Add new Models

[furfury]

Is it possible to add more model?

[gvne]

Using more models would require updating the code but shouldn't be a problem.

You can check out @diracdeltas fork right here that uses 4stems 16KHz if I'm not mistaken.

If you want to use models that you personally trained, you'd need to adapt the spleeterpp library but again, that shouldn't be much work either.