flynwill wrote:I can't imagine it worked very well, as I would expect the bias to erase much of what was already there, starting with the highs.
BIAS frequency and current were adjusted for this application. It worked fairly well on a consumer level. I guess Philips had foreseen a big future for this "invention" with home recorders that taped from radio. It enabled them to fade the disc-jockey after recording the show. But the public never jumped on it, so it disappeared after two years or so.
I've never worked with the Studer version and I wonder if it was any better...
Video is an entirely different thing, with moving heads and so..