Hello everybody, after two nights of reading, trying I give up. My setting is a ESI Maya44 USB+ Audio interface, attached to a Raspberry Pi... The Audio Interface has 4 mono inputs and 4 mono outputs Basic sound works good, onboard sound chip is disabled by module blacklisting. The goal to achieve is mixing all four mono inputs together and route them simultaneous to atleast two of the outputs. I dont have a clue wether this can be done with pure Alsa or if this needs Jack...to be honest, i dont have a clue of the asound.conf/.asoundrc at all. Trial and error didnt make it aswell, as there is no error reporting of Alsa if anything is wrong. But maybe there is somebody who can help/give some hints... Thanks in advance! Manuel PS: attached are the outputs of: aplay -l : **** Liste der Hardware-Geräte (PLAYBACK) **** Karte 1: USB [MAYA44 USB+], Gerät 0: USB Audio [USB Audio] Sub-Geräte: 1/1 Sub-Gerät #0: subdevice #0 ----- aplay -L : null Discard all samples (playback) or generate zero samples (capture) jack JACK Audio Connection Kit pulse PulseAudio Sound Server output default:CARD=USB MAYA44 USB+, USB Audio Default Audio Device sysdefault:CARD=USB MAYA44 USB+, USB Audio Default Audio Device front:CARD=USB,DEV=0 MAYA44 USB+, USB Audio Front speakers surround21:CARD=USB,DEV=0 MAYA44 USB+, USB Audio 2.1 Surround output to Front and Subwoofer speakers surround40:CARD=USB,DEV=0 MAYA44 USB+, USB Audio 4.0 Surround output to Front and Rear speakers surround41:CARD=USB,DEV=0 MAYA44 USB+, USB Audio 4.1 Surround output to Front, Rear and Subwoofer speakers surround50:CARD=USB,DEV=0 MAYA44 USB+, USB Audio 5.0 Surround output to Front, Center and Rear speakers surround51:CARD=USB,DEV=0 MAYA44 USB+, USB Audio 5.1 Surround output to Front, Center, Rear and Subwoofer speakers surround71:CARD=USB,DEV=0 MAYA44 USB+, USB Audio 7.1 Surround output to Front, Center, Side, Rear and Woofer speakers iec958:CARD=USB,DEV=0 MAYA44 USB+, USB Audio IEC958 (S/PDIF) Digital Audio Output dmix:CARD=USB,DEV=0 MAYA44 USB+, USB Audio Direct sample mixing device dsnoop:CARD=USB,DEV=0 MAYA44 USB+, USB Audio Direct sample snooping device hw:CARD=USB,DEV=0 MAYA44 USB+, USB Audio Direct hardware device without any conversions plughw:CARD=USB,DEV=0 MAYA44 USB+, USB Audio Hardware device with all software conversions usbstream:CARD=USB MAYA44 USB+ USB Stream Output ---- cat /proc/asound/card1/usbmixer : USB Mixer: usb_id=0x25730008, ctrlif=0, ctlerr=0 Card: ESI Audiotechnik GmbH MAYA44 USB+ at usb-3f980000.usb-1.5, full speed Unit: 2 Control: name="Line Playback Volume", index=1 Info: id=2, control=2, cmask=0x3, channels=2, type="S16" Volume: min=0, max=255, dBmin=0, dBmax=99 Unit: 2 Control: name="Line Playback Switch", index=1 Info: id=2, control=1, cmask=0x0, channels=1, type="INV_BOOLEAN" Volume: min=0, max=1, dBmin=0, dBmax=0 Unit: 4 Control: name="Line Playback Volume", index=0 Info: id=4, control=2, cmask=0x3, channels=2, type="S16" Volume: min=0, max=255, dBmin=0, dBmax=99 Unit: 4 Control: name="Line Playback Switch", index=0 Info: id=4, control=1, cmask=0x0, channels=1, type="INV_BOOLEAN" Volume: min=0, max=1, dBmin=0, dBmax=0 Unit: 7 Control: name="Master Playback Volume", index=0 Info: id=7, control=2, cmask=0x3, channels=2, type="S16" Volume: min=0, max=255, dBmin=0, dBmax=99 Unit: 7 Control: name="Master Playback Switch", index=0 Info: id=7, control=1, cmask=0x0, channels=1, type="INV_BOOLEAN" Volume: min=0, max=1, dBmin=0, dBmax=0 Unit: 10 Control: name="Line Capture Volume", index=0 Info: id=10, control=2, cmask=0x3, channels=2, type="S16" Volume: min=0, max=255, dBmin=0, dBmax=99 Unit: 10 Control: name="Line Capture Switch", index=0 Info: id=10, control=1, cmask=0x0, channels=1, type="INV_BOOLEAN" Volume: min=0, max=1, dBmin=0, dBmax=0 _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user