Knob Lab offers a variety of ways
to connect and control
Bluetooth - Knob Lab connects to Mac clients via super efficient Bluetooth connection
USB - Connect directly to Mac clients using a USB cable
WiFi - Connect to PC or Mac clients using WiFi
MIDI Cable - Connect using an iOS device to MIDI cable to any MIDI receiving machine.
Virtual MIDI - Connect to any MIDI receiving iOS app
Audiobus 3 - Connect as a MIDI sender device to Audiobus and control other iOS apps.