From mboxrd@z Thu Jan  1 00:00:00 1970
From: Clemens Ladisch <clemens@ladisch.de>
Subject: Re: snd_usb_audio - siberia elite prism soundcard
	issues
Date: Sun, 08 Mar 2015 20:02:08 +0100
Message-ID: <54FC9CB0.2030003@ladisch.de>
References: <CAHti5NHPMjxAtg_XLHD1kL4rUCAPaNGa_2ZAZwvv_Kc4u43uAw@mail.gmail.com>
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To: Daniel <dferradal@gmail.com>, alsa-devel@alsa-project.org
List-Id: alsa-devel@alsa-project.org

Daniel wrote:
> numid=1,iface=PCM,name='Capture Channel Map'
>   ; type=INTEGER,access=r----R--,values=2,min=0,max=36,step=0
>   : values=0,0
>   |     | chmap-fixed=FL,FR
> numid=2,iface=PCM,name='Playback Channel Map'
>   ; type=INTEGER,access=r----R--,values=2,min=0,max=36,step=0
>   : values=0,0
>   |     | chmap-fixed=FL,FR

This device reports that it supports two channels.
What makes you think that you can play eight channels?

> amixer: Control hw:2 element read error: Invalid argument
> usb 1-1.3: 10:0: cannot get min/max values for control 3 (id 10)
> usb 1-1.3: 2:1: cannot get freq at ep 0x1

These are bugs in the device firmware.  However, the driver could
handle them better.


Regards,
Clemens