I/O Utility

The I/O utility enables the use of external audio effects units, similar to the use of internal Logic Express effects.

Note: In practical terms, this makes sense only if you are using an audio interface that provides discrete inputs and outputs (analog or digital) that are used to send signals to and from the external audio effects unit.

Figure. I/O window.
To integrate and use an external effects unit with the I/O utility
  1. Connect an output (or output pair) of your audio interface with the input (pair) on your effects unit. Connect the output (or output pair) of your effects unit with an input (pair) on your audio interface.

    Note: These can be either analog or digital connections if your audio interface and effects unit are equipped with either, or both.

  2. Click an Insert slot of an aux channel strip (being used as a bus send/return), and choose Utility > I/O.

  3. In the I/O window, choose both the Outputs and Inputs of your 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 or Output volume as required in the I/O 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) will be processed by the external effects unit.