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Visual Music is an upcoming iOS app that leverages Dr. Heerems's PhD research to create a tool that helps musicians to play and sing better.

In the screen below, a bassoonist is playing a scale. The lower part of the screen shows whether the note is being played on pitch. You can see tat the third note is sharp (too high).

 

Visual Music lets you see how your pitch varies over the course of a note.

 

You can also generate arbitray sounds and analyze them.