T
Tim Gillett
Banned
Actually dbx doesnt exclude 1khz. If it did, you would have noise at 1khz as if there was companding everywhere else but at that freq. 1khz is just a convenient mid frequency tone used often for lining up gear including dbx.
Dolby B used 400hz as a reference because it was just out of the passband of the sliding compander.
Dolby A is broadband like dbx but does it in a different way. Dolby B and C are more high freq only, with C extending further down but still leaving low freq's untouched.
They're all companders of one sort or another.
Dolby.com has great background info on all its NR systems.
Cheers Tim
Dolby B used 400hz as a reference because it was just out of the passband of the sliding compander.
Dolby A is broadband like dbx but does it in a different way. Dolby B and C are more high freq only, with C extending further down but still leaving low freq's untouched.
They're all companders of one sort or another.
Dolby.com has great background info on all its NR systems.
Cheers Tim