I use Poweramp on an Android car radio and this is the most frustrating part of the interface. I use a Kensington trackball with a scroll ring that allows scrolling up and down, but this scroll feature does not work in anything other than settings menu. The only way to scroll through album, artist, song listings Etc is to do it manually on the touchscreen. The same goes when displaying lyrics. If there is any way that you can incorporate scrolling on the song lists, that will make Poweramp complete!