blue-usu: (Search, Connect, Playback, Record) with bluetooth devices like headset.	  Rely on usu driver specialized for usb-bluetooth dongle.          Use GPL license.=== COMPILE PROGRAM ===makewill produce 3 program: ./blue, ./sco2raw, ./raw2sco.All this must be executed from same directory.=== USE: AUDIO RECORDING/PLAYBACK ===1) load usu module (see 'usu' USb ub User space on source forge)2) make; ./blue3) put your device in 'discovery mode',4) select 'search' on textual menu,5) select your device to connect with,First time you are requested to enter pin code.6) select 'quit'7) cat /proc/USBDo/isoc | ./sco2raw | sox -t raw -r 8000 -sw - isoc.wav to record8) sox isoc.wav -t raw -r 8000 -sw - | ./raw2sco > isoc.sco; cat isoc.sco > /proc/USBDo/isoc to playback9) ./blue10) disconnect from your device.Only 1 connection@time is supported.=== KNOWN PROBLEMS/COMMON MISTAKES === - some bt dongle do correctly connection, but when interact with isoc endpoint'll give BUFFER OVERFLOW error, - delete file {devices.txt, data.txt, currmac.bin} to clean blue 'memory'.