analog mic/line-ins) are listed as Inpiuts 1 to 4
>> and 2 SPDIF are 5 and 6. But i am not sure about the 7 and 8. I am
>> getting the same SPDIF signal on these inputs too !
>> The output 1 to 4 are Monitors output (1&2) and extra outputs (3&4) on
>> the backside of the box. And 5&6 seems to be SPDIF outputs. Still have
>> 6 more outputs to be listed/clarified.
>>
>> Just going ahead with further analysis and if anybody out there has
>> any thing to add on please do so..
>>
>> Regards,
>> Abhayadev S
>> http://sites.google.com/site/abhayadevs
>> http://sites.google.com/site/astudioindia
>>

> Hi,
>
> I've the same audio card. It's working as you described, but I can't
> figure out hot to change the input mode for the channels 1-2 from MIC to
> LINE/instr!
> Anybody have a clue?
>
> A.
>

see
https://focusritedevelopmentteam.wordpress.com/2012/04/23/linux-and-focusrite-novation-products/#comment-51

https://github.com/x42/alsa-driver/tree/s18i6  adds full mixer support
for the 18i6. According to Focusrite the same will also work for the 8i6
-- but I lost interest in Focusrite devices for various reasons.


Short of patching the alsa kernel driver or using another OS to change
device config, you can use https://github.com/x42/scarlettmixer to
change the config on GNU/Linux. It's not a ready-to-use app, however:

1) rmmod snd_usb_audio  # so that python script can access the device
2) change the python script line 31 to detect the 8i6
3) tweak the "example code" line 492..
  the "line/inst" switch is there as sw_impedance()
4) modprobe snd_usb_audio # ...

best,
robin