RIFF MIDI file

[Raffaello]

read a RIFF MIDI file format, is like a midi but embedded in a RIFF file.

[Raffaello]

it should be fairly trivial to implement as it is just a midi with a RIFF chunk. It might require some refactoring.

"The 'RMID' format consists of a standard MIDI file enclosed in a RIFF chunk. Enclosing the MIDI file in a 'RIFF' chunk allows the file to be consistently identified; for example, an 'INFO' list can be included in the file."
ref: https://www.loc.gov/preservation/digital/formats/fdd/fdd000120.shtml

RIFF-based MIDI File Format

Format Description for RMID -- Wrapper format for MIDI data.

[Raffaello]

extension should be ".RMI"