Routing Audio Digitally Between iOS Devices

People frequently wonder if there is a way to route audio from one iDevice to another while keeping the audio in the digital domain.

In one AB Forum thread a few options have been mentioned:

• a multi-device interface such as this the iconnectmidi4plus
• two audio interfaces that have digital input/output options. Some interfaces, for instance, provide ADAT Lightpipe or TOSLINK input and output which provides 8 channels of digital audio.