| Audio Tape Digitisation Workflow |
| WHY: It is possible to decode a recording made using a noise-reduction system at a later time, but the multiple variables in alignment can compound any errors and make it difficult to decode the signal accurately once the tape has been transferred. HOW: Select the same noise reduction system that has been used when the recording was made, IF the decoding system is known. If in doubt, make a linear transfer. Perfect amplitude adjustment is very important with noise reduction systems in order to guarantee the symmetrical operation of both the recording and playback sytems. SEE: IASA-TC04, p. 31. Wikipedia: Dolby noise reduction system Wikipedia: DBX noise reduction Richard L. Hess: Noise Reduction The Practitioners Guide - Dolby SP NR Frame Alignment Procedure The Practitioners Guide - Dolby 361 NR Frame Alignment Procedure Dolby B System Encoding |
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