[linux-audio-user] terratec aureon 5.1 usb and jack

Hi, recently I bought a Terratec Aureon 5.1 USB for my Thinkpad R32 (has an Intel 82801CA-ICH3 onboard). The Intel is card 0, the Terratec card 1. I have no problems playing some MP3s with xmms or "alsaplayer -d hw:1 -d 1024" (although I don't know why I have to use "-f 1024", I just played with the parameters) over the Terratec. But whenever I play through jack the sound begins to crackle, which is really annoying. Here are my module configurations: ,---- | alias char-major-116 snd | alias char-major-14 soundcore | | options snd major=116 cards_limit=4 | | # intel8x0 | alias sound-service-0-0 snd-mixer-oss | alias sound-service-0-1 snd-seq-oss | alias sound-service-0-3 snd-pcm-oss | alias sound-service-0-8 snd-seq-oss | alias sound-service-0-12 snd-pcm-oss | | # terratec aureon | alias sound-service-1-0 snd-mixer-oss | alias sound-service-1-3 snd-pcm-oss | alias sound-service-1-12 snd-pcm-oss | options snd-usb-audio vid=0x0ccd index=1 | | alias /dev/dsp* snd-pcm-oss | | alias snd-card-0 snd-intel8x0 | alias snd-card-1 snd-usb-audio | alias snd-card-2 snd-virmidi | alias snd-card-3 snd-usb-audio | | alias sound-slot-0 snd-card-0 | alias sound-slot-1 snd-card-1 `---- And here is how qjackctl starts jackd: ,----[ .jackdrc ] | /usr/bin/jackstart -R -dalsa -dhw:1 -r48000 -p256 -n2 -S `---- Jack output: ,---- | back from read, ret = 1 errno == Success | jackd 0.98.1 | Copyright 2001-2003 Paul Davis and others. | jackd comes with ABSOLUTELY NO WARRANTY | This is free software, and you are welcome to redistribute it | under certain conditions; see the file COPYING for details | | loading driver .. | apparent rate = 48000 | creating alsa driver ... hw:1|hw:1|256|2|48000|0|0|nomon|swmeter|-|16bit | control device hw:1 | configuring for 48000Hz, period = 256 frames, buffer = 2 periods `---- Kernel 2.4.25 with CAT_SETPCAP patch but no low latency patch. BTW, I have no crackling sound using jack with the Intel. Hopefully someone can help me with my problem. Sebastian