Agreed, it seems to either play a note you've played or pick a random interval. The interval and timing perhaps aren't truly random but it makes no difference

Agreed, it seems to either play a note you've played or pick a random interval. The interval and timing perhaps aren't truly random but it makes no difference to the listener's ear. Doesn't appear to have any concept of, or the ability to learn, scales, rhythm, or melody (or chords). Neat idea, but akin to playing piano with a 5-year-old (perhaps not as fun).