FarPlay doesn’t currently transmit MIDI data. The easiest solution is to connect an instrument cable from a line output on your keyboard to a line input on your audio interface (use two cables for stereo). Alternatively, you can use Logic Pro or another digital audio workstation (DAW) to generate the audio for your keyboard and route the audio from your DAW to FarPlay using a virtual sound card (Blackhole and Rogue Amoeba Loopback are popular choices on Mac—getting a satisfying result on Windows is difficult) or the loopback feature built into your audio interface (not available on all audio interfaces). Visit https://farplay.io/audio-from-another-app/#fromdaw for more information.