MIDI looper designed for live performances

Filter Program Change (PC) or Control Change (CC) events from MIDI files.

A Ruby library to send manufacturer-specific or instrument-specific MIDI messages

== Midi experiments

KuroMusic is midi controll library writed by ruby.

Quick and easy prototyping for Arduino-based MIDI pedalboards

Universally patch controller messages such as MIDI and OSC between devices

Ruby/IFF is a Ruby library for loading and serializing file formats based (more or less loosely) on the IFF standard; these include many popular file formats like MIDI and WAV

SMF is a "Standard MIDI File" module for an object-oriented scripting language Ruby.

Stretto is a Ruby implementation of JFugue, an open source library originally written in Java by David Koelle for programming MIDI.

This gem provides programmatic access to the Novation Launchpad MK2. LEDs can be lighted and button presses can be evaluated using launchpad's MIDI input/output.

Builds Audulus patches based on WAV, CSV, or MIDI file inputs

Inevitable Cacophony processes the musical form descriptions generated by Dwarf Fortress. It can parse a form to Ruby data structures, and in turn use that data to generate (simple) MIDI or WAV audio in that style.