More on the Dolby S and Dolby B compatibility issue (see TTOTD 10/9/98). Several readers responded to this issue of Dolby S encoded tapes being able to be played back with Dolby B noise reduction saying that it doesn't sound very good. I'm sure everyone's performance will vary, and it depends on other aspects of the recording, but before you assume everything will be okay with your Dolby S tapes you should check them out on a Dolby B machine if you intend for them to be compatible. With subjective things like this you always need to let your own ears be the judge.