Howtosignalprocessing
What is the MIDI I O of a audio interface for?
MIDI I/O – Onboard MIDI ports allow your audio interface to double as a MIDI interface. This can can save you the hassle of connecting and configuring additional peripherals to communicate with your MIDI devices. Digital I/O – Digital inputs and outputs allow you to expand your interface's available channels.
How do I get more outputs from audio interface?
To get more inputs – or outputs, in case the interface has an ADAT output – you need an extra preamp. Extra, because your interface already has one or more preamps on-board and will be handling its own set of microphones and/or line instruments like guitars, basses, keyboards and synths.
