Octave looks sort of uncertain - he honestly doesn't know for sure. He'll say as much, and then spend a minute considering it.
"Every soul's got a sound, you know? A specific pitch. We know that much. It seems like both labels equate them to colours. Spectrum of sound, spectrum of color. Couldn't tell you what the specifics are, but from everything we've heard...yeah, them wanting to make a complete pitch keyboard would make sense. For whatever big magic show they've got coming up."
Re: Doctor chooses knowledge
"Every soul's got a sound, you know? A specific pitch. We know that much. It seems like both labels equate them to colours. Spectrum of sound, spectrum of color. Couldn't tell you what the specifics are, but from everything we've heard...yeah, them wanting to make a complete pitch keyboard would make sense. For whatever big magic show they've got coming up."