What are Dolby B, C, and S, HX Pro, and DBX?
compatible? > Dolby B, C, S, and DBX are techniques for increasing the > signal/noise ratio of recordings. All work in similar ways: > they compress the dynamic range of the sound during recording, > then expand it back upon playback. As much as we would like > it to be otherwise, you only get correct reproduction if you > use Dolby B to play back a Dolby B tape. Same for Dolby C, > Dolby S, and DBX. Dolby HX Pro is the exception. > > Dolby B works mostly with higher frequencies; it increases > their levels during recording and decreases their levels, and > the levels of high-frequency noise such as tape hiss, during > playback. > > Dolby B tapes can be played back without Dolby B processing, > but high frequencies are over-emphasized and the sound will > be excessively bright. This can be compensated for to some > extent by turning down the treble control. Audio novices > often remark that commercially recorded tapes recorded using > Dolby B sound dull when played back with Dolby B; t
