Is it possible to rerecord the video (and linear audio) tracks but preserve the HiFi audio?
You cannot do this without disabling the erase head(s). If this is done, you will get interference from the previously recorded video – the rainbow patterns present at the beginning of recordings over old material on VCRs without flying erase heads. Even if it were possible, I don’t know how robust writing over the HiFi audio tracks would be – you might get degradation after 1 or 2 dubs.
