I used to have a simaler problem with punching on my old 414. Seems to be a mechanical switching delay. No such problems on my 788 though. Absolutely seemless even when the VU is lit at the IN point. The only additional advice I'd give is to make sure you play along with the pre / post roll and...
I assume you are basically using the 424 as an outboard mixer?
Buzzing is normally an electrical short so I'd start by checking your cables. Plug some headphones into the 424 and check indvidual mic channels for faults (also look at the input meters). Try plugging the line outs into an amp or...
Hi, the 788 end of your scsi cable should be a Centronics DB-50 way half pitched male connector. My CDR drive is a teac 58s which has the larger full piched 50 way male connector. I assume this will be the same for the cdr788
Hope that helps
Ben