OpenJay Forums

Terratec 5.1 USB && Linux - 2004/11/05 02:21

---

I buyed a Terratec 5.1 USB and I use it under Linux with very good results. Product has high quality and works great.

Cause I plug and unplug it a lot, I did not set up modules.conf and I'm used to type:

:arrow: modprobe snd-usb-audio

each time I plug it for the first time. Because I use it on a laptop with an Ali dsp on-board, Terratec becomes device 1 (not 0).

I never used it with Alsa with all channels running. This could be done using .asoundrc, but I fail to do this and I have few resons to do it. I use it with the Jack sound server starting it with:

:arrow: jackd -R -dalsa -dhw:1 -r48000 -p1024 -n4 -S

I can manage all the 6-mono channels without problems.

For setting the Terratec device in file modules.conf, you can use these lines:
:!: :!: :!:

alias char-major-116 snd
alias char-major-14 soundcore


# terratec aureon
alias sound-service-0-0 snd-mixer-oss
alias sound-service-0-3 snd-pcm-oss
alias sound-service-0-12 snd-pcm-oss
options snd-usb-audio vid=0x0ccd index=1

alias /dev/dsp* snd-pcm-oss

alias snd-card-0 snd-usb-audio
alias sound-slot-0 snd-card-0

:!: :!: :!:


This is enough to allow also OSS emulation. For .asoundrc explanation, I suggest the link:

http://www.alsa-project.org/alsa-doc/doc-php/asoundrc.php?company=Generic&card=Generic&chip=Generic&module=Generic

Hope will be useful...

Terratec 5.1 USB && Linux - 2004/11/05 09:52

---

[quote:c0ff449b0b="J_Zar"]I buyed a Terratec 5.1 USB and I use it under Linux with very good results. Product has high quality and works great.

...
I never used it with Alsa with all channels running. This could be done using .asoundrc, but I fail to do this and I have few resons to do it. I use it with the Jack sound server starting it with:

:arrow: jackd -R -dalsa -dhw:1 -r48000 -p1024 -n4 -S

I can manage all the 6-mono channels without problems.

...
Hope will be useful...[/quote:c0ff449b0b]

Ok, thank you very much. I'll try it tonight... but, do you know if is it possible to configure Alsa with all the channels?

I'll try with .asoundrc and, if I suceed, I'll post it.

bye,

ßingen

Terratec 5.1 USB && Linux - 2004/11/05 11:29

---

Sure it is possible to use 6 channel with Alsa. The problem is configuring with .asoundrc, that is not so clean and easy as configure method.

Another issue could be found programs using more channels: try your configuration with BpmDj and Mixxx.

:wink: :wink: :wink:

Terratec 5.1 USB && Linux - 2004/12/03 13:15

---

Hi again,

one more question about the configuration of the Terratec card with alsa: it's supossed that when you plug it in you shoul have in /proc/asound/card1 a directory for each channel, called pcmXp (playback) or pcmXc (capture), varying X. Do you have it? I don't, i just have one in and one out.
I case you have it, which kernel and which verision of alsa do you use?

Thanks.

ßingen.

Terratec 5.1 USB && Linux - 2004/12/03 14:47

---

About this:

http://www.alsa-project.org/alsa-doc/doc-php/asoundrc.php?company=Generic&card=Generic&chip=Generic&module=Generic#bindings

Each sound card has a number of physical channels 19 + 10. They are represented in /proc/asound/cardx as pcmXc (capture) and pcmXp (playback). Where X equals the number of the physical input/output (i/o) channels starting at 0.

(...)

You can assign the card any number of channels you want but you can only use as many channels as the card has physically available.

-----------------------

Although, i can see the six channels out with jack (with kernels 2.6.7 and 2.6.8.1), but it doesn't work fine, and hangs with mixxx and djplay. With kernel 2.6.9 doesn't work with jack (6 channels, 2 channels does).
I'm a little bit confused...

ßingen.

Terratec 5.1 USB && Linux - 2004/12/10 15:02

---

I'm actually not able to see my configuration under the /proc filesystem... cause I'm outdoor. Sorry!

I'm a little busy in these days (cause University) so you could see my posts are late.

I'll post my notes as soon I could put an eye into it... Ok? :wink:

Although: I'm using a 2.6.9 kernel and I tested the card only with Jack and Alsaplayer. I must say that Mixxx and DJplay are heavy applications, so it can be normal some clips. Need some work...

Ciao!