powertabeditor - request for PKGBUILD review

Hi, this is my first time creating a PKGBUILD. I tried to follow the guidelines and the recommended practices for cmake packages, but not sure I didn't miss something. Thanks for any suggestions. I checked that it builds in clean chroot. The software seems to work well, except for JACK server not running error (for playback of midi). I am not sure if this should be somehow solved in the PKGBUILD, or if it should be left to the user. When I run qsynth alongside the powertabeditor the playback works just fine. Somehow setting up timidity++ daemon would work too, I guess. Best regards, Jonas Serych