[alsa-devel] [PATCH 0/5] Alsa: snd-usb: Improve M-Audio Fast Track Ultra mixer - v3

[Felix Homann]

2012/4/23 Mark Hills <mark at pogo.org.uk>:
> I can, but I'll need some assistance or documentation to explain how. I
> took a quick look, and it wasn't very clear.
>
> I presume this adds dB values to the mixer? Unless I have taken some
> measurements is it not better to leave them unassigned than add bogus
> values?

Yes, measurements would be great but I haven't done any measurements
on the FTUs either.

The TLV callbacks  I've added to the volume controls enhances the
usability of the controls anyway. Without the TLV callbacks I would
have to go to at least 90% in amixer etc. to hear anythin at all. With
TLV callbacks I can hear a difference all over the control range.

(Chances are, that the returned dB gain values are correct since the
devices opeerate nearly standard conform.)

Just try with your S16 controls like I did for the FTUs and see if it
makes a difference for you.

Regards,

Felix