>Hi Andrew
>The TASCAM range of four-tracks cassette decks



 
>Hi Andrew
>The TASCAM range of four-tracks cassette decks can do this but you need to make sure the deck plays >at 1 7/8ips and has the appropriate noise reduction system (or it can be turned off if necessary).  Some >studio four-tracks cassette decks run at 3 3/4ips and have dBx only.
>
>The TASCAM 134 or 234 would suit your need but you need to avoid the dBx-ONLY variants of those >models.
>
>Good luck
>Nigel

Second the recommendation for Tascam on 4-track cassettes. I had a Marantz that I liked very much, which had variable pitch control, but it died. The Marantz had optional DBX, which one friend of mine loved to send his vocals through, processed, and play back unprocessed. He called it "Anti-DBX"..

-Matt Sohn