online midi

best free online synthesizer -- play over 128 instruments (pianos, drum pads, guitars, organs, & more) and beats with your keyboard or touchscreen.

onlinemidi.com is the only complete online midi editor and player. includes tracks by post malone, queen, beatles, led zeppelin, and pink floyd. control a video player with midi messages. output to mp3 or wav audio files, and import audio files and map them to midi notes. add drum loops, reverb, 3-band eq, adsr envelopes, low-pass filters, and lfo modulators. it allows any synth to play 48 microtones per octave. edit the pitch, velocity, and duration of every midi event. copy, transpose, change durations, and change velocities for notes in any time range. add controllers and pitch bends, and create a series of controllers in any time range.