[alsa-devel] snd-usb-audio issues??

Richard Storer rstorer at ntlworld.com
Mon Apr 14 15:51:23 CEST 2014

>From what I can tell with the Windows driver Mic-In and Line-In share
the same mixer slider control, this may explain why only 1 capture
control appears under Linux.
I have tried adjusting the Mic levels while capturing audio but only
the Mic levels change the Line-In levels do not change at all.

Could this be confusing the driver somehow??

Richard S.

On 14/04/2014, Clemens Ladisch <clemens at ladisch.de> wrote:
> Richard Storer wrote:
>>         bTerminalID             4
>>         wTerminalType      0x0603 Line Connector
>>         bDescriptorSubtype      6 (FEATURE_UNIT)
>>         bUnitID                 5
>>         bSourceID               4
>>         bmaControls( 0)      0x02
>>           Volume Control
> That single capture mixer control controls the line input.
> (I don't know why it's labelled as "Mic", or how the device
> switches between mic and line signal levels.)
> Regards,
> Clemens

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