I am now able to capture IR remote events. They turn up on the PC2 device. Which is kind of weird because the USB is not connected to that. This means they're using the data return path on the... HDMI port for the panel!?
The B&O PC2 used to be a standalone product, some time in the late 90s, that attached to a PC with a jack and a USB cable, and local active speakers via B&Os own 8-pin DIN, which carries stereo, power on/off and a simple data signal for the speaker displays.
It would enable you to use your PCs own MP3 library with a Beolink integrated setup. Now, this all really began when I got a finn.no deal on three Beomedia 1 devices, that I kind of wanted to play with:
But that project kind of stranded when I concluded that it would not be possible to set it into audio master mode (as opposed to an audio slave, ie a secondary audio source which does not do bus arbitration, or a link unit, typically speakers in a different room), because the controller on the thing is too intelligent and figures out addressing itself; I did not get interrupts for data the board felt did not concern me.
However, the Beomaster 5 USB device presents itself as a PC2 as well - and that does do audio master mode. The best thing would be if there actually is no revision difference here, and I can use even a Beolink PC2 as a bus master if I figure out how the software sets the flags appropriately.
Then I would be able to hack together a solution to use a standalone Beolink PC2 as a Wifi audio bridge, for instance, and still gain the super-pleasant B&O UX without the need to have cables professionally installed (and without having to shell out 40 000 NOK or whatever to get Spotify integration with the remote)