Cassette transcriber into pitch shifter?

[seilee1]

There's a Panasonic RR-830 cassette transcriber at a thrift store here and I wanted to see if anyone might have any guesses as to whether it'd be possible to run a live signal into the circuit somewhere and use its pitch shifter in realtime.

I don't know much else about the electronics in there except that the pitch shifting mechanism seems to be designed for monophonic textures (i.e. not music). The manual is at http://service.us.panasonic.com/OPERMANPDF/RR830.PDF.

Would it make sense to try cooking up something that would allow a mic level signal to impedance match the circuit early in the audio path (near the tape head)?

(I posted this in the "Everything Else" section and got just one reply, so I thought I might see if it'd get more of a response here.)