Tap tempo
Tap along and read the tempo in beats per minute — with the Italian marking that goes with it.
At least four taps; the average of the last eight is used.
Anotona does this for you
Photograph a page of sheet music or play the melody — Anotona finds the key, engraves the notes and transposes them into any other. Free.
See AnotonaEvery note on this page is computed, not typed in — following the rule that also makes F# major spell its seventh degree E#, not F.