Most AI music generators use a form of neural network trained on vast libraries of existing music. The model learns statistical patterns — which notes follow which, how drum patterns relate to bass lines, how vocals sit in a mix.

The training data is the controversy. Models like Suno were reportedly trained on copyrighted recordings without permission or payment. Major labels — Universal, Sony, and Warner — have filed lawsuits arguing this constitutes mass copyright infringement. The outcome of these cases will shape whether AI music operates in a legal gray zone or gets regulated with licensing frameworks similar to sampling.