repet object's "interact" method passes wrong argument to gradio

[cadr]

Running the "Making it Interactive!" step of https://source-separation.github.io/tutorial/first_steps/repetition.html, I get the following error:

ValueError: Invalid value for parameter type: file. Please choose from one of: ['numpy', 'filepath']

The issues seems to be that the type "file" here
https://github.com/nussl/nussl/blob/master/nussl/separation/base/separation_base.py#L140

is not supported by Gradio according to
https://gradio.app/docs/#audio