Thank you for that advice! It worked!   I do exclusively use the STX outputs (the headphone-out and the front-out with an amp and speakers).   ALso I just discovered Audiophile Linux  http://www.ap-linux.com/

I guess you're right... hmmm

I think everything is hooked up properly. When I leave the field "output device" empty I can listen through the STX's headphone jack.

yes, I tried 3,1. Same Error!?

Hi,   I read through most of this long and very helpful thread, but in gmusicbrowser, when I set the "Alsa Device" to use the Xonar STX to "hw:3,0" (I use headphones) it does not work and gives the Error message: "Playing error: Configured audiosink alsa is not working. at...

Following your post I had to give it a thought and do some reading. So, I posted a new queation in a new thread here http://www.head-fi.org/t/694216/hd600-with-magni-modi-o2-odac-or-stx-zxr

Ok, after I got one clear answer from SgtMattBaker here http://www.head-fi.org/t/691115/hd600-driven-by-denon-pma-920-class-a-stereo-amp-what-am-i-to-expect, I had to think it all over:   Which of the following should give me the  best results with my HD600: - SHIIT Magni + Modi - JDS Labs...

Hi, Many thanks in advance for any help with this:   To drive Sennheiser's HD600 (or maybe HD650 if the combo is preferable), I was considering an Objective2 headphone amplifier by JDS Lab. But I have two stereo amps at hand, a Denon PMA-920, and a Luxman A-357. Out of the possible...