[LAU] RME HDSP 9632 - amixer control

[Klaus Schulz]

Hi Giso and others.

I managed to get a basic routing working! I wrote a script which initializes
the entire matrix, connects one after another every input to every output
and plays a sound per setting.
I identified my alsainputs on 16/17 and analog outputs on 12/13 for my
analog extension board (out1 out2).

This has not very much to do with the channel assignment I've seen
everywhere.

With the script I can easily scan my setup now.

Finally I need to find out how to get more then 2 channels from Alsa to the
same card without using Jack.

The pity is really that I can not control the attenuation on the hw-outputs
with amixer. I'll do that on the application side.

THX for all the hints so far.

Cheers
\Klaus



On Fri, Oct 23, 2009 at 9:16 AM, Giso Grimm <gg3137 at vegri.net> wrote:

> Hi Klaus,
>
> I hope you don't mind that I copy the reply to LAU (there are a lot RME
> hdsp-users who probably know more about it that I do).
>
>
> Klaus Schulz wrote:
> > 1. Could you please share your .asoundrc. I guess it is the .asoundrc
> > where you set "DSP".
>
> It is not defined in the .asoundrc, but on ALSA itself: Try "cat
> /proc/asound/cards" and find out the ALSA-name of your card, e.g. here
> on my office PC it is:
>
>  0 [PAD            ]: Digi96 - RME Digi96/8 PAD
>                      RME Digi96/8 PAD at 0xfd000000, irq 21
>  1 [DSP            ]: H-DSP - Hammerfall DSP
>                      RME Hammerfall HDSP 9632 at 0xfeae0000, irq 21
>  2 [ICH5           ]: ICH4 - Intel ICH5
>                      Intel ICH5 with AD1985 at irq 17
>
> (the hdsp9652 is at home).
>
> > 2. 32768=0db  refers to the playback controls, They  run at 0db at 32768
> > and +6db at 64k
> >     However  this seems to be somewhat different on the ouptuts. 0db=max
> > position. I'd guess this should be 64k by default.
> >     Question: What do I actually control with below commands? I guess
> > the playback-inputs  only. How do I control the output channels?
> > Probably I need to set it to 0db to.
>
> The mixer in the hdsp cards can control routing from hardware inputs to
> hardware outputs (for 'zero' latency monitoring) and the software output
> to hardware outputs.
>
> Hardware inputs are channels 0-25, software outputs 26-51, hardware
> outputs 0-25. I don't think you can control the playback attenuation
> with amixer. It might be (but that is a guess) that hdspmixer attenuates
> the output channels only in software (by adding the output attenuation
> to all relevant input/playback channels); When controlling only via
> amixer I do not have to configure the output attenuation.
>
> The channel mapping is also discussed here:
>
> http://www.mail-archive.com/alsa-devel@lists.sourceforge.net/msg06019.html
>
> > 3. I tried without success:
> >
> > /usr/bin/amixer -c 0 cset numid=5 26,2,32768  #first playbackchannel to
> > first output of analog extension board (ch2)
> > /usr/bin/amixer -c 0 cset numid=5 27,3,32768  #first playbackchannel to
> > first output of analog extension board (ch3)
>
> The channel numbering starts with zero. I do not know if the extension
> board uses the same channels as ADAT out, maybe try also channels 8-15.
>
>
> Cheers!
>
> Giso
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.linuxaudio.org/pipermail/linux-audio-user/attachments/20091024/6c609e5b/attachment.htm