M-audio fasttrack pro, input device index

M-audio fasttrack pro, input device index

[David Henningsson]

Hi,

M-Audio fasttrack pro has two stereo outputs and one stereo input. It 
looks like the input sometimes shows up at device 0 and sometimes at 
device 1. I e, a device string would sometimes be hw:1,0,0 and sometimes 
hw:1,1,0. (Assuming the card index is 1)

Do we know if there is a reason behind this behaviour, or should we just 
try both device strings?

I don't have this device myself, so I don't know if it's consistent 
given a specific physical device, if it differs between kernel versions, 
or anything else. I've just seen both.

Example alsa-info: 
https://launchpadlibrarian.net/45386782/alsa-info.txt.5TIcWGnRjL

-- 
David Henningsson, Canonical Ltd.
http://launchpad.net/~diwic

Re: M-audio fasttrack pro, input device index

[Clemens Ladisch]

David Henningsson wrote:
> M-Audio fasttrack pro has two stereo outputs and one stereo input.

It has two stereo inputs, analog and digital, one of which is disabled
depending on the device_setup module parameter.

> It looks like the input sometimes shows up at device 0 and sometimes at
> device 1.

This looks like a side effect of that hack.


Regards,
Clemens