If you read the thread at alsa-devel - you refered to below - it seems that more people were facing this issue already in 2003.
It seems that the whole thing works only, if you use the default setting/routing.
Currently at factory default HDSPmixer routes the first playback channel to the first Adat output, which happens to sit right below playback out1/out2 in the HDSPmixer graphics.
Correspondingly this would mean I need to use an Alsaplayback channel out 13/14 to get to AN3+4. I think it is worth a try.
But - how do I output data to alsa-playback channel 13/14 on my device 0 ? I am using ecasound and alsaoutput 0,0 right now for out1/out2. No idea how to assign 13/14.
Since the earlier discussed amixer method won't work -- at least in my case - I am wondering if the commands
/usr/bin/amixer -c 0 cset numid=5 26,2,32768
/usr/bin/amixer -c 0 cset numid=5 27,3,32768
reflect the HDSP logic:
The logic in HDSPmixer to setup the route from Alsa Out1/Out2 to my AN3+4 output:
1. Assign playback channels Out1/Out2 to AN3+4 output channels. This will automatically mute playback channels out1/out2 . Now you need to unmute the playback channels.
Only this action will activate the new outputs. ( This you'll see if you look in the HW-output selection field)
The output channels AN3+AN4 themselves run at 100% or 0db at factory default. No need to touch them. However would be nice to know how to control these with amixer.
(Note: What's strange though playback output 15/16 is muted by default!?!)
Were not yet ready:
To get rid of a connection e.g. the default Adat routing, since now traffic is routed to AN3+4 AND Adat A1+2 you:
2. Select the Adat channels A1/A2 on playback channel Out1/Out2. Now you mute and then unmute manually playback channels Out1/Out2. Without this manual action nothing will change.
No idea how to do that with amixer.
The mute/unmute of playback outputs seem to play fundamental role in the routing process. Perhaps something in this area goes wrong. Again: Is there a way to explicitely control channel
volume with amixer?
( Beside that I figured that "mute" on MASTER and Playback Outs, does not work at all with HDSPmixer)
Cheers
\Klaus
On Fri, Oct 23, 2009 at 9:16 AM, Giso Grimm <gg3137@xxxxxxxxx> 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).
It is not defined in the .asoundrc, but on ALSA itself: Try "cat
Klaus Schulz wrote:
> 1. Could you please share your .asoundrc. I guess it is the .asoundrc
> where you set "DSP".
/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).
The mixer in the hdsp cards can control routing from hardware inputs to
> 2. 32768=0db refers to the playback controls, They run at 0db@32768
> and +6db@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.
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@xxxxxxxxxxxxxxxxxxxxx/msg06019.html
The channel numbering starts with zero. I do not know if the extension
> 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)
board uses the same channels as ADAT out, maybe try also channels 8-15.
Cheers!
Giso
_______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user
