Apple MainStage 3 - Manual (Page 150)

Appendix C MainStage preferences 150
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Alert me: Displays an alert when a device is hot-plugged. The alert includes buttons allowing
you to use or ignore the device.
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Automatically Use Device: Switches the audio drivers to allow immediate use of the hot-
plugged device for audio input and output.
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Do Nothing: Does not switch the audio drivers.
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Display audio engine overload message checkbox: When selected, an alert appears when the
audio engine overloads.
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Enable ReWire Host Support: When selected, MainStage functions as a ReWire host. MainStage
must be reopened in order to detect ReWire slave applications.
Advanced Settings
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I/O Buffer Size pop-up menu: Choose the size of the buffer for audio input and output in
samples. Smaller buffer sizes reduce the amount of latency, but also require more work from
the CPU and may result in playback artifacts. You may want to try different settings to find the
lowest setting that does not produce any artifacts.
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I/O Safety Buffer checkbox: When selected, MainStage uses an additional buffer to process audio
output streams, providing a safeguard against crackling noises that may occur when using
very low I/O Buffer Size settings. If turning on this preference does not improve things on your
system, disable the checkbox and select a larger I/O buffer size setting.
Note: Use of the I/O Safety Buffer preference increases the output latency and therefore the
round trip (input plus output) latency.
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Driver Latency slider: Drag the slider to set the amount of latency. Drag left to decrease the
amount of latency, or drag right to increase the amount of safety (may increase latency).
The latency for the current buffer size is displayed below the Driver Latency slider.
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CPU Usage slider: Drag the slider to set the amount of processor power devoted to audio
processing. For multi-core processors, this controls the number of cores devoted to
audio processing.
Recording
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Output pop-up menu: Choose the audio output to record.
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Recordings Folder field: Click the field, then browse to choose the location where recordings are
saved. The file path of the chosen location appears in the field.
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File Format pop-up menu: Choose the file format for audio recordings. The choices are:
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AIFF
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CAF
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WAVE
Audio Channel Strips
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Silence Previous Patch pop-up menu: Choose the amount of time sustaining notes and effects
tails continue to sound before falling to silence when you select a new patch.
The Silence Previous Patch preference applies only to audio and external instrument channel
strips, not software instrument channel strips.
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Globally Disable Feedback Protection checkbox: When selected, feedback protection is disabled
for all audio and external instrument channel strips in all concerts. The Feedback Protection
checkbox is also removed from the Attributes tab in the Channel Strip Inspector.