octave

When I write for tuba, I sing all of the melodic parts and I transcribe them maybe three or four octaves down.

The A, D and G strings are all tuned an octave higher than a standard guitar, adding a new level of tonality.

It became a defining song for the genre, marrying Thomas's gospel-trained, four octave vocals to a pulsing electronic beat.

May said, her voice going up several octaves.

This excitation triggers the generation of harmonic electronic states that give rise to single photons -- similar to how musical harmonics produce notes across multiple octaves.