this is quite possibly the internets best interactive website. it’s called The Cup Size Choir, and simply by stroking a few keys on your keyboard you can make these sizzling sirens sing a song for you. there’s even a pre-recorded sample of Deck the Halls to enjoy, (of which i have never
heard seen a better version), and an option to record your own tune. i have no idea what this brilliant website is even for, in fact, i have no idea what i’m doing still telling you about it… i have some music to compose. enjoy!