10.6

313Logic Pro Effects
Use an external effects unit with I/O utility
1. In Logic Pro, connect an output of your audio interface with the input on your effects
unit, and connect the output of your effects unit with an input on your audio interface.
Note: These can be either analog or digital connections, depending on the features of
your audio interface and effects unit, and each connection can be either an output or
an output pair.
2. Click an Insert slot of an aux channel strip that is being used as a bus send/return, and
choose Utility > I/O.
3. In the I/O utility window, choose the Outputs and the Inputs of the audio hardware that
your effects unit is connected to.
4. Route the signals of any channel strips that you want to process to the bus (aux channel
strip) chosen in step 3, and set appropriate Send levels.
5. Adjust the Input Volume and Output Volume sliders as required in the I/O utility window.
6. Click the Latency Detection (Ping) button if you want to detect and compensate for any
delay between the selected output and input.
When you start playback, the signals of any channel strips routed to the aux channel
chosen in step 3 are processed by the external effects unit.
Logic Pro Multichannel Gain
Multichannel Gain allows you to independently control the gain and phase of each channel
in a surround mix.
Multichannel Gain parameters
• Master slider and field: Set the master gain for the combined channel output.
• Channel gain sliders and fields: Set the amount of gain for the respective channel.
• Phase Invert buttons: Invert the phase of the selected channel.
• Mute buttons: Mute the selected channel.