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Sound tools, one job each.
Make a tone, name a tone, move chords to another key. Small tools for the moment you need to know what a sound is.
Some only play sound; the ones that listen open the microphone when you tap and close it when they have heard enough. Nothing is recorded or sent.
Each ends with a door into Brumm, where the notes become a melody over a running track.
Note frequency chartEvery note in hertz, C0 to B8. Tap one to hear it.earsTone generatorAny note or frequency, four waveforms, a sweep.earsTranspose chordsChords in, a new key out, heard first.earsWhat note is this?A kettle, a glass, a doorbell: its note and cents.micWine glass tunerTap a glass, add or pour off water, five notes.mic