Fwd: CSR chipset sco voice routing

Hi

This is regarding routing sco audio/voice from CSR USB chipset to ALSA.
I established HFP service connection establishment and made AT Commands
over the established connection. For routing the audio Does the CSR require
USB ISO audio driver for bluetooh?
SCO voice data is sniffed over hcidump.

Some chipsets like TIWILINK has pcm audio pins for direct connection to
audio codec. But USB chipset like CSR USB dongle to accept and route
audio/voice to the audio port/ALSA.
Does it require special audio driver?

Let me know what you think

Regards
Prasanna