Did the output sound musical?
For small values of "music"? Really, no. But tbh, neither have more advanced "AI" composition experiments I've encountered over the years, Markov models, linear predictive coding, genetic/evolutionary algs, rule based systems, and now modern diffusion and transormers... they all lack the "spirit of jazz" [0]
[0] https://i.pinimg.com/originals/e4/84/79/e484792971cc77ddff8f...