Blob Opera is a fantastic free website that works on all devices. Blob Opera is a machine learning experiment by David Li in collaboration with Google Arts and Culture. How it works: Drag the blobs up and down to change the pitch (or forwards and backward for different vowel sounds). Another machine learning model lets the blobs respond to and harmonise your input in real-time. My class loved it today and had a play on their iPads (I would advise using headphones!). You can record your music, ch