Dolby B/C software?
185nW/m comes to mind. Yes, it is my recollection that there were
cassettes that were recorded with peaks above Dolby level. I'm not
sure that this is as Dolby intended, but it did happen.
I think 185nW/m is the right reference level.
Dolby's intent had nothing to do with the peak level, which was controlled
by the quality of the tape, heads, electronics, etc.
Interestingly, good cassette machines could tolerate higher peak levels with
dbx II than with Dolby. I never figured that out.
|