Instruments
At the moment, Chordzy only supports MIDI instruments. You'll need a MIDI keyboard attached to your computer to use the app.
Midi-keyboards
Most MIDI keyboards connect via USB. However, Chordzy also supports Bluetooth & networked connection options.
Chordzy will synthesize your instrument (make sounds through your computer) as you play. If your keyboard has built-in audio output which you prefer, you can turn off/down the synthesizer volume in the Chordzy settings.
You can also pick from numerous different open-source/free synthesizers in the app. From grand pianos and electric keyboards all the way to bras and woodwind instruments, Chordzy has flexible audio output.