As an amateur musician, I’d be more interested in these tools if, along with the text description, they took as input a melody or chord progression or performan

As an amateur musician, I’d be more interested in these tools if, along with the text description, they took as input a melody or chord progression or performance data. Maybe ABC notation or a MIDI track? Anyone doing that? Other cool things would be a way to generate a sampled instrument from a text description, or to generate a new track given a text description and all the previous tracks for other instruments. There could be a new generation of audio tools that let you generate placeholders or better for everything.