
Use Tuner utility and plug-in in MainStage
You can tune instruments connected to your system with the Tuner utility or plug-in. This ensures that external instrument recordings are in tune with any software instruments, samples, or existing recordings in your projects.
If you're new to using plug-ins in MainStage, see Add and remove plug-ins in MainStage.

Tuner parameters
Graphic Tuning display: Indicates the pitch of the note in cents. At the centered (12 o’clock) position, the note is correctly tuned. If the indicator moves to the left of center, the note is flat. If the indicator moves to the right of center, the note is sharp. Color is also used to indicate tuning accuracy, with green denoting a tuned signal, and orange indicating a detuned signal.
Reference Tuning field: Drag vertically to set the pitch of the note used as the basis for tuning. The default is for note A at 440 Hz and can be set in a range from 410 to 470 in 0.1 Hz steps.
Keynote display: Shows the target pitch of the note being played (the closest tuned pitch).
Tune Deviation display: Shows the tuning deviation in cents.
Mute button: Silence the active channel.
View pop-up menu: Choose a Horizontal or Vertical display and set a size.
Note: You can also set a size by dragging the lower corners of the plug-in window.
Download the guides:
MainStage User Guide: Apple Books | PDF
MainStage Instruments: Apple Books | PDF
MainStage Effects: Apple Books | PDF