My question is: Was the number of the samples relatively small? Both authors made much more music than only while being in the Beatles, and if the later songs (

My question is: Was the number of the samples relatively small? Both authors made much more music than only while being in the Beatles, and if the later songs (since the Beatles split) were also (or only!) used for training then I could imagine that such a training can be sufficient. But if only the Beatles songs were used, I suspect it could be possibly not enough to be completely sure. Moreover, I can imagine that the contribution to some songs was made by both in various phases, and that that could confuse the algorithm.