Implementation of OPNMIDI based MIDI-player for Android

It's a MIDI-player based on emulator of a Frequency Modulation chip Yamaha OPN2 (YM2612). This small MIDI-player made with using of libOPNMIDI library.

• OPN2 emulation
• Customizable bank of FM patches (You have to use the bank editor to create own sound bank)
• Stereo sound
• Number of simulated OPN2 chips can be specified as 1-100 (maximum channels 600!)
• Pan (binary panning, i.e. left/right side on/off)
• Pitch-bender with adjustable range
• Vibrato that responds to RPN/NRPN parameters
• Sustain (a.k.a. Pedal hold) and Sostenuto enable/disable
• MIDI and RMI file support
• Real-Time MIDI API suppor
• MIDI and RMI file support
• loopStart / loopEnd tag support (Final Fantasy VII)
• 111-th controller based loop start (RPG-Maker)
• Use automatic arpeggio with chords to relieve channel pressure
• Support for multiple concurrent MIDI synthesizers (per-track device/port select FF 09 message), can be used to overcome 16 channel limit
• Partial support for GS and XG standards (having more instruments than in one 128:128 GM set and ability to use multiple channels for percussion purposes, and a support for some GS/XG exclusive controllers)
• CC74 "Brightness" affects a modulator scale (to simulate frequency cut-off on WT synths)
• Portamento support (CC5, CC37, and CC65)
• SysEx support that supports some generic, GS, and XG features
• Full-panning stereo option (works for emulators only)

https://github.com/Wohlstand/OPNMIDI-Player-Java/releases

• Recommended to have powerful CPU
• 4 MB free space

• Put APK to your Android device
• Check in settings that custom applications installations are allowed
• Open APK via any file manager and confirm installation
• Allow external storage reading (needed to open MIDI-files from phone memory and SD Card)

• Use "Open" button to open file dialog and select any MIDI, RMI or KAR file
• Setup any preferences (volume model, number of emulated chips, etc.)
• Press "Play/Pause" to start playing or press again to pause or resume
• Press "Restart" to begin playing of music from begin
• Use "Open" again to select any other music file
• You can switch another application or lock screen, music playing will work in background.

• This application audio playback may lag on various devices, therefore you can reduce number of emulated chips

More detailed about playing MIDI with this application you also can find on libOPNMIDI library repo