An old PC used as an A2DP bluetooth receiver

Works for me with Linux Mint 12.

The tutorials I found explain the part where we must add

Enable=Source
in /etc/bluetooth/audio.conf

but I had a hard time to figure out that I had to modify /etc/pulse/default.pa and add
load-module module-switch-on-connect
load-module module-loopback

else the sink/source are not automatically connected.