No. There is no official manual. There are a lot pf threads here and elsewhere about how to do certain things and even some threads where the OP asked a question and the issue was resolved in the thread.
Steve, did you manage to make a decent digital transcription of the tape to wave?
There is a lot you can do in Audacity with that.
Normalizing the color channels to zero dB while retaining the DC offset is a good first step.
James.

