10.6

Table Of Contents
1003Logic Pro User Guide
The Devices pane contains the following preferences:
Core Audio Enabled checkbox: Enables the CoreAudio driver.
Output Device pop-up menu: Use to choose between any installed CoreAudio device,
including the internal sound hardware. This also includes aggregate audio devices,
consisting of several audio interfaces. See the Audio MIDI Setup Help for information on
aggregate devices.
Input Device pop-up menu: Use to choose between any installed CoreAudio device,
including the internal sound hardware. This also includes aggregate audio devices,
consisting of several audio interfaces. See the Audio MIDI Setup Help for information on
aggregate devices.
Note: When setting an output device that also provides inputs, the Input Device pop-up
menu changes accordingly. If choosing a different input device, you’ll be advised to use
a common Word Clock for both audio devices, in order to ensure the best sound quality.
I/O Buffer Size pop-up menu: Determines the size of the buffer used by the audio
hardware for both input and output. The smaller the buffer size, the less latency you
encounter when monitoring while recording, or using software instruments.
Some points to note:
As the value is reduced, a higher strain is placed on your computers processor or
processors.
There may be a point where the selected I/O buffer size is too small for your
computer, and begins to affect playback. This usually takes the form of clicks, pops,
and crackles in your audio.
You should aim for the lowest possible I/O buffer size value that doesn’t introduce
clicks, pops, and crackles in your audio.