Help: Tape Restore Live!: The Dolby B removing filter
Before using this filter, it needs to be calibrated to match the Dolby B
encoder that was used when creating the recording, and the PC recording
volume. Dolby B volume calibration describes
how to calibrate it.
This filter offers the following settings:
Turn this on to hear the sound that is removed by the Dolby B remover.
Probably not very useful.
This slider must correspond to the recording volume that was used when
digitizing the cassette tape. So, if the PC recording volume was set
to a higher volume, this slider must also be set higher.
If this filter is set higher, the Dolby B removing filter will kick
in harder (resulting in a duller sound). Setting it lower results in
a sharper sound.
The sound that is removed by the Dolby B remover is displayed as the dark
blue area (and the light pink are at the top) in the following image:
The filter that is offered by Tape Restore Live! is not a real software Dolby B filter, but it is a close enough approximation to get a decent sound. Because of that it is referred to as a software Dolby B remover instead of a software Dolby B filter.