Rigdio coder here. A new fix for Rigdio, RigDJ, and Riglevel is out. A glaring issue was found in Riglevel, QRD of it is that Riglevel's' detected sound level isn't the music's peak sound level but rather its average. Because of this, increasing the average level to the default value of -3 dBFS would make the song extremely loud with massive amounts of audio clipping.

This fix changes the following things:
- (Riglevel) Lowered the default audio level from -3.0 to -14.0 dBFS
- (Riglevel) Songs are normalized now while ensuring the change doesn't cause any audio clipping (go beyond 0 dBFS)
- (Riglevel) Normalized songs are now exported in .opus due to its better sound quality
- (Riglevel) Added .opus file support when opening songs
- (Riglevel) Added a tip in the UI to state that the target audio level is for the music's average loudness and not its peak
- (Rigdio) Changed the "song not found" error to show just the filename instead of the full path
- (Rigdio) Fixed a bug where the user can't play the home anthem if it's clicked first
- (RigDJ) Added .opus file support when opening songs

Thanks to an audiophile /vt/ anon for bringing the Riglevel problem to my attention and for giving me advice in regards to audio.
Link to the fixed version can be found on the Rigdio wiki page because 4chan doesn't let me paste Github links:
https://implyingrigged.info/wiki/Rigdio