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Utility instruments in MainStage
The Utilities found in the instrument plug-in menu include:
External Instrument lets you route hardware MIDI sound generators through the Mixer, which you can then process with MainStage effects.
Klopfgeist is an instrument that provides a metronome click.
Test Oscillator can be used as an instrument or effect. It is used to calibrate tuning of studio equipment and instruments.
If you’re new to using plug-ins in MainStage, see Add and remove plug-ins in MainStage.