My Ax is an X51V with A12 ROM, and I'm using the outstandingly brilliant Widcomm stack.
I also have two BT receivers, which are a Sony Ericsson MBR-100 (info
here) and a HouseParty Blu (info
here).
When I stream to either device using CorePlayer I can control the volume from my Axim.
When I stream using RealOne Player (which I have to for most of the BBC's Listen Again content) I can control volume when using the MBR-100, but not on the HouseParty.
Any ideas, anyone?
Cheers, Kronalias