Rather than keep updating I have added the latest edits to code in a new file.

This version is complete except for Enter Key (play track) as I haven't decide which way to do it but even so, if you change the key mapping you have a media controller for any PC running any OS, simply remap the keys to suit...

Set: Volume, Bass, Treble (and Surround Sound if available on your player), select track to play (actual enter key requires work... not sure if I will use the long press or add a dedicated play button)...

Mike