From the ALSA wiki
This audio product is now discontinued and can hardly be found in stores. It was replaced by Terratec Aureon 5.1 USB MK.2. You may find it on eBay.
Terratec offers passive support for GNU/Linux. It is a recommended choice for people needing good sound quality, without investing in a professional sound card.
This card is a two-way audio card with USB-1 support.
To drive this card at low latencies, some things need to be done. Thanks to the infos of Clemens Ladisch, do the following to get latencies of about 13msecs (less will be possible but will lead to audible xruns):
- In the kernel config ensure that both options (taken from a 2.6.10)
[ ] Enforce USB bandwidth allocation (EXPERIMENTAL) [ ] Dynamic USB minor allocation (EXPERIMENTAL)
- are disabled.
- Ensure to load the snd-usb-audio module with the parameter "nrpacks=1", maybe including it into one of the boot scripts:
modprobe snd-usb-audio nrpacks=1
- Now invoke JACK with the following command:
jackd -R -P89 -dalsa -dhw:2 -r48000 -p256 -n3 -S
- or entering the corresponding values into Qjackctl