Jan 17, 2019

- Fix bug
- Fix server
- Fix IAP
- Dual piano keyboard with full feature
- Label for Piano Key
- Challenge mode
- Repeat A->B
- Add support more device
- Fix style
- Instrument Store
- New style
- Save downloaded MIDI file to external storage
- Read and Playback recordings from external storage
- Load MIDI file to external storage to play on virtual piano (on app) or real piano device (MIDI Keyboard) with USB OTG Cable/MIDI Cable