Grand Staff AU is an audio unit plug-in tuner for pianists, singers, and budding musicans. Shows single note on a Grand Staff. Hands-free operation, listens while you tune.

Requires an application that supports “Cocoa” Audio Unit plug-ins such as GarageBand, Logic Pro, Logic Express.

If you don’t have an application that supports “Cocoa” Audio Units plug-ins, you can try the application version of our tuners. Visit our Web site at www.rustykat.us.