Hello, I'm only 3 months old newbie with Ubuntu/Linux, so please be gentle... I'm using Ubuntu 10.10 and I'm trying to use SoX with Jack audio driver. (while I'm using Jack for all the other audio applications) But SoX just won't output any sound. I've tried some options described in the manual (such as set AUDIODRIVER or play -t alsa....etc.)but it won't give me any errors, just not output audio. It's very frustrating. I can't even play an audio file... here's the information when I start my jackd with command: 'jackd -R -d alsa -s -r 48000 -X seq' Copyright 2001-2009 Paul Davis, Stephane Letz, Jack O'Quinn, Torben Hohn 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 Memory locking is unlimited - this is dangerous. You should probably alter the line: @audio - memlock unlimited in your /etc/limits.conf to read: @audio - memlock 737577 no message buffer overruns JACK compiled with System V SHM support. loading driver .. apparent rate = 48000 creating alsa driver ... hw:0|hw:0|1024|2|48000|0|0|nomon|swmeter|soft-mode|32bit control device hw:0 configuring for 48000Hz, period = 1024 frames (21.3 ms), buffer = 2 periods ALSA: final selected sample format for capture: 32bit integer little-endian ALSA: use 2 periods for capture ALSA: final selected sample format for playback: 32bit integer little-endian ALSA: use 2 periods for playback How can I run SoX command without quitting my jack environment? I'm using Supercollider with jackd, and my plan is manipulate my samples with SoX while I'm making music with supercollider. so it'll be crucial for me that I won't need to quit my current jackd environement optimized for supercollider... any help would be appreciated. thank you. -- Jae Ho YOUN http://jaehoyoun.com http://advancedsituation.com/