# Troubleshooting

- [The circle displays 4-note chords such as Gm7 or C△](/troubleshooting/the-circle-displays-4-note-chords-such-as-gm7-or-c.md)
- [The circle displays "H" instead of "B"](/troubleshooting/the-circle-displays-h-instead-of-b.md)
- [The app asks me to pay again](/troubleshooting/the-app-asks-me-to-pay-again.md): The app prompts me to pay even though I already paid to download it.
- [Wrong playback notes](/troubleshooting/wrong-playback-notes.md)
- [Only colors visible in the song](/troubleshooting/only-colors-visible-in-the-song.md)
- [Performance of app is slow](/troubleshooting/performance-of-app-is-slow.md)
- [Core-MIDI with Ableton Live](/troubleshooting/core-midi-with-ableton-live.md)
- [Reset the app to the initial state](/troubleshooting/reset-the-app-to-the-initial-state.md)