Am Di 24. Februar 2009 schrieb Werner Almesberger: > Paul Fertser wrote: > > Following information is based on AN107 [1] (CSR, 2002, describes SCO > > configuration for BC-01b and BC-02-External) and experience. > > Please let me reveal myself as the total BT ignoramus that I am: > > Is the bottom line that unidirectional audio (A2DP) over USB to the > BT device works, but bidirectional audio (SCO) over USB doesn't ? yup, exactly.
> > And the reason for this is unknown, but you suspect an audio > routing issue in the BT module ? BT has USB interface and PCM interface. Seems there's no way to tell BT to accept audio data via USB in SCO (bidir) mode, though there is a way/command that *should* work to switch audio input source but doesn't apparently. Might be a bug in FW, or poorly or undocumented proprietary command needed. For A2DP mode (stereo output only) audio data is happily accepted on USB. Any document about details of actual FW used inside BT module would help a lot. Also asking manufacturer of module rsp chip might be worth a try. cheers jOERG
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