Imports
- github.com/gomidi/midi/midimessage/channel
- github.com/gomidi/midi/midimessage/meta
- github.com/gomidi/midi/smf
- github.com/gomidi/midi/smf/smfwriter
- github.com/mjibson/go-dsp/fft
- github.com/mjibson/go-dsp/spectral
- github.com/mjibson/go-dsp/wav
- github.com/mjibson/go-dsp/window
- github.com/urfave/cli