Imports
- github.com/fogleman/gg
- golang.org/x/image/font
- gitlab.com/gomidi/midi/smf/smfreader
- gitlab.com/gomidi/midi/smf
- golang.org/x/image/font/basicfont
- gitlab.com/gomidi/midi/midimessage/channel
- golang.org/x/image/math/fixed
- gitlab.com/gomidi/midi/midimessage/meta
- gitlab.com/gomidi/smftrack