Debian Squeeze: connect to A2DP (bluetooth) through command line
 

I would like to turn my Lacie NAS into a A2DP bluetooth source, in order to stream audio to a bluetooth audio sink. The NAS runs Debian Squeeze in a chroot environment, and is connected to a Bluetooth dongle. I have no GUI installed on this NAS.

I can get bluetooth up with 'hciconfig hci0 up', and I can pair with the audio sink.

I created a file '~/.asoundrc' with the following contents:

pcm.btheadset {
type bluetooth
device C8:84:47:02:59:F4
profile “auto”
}

Then I executed 'hciconfig hci0 voice 0x0060', which gave no output.

After that, I executed

pactl load-module module-alsa-sink device=btheadset

which gave the following error:

socket(): Address family not supported by protocol
Connection failure: Connection refused

Did I skip a step? Or is there anything else to accomplish what I want?

UPDATE: I think the underlying problem is that the required kernel modules are not loaded. I have currently the following modules running:
snd_page_alloc
soundcore
btusb
uhci_hcd
rfcomm
l2cap
bluetooth
ftdi_sio
usbserial
usblp
ehci_hcd
loop
usb_storage
usbcore

Are there any other sound-specific kernel modules that I need to get sound over bluetooth working?