[linux-audio-user] Re: Help me set the volume for Freebob, please!

[Daniel Wagner]

> Although I am very satisfied with the pressure I was able to create, I
> do feel obliged to point out there is probably more wrong with my device
> than the low volume.

The volume setting test program is now functional. I haven't tested it 
listening to the output or input because I don't have a working 
environment right now but from what I see what's going on it looks good.

   wagi at newton:~/src/libfreebob/tests$ ./test-volume 0 1 -1000
   max volume value = 0
   min volume value = -32768
   old volume value = 0
   new volume value = -896

"The min and max attributes can range from 127.9922db (0x7ffe) down to 
-127.9961 dB (0x8001) in steps of 1/256 dB or 0.00390625 dB (0x0001). 
Code 0x8000 represents silence." AV/C Audio Subunit Specification 1.0

In reality the max value seems to be 0 (0 dB) and the minimum value 
-32768 (-inf dB, silence). The firmware will round the to something 
meaningful.

The FA-101 has only input feature function blocks. So you can't control 
the output level directly. I guess one can control that with the mixer 
(missing feature).

   wagi at newton:~/src/libfreebob/tests$ ./test-volume
   usage: NODE_ID FFB_ID VOL

Feature function blocks ids for the FA-101:

   Id 1: Input 1/2
   Id 2: Input 3/4
   Id 3: Input 5/6
   Id 4: Input 7/8
   Id 5: Input 9/10

The default values for the FA-101 are 0 dB so you don't seem to suffer 
from that problem...

cheers,
daniel