[LAD] USB device dmesg error

Good morning i'm trying to use a Roland R-26 as audio interface (USB). I saw it is now officially supported in the alsa-driver repo log: commit aa47d6014f7011b335345ce14836efe358b0cfe5 Author: Clemens Ladisch <clemens(a)ladisch.de> Date: Sun Mar 31 23:43:12 2013 +0200 ALSA: usb-audio: add support for many Roland/Yamaha devices Add quirks to detect the various vendor-specific descriptors used by Roland and Yamaha in most of their recent USB audio and MIDI devices. ... ... - Roland R-26 Recorder So i cloned the alsa-driver repo (branch release) and run ./gitcompile. Everything looks good and alsa force-reload worked. $ cat /proc/asound/version Advanced Linux Sound Architecture Driver Version 1.0.25. Compiled on Sep 2 2013 for kernel 3.2.0-39-lowlatency (SMP). When the device is plugged in and selected to act as an audio interface, dmesg says (debug=verbose): [ 5642.186130] usb 1-5.1: new high-speed USB device number 8 using ehci_hcd [ 5642.391666] snd-usb-audio: probe of 1-5.1:1.0 failed with error -5 [ 5642.392403] ALSA stream.c:711 >8:1:1: add audio endpoint 0xd [ 5642.392775] ALSA stream.c:711 >8:2:1: add audio endpoint 0x8e [ 5642.394385] usbcore: registered new interface driver snd-usb-audio $ lsusb | grep Roland Bus 001 Device 008: ID 0582:013e Roland Corp. $ cat /proc/asound/cards 0 [R26AUDIO ]: USB-Audio - R-26(AUDIO) Roland R-26(AUDIO) at usb-0000:00:0b.1-5.1, high speed After compile, there is a clear warning: WARNING!!! The mixer channels for the ALSA driver are muted by default!!! ************************************************************************** You would use some ALSA or OSS mixer to set the appropriate volume. -> alsamixer says "This sound device does not have any controls." so i can't unmute anything there. $ aplay a.wav Playing WAVE 'rabe_babe.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo -> there are no errors, but it stays like this (a.wav is a few seconds) forever and there is no volume indication "from PC" on the device. $ arecord -f cd b.wav Recording WAVE 'b.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo -> no errors but the file is empty (44 bytes), the device shows active mic level "to PC" It doesn't work for input or output but i guess it's near working. The only error is in dmesg (error -5 ?). Were could i go from here? Any hint is welcome Best regards, Thomas