Jack can only use a single device (hw:1,0). it cannot use 2 separate stereodevices as one 4 channel device.
However...see here for one possible answer (using alsa multi plugin)
http://www.alsa-project.org/alsa-doc/alsa-lib/pcm_plugins.html
Look for section "Plugin: Multiple streams to One"
also this
http://alsa.opensrc.org/index.php/.asoundrc#Joining_devices_to_make_multichannel
I modified this .asoundrc to join 2 devices instead of 2 subdevices. Seems to work (couldn't test properly yet). Thanks a lot for the hint. I'll post more info tomorrow (almost 4am here, gotta get some sleep).
Rodrigo Rodrigues da Silva
Engenharia de Computação - Coop8
"Free software is defined as software that respects four fundamental freedoms: (0) freedom to run the software as you wish, (1) freedom to study the source code and modify it to do what you wish, (2) freedom to make and redistribute copies, and (3) freedom to publish modified versions." Richard Stallman
"Não importa como morre o home, importa como vive." Carijó, velho do rio.
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