the instruments are out of tune

Hello Leisureit,

You can tune instruments with the MainStage Tuner. This page explains how to tune instruments with the MainStage Tuner: Tune guitars and other instruments with the MainStage Tuner

Tune an instrument using the Tuner

1. In MainStage, click the Tuner icon in the toolbar (or press Command-T).

The Tuner appears in the workspace.

Note: If you have a macOS device with a Touch Bar, you can press the Tuner button on the Touch Bar to activate the Tuner.

2. Play a single note on your instrument, and watch the Tuner display.

As you play, the Tuner shows the note name of the closest note. If the note is not in tune, red vertical bars appear, showing whether the note is sharp or flat. The bars appear to the right of the note name if the note is sharp, and to the left if the note is flat.

3. Adjust the tuning peg for the string you are tuning.

When the note is in tune, a blue vertical bar appears in the center, above the note name.

Be sure to play only a single note at a time while tuning. The Tuner can’t tune to a chord or interval or if you play different notes rapidly.

If you want to change the tuning for a concert in MainStage, please check out this link: Change the tuning for a concert in MainStage

Thanks!