After you've started getting the bass blob to sing, the tenor one will soon drop into place. A bit more playing finds the mezzo soprano joining in, followed by the soprano.
With a bit of practice it's possible to get them all singing in harmony, and counter-harmony too, and actually remarkably sounding like a real opera.
That is just mesmerising - I've paid good money to sit and listen to Fat Ladies and Even Fatter Men who can't hold a candle to what I've just produced.
Oh was trying to listen to a serious program and wondering what on earth I am doing. 'Blob Opera' I told him. Igor a funny look from him. Then it ran out of memory on my phone and stopped my fun.