[alsa-devel] Problem recording from an RME Hammerfall DSP 9632

Lars Magne Ingebrigtsen larsi at gnus.org
Sun Feb 22 16:33:20 CET 2009

At least that's what I think I have.  lspci says:

00:08.0 Multimedia audio controller: Xilinx Corporation RME Hammerfall DSP (rev 97)

Playback works just fine, and analogue input works as well.  With
hdspmixer I'm able to route the analogue input to the SPDIF outputs,
and I'm able to control the volume of the playback via amixer:

[larsi at rocket-sam /tmp]$ amixer cset numid=5 16,8,32768
  ; type=INTEGER,access=rw------,values=3,min=0,max=65536,step=1
  : values=0,0,0
$ amixer cset numid=5 17,9,32768


So playback and routing from inputs to outputs works as expected.

However, I'm not able to record anything.

$ arecord -t raw -r 44100 -c 2 -f S16_LE | od
Recording raw data 'stdin' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
0000000 000000 000000 000000 000000 000000 000000 000000 000000

So I'm getting output from the capture device -- but it's all zeroes.

I've tried using amixer to route everything to everything else, but that
doesn't have any effect for arecord, either.

What am I missing?

(domestic pets only, the antidote for overdose, milk.)
  larsi at gnus.org * Lars Magne Ingebrigtsen

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