Thanks Tarquin and Micha.
Yes, I'm sure the sound card remote is shown as HID device since it only appears when it is plugged in:
Vendor:1054, Product:12544, VersionNr:257, UsagePage:65280, Usage:0, ...
I have 2 HID remotes:
one comes from Sapphire 550Pro TV Card and it basically works.
another comes from Creative Audigy 4 Sound Card but it is not working at all.