6.5Selecting Input Type, Gain, and Phantom Power
Just above the labels for input channels 2-4, is a slider that allows you to select either Line or Mic as the input. For input channel 1, which is the master channel, you can also select AES as the input type.
AES stands for Audio Engineering Society 3, a standard for the exchange of digital audio signals between professional audio devices.
For both Mic and Line input, you can adjust the Input Gain dial and select if the microphone will use phantom power. Phantom power is electrical power that is sent to a condenser mic through its mic cable. +15 phantom power is available on a 3-pin phantom connector or the XLR connector. Phantom power cannot be enabled when Line input is selected.