The Project

• This app imitates the software UI of a DJ controller or MPC (MIDI Production Controller).

The Interface

• Each track can play up to 2 instruments.
• A gray box represents an empty track, where 2 instruments can be added.
• An instrument can be added or removed from a track by clicking the "+" or "-" button.
• A track can be added by clicking the "Add Track" button.
• The most recent track can be stopped with the "Stop Track" button.

The Funk-tionality

• Each new instrument will be added to the first track playing no instruments.
• If each track is playing at least 1 instrument, the next instrument will be added to the first track playing only 1 instrument.
• When stopping a track, the instruments will be added to open tracks, using the above logic.
• If a track cannot be found for all of the stopped track's instruments, they will be removed from the interface.