Hello all, First of all, googling I found an email that describes exactly the problem I have right now: http://www.mail-archive.com/pulseaudio-discuss at mail.0pointer.de/msg04635.html The summary in command line style: pi at raspberrypi ~ $ cat /etc/asound.conf ctl.equal { type equal; library "/usr/lib/ladspa/cmt.so"; module "fbdelay_5s"; } pcm.plugequal { type equal; slave.pcm "plughw:0,0"; library "/usr/lib/ladspa/cmt.so"; module "fbdelay_5s"; } pcm.equal { type plug; slave.pcm plugequal; } pi at raspberrypi ~ $ aplay -Dequal piano2.wav Playing WAVE 'piano2.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo (sounds like it should) pi at raspberrypi ~ $ pactl load-module module-alsa-sink device=equal Failure: Module initialization failed Nothing in the syslog... Back then in 2009 ALSA was blamed but I was hoping that this would have been solved meanwhile. Is this the case? Am I missing something else? Alsa-base: 1.0.25+2+nmu2 Pulseaudio: 2.0-6.1 Thanks! - bram -- http://www.samplesumo.com http://www.freesound.org http://www.smartelectronix.com http://www.musicdsp.org office: +32 (0) 9 335 59 25 mobile: +32 (0) 484 154 730