embed videos into music
schedule videos in sequence
time offset into the video
export video with video clips
handle audio on wasm reload
download midiparts as json
wasm-git worker method for changing current song file
define song parts in code
embeddable song compiler (for use in smart contract)
generate song from function
docs on compressing png exported
karma: use localhost (for osx)
firefox: install and run pulseaudio for test