I have found that the media and volume keys dont work with the default preset on the flirc usb with the skip 1s. I have currently fixed this by mixing the keys provided for the kodi profile to get these keys working (also nice as I get extra keys, even tho these map to keyboard keys) and the shiled profile for power, back and home. Also wanted to add this is a great device and I immediately bought as soon as I saw linux support and how active the development is.