APT problem solving
When using the APT process, there may be times when the processing creates audible artefacts in a small area of a signal or in a large part of the signal. These artefacts may arise for a number of known signal-related reasons, which are generally understandable and fixable.
- Localized differences between the Guide and Target (Dub) signals as in:
- Vocal "creaks" (where the pitch drops briefly an octave lower or is unmeasurable)
- Phrase or word startup differences (onsets)
- Differences in phrase beginnings or endings being breathy
- Breaths taken between words differently in the two signals
- A word, words or other sound appears in one signal but is absent from the other (this is quite common in Dialog Replacement with noises occurring in the Guide Track)
- Discontinuous signals: Having short sections of a Dub with silence between each short section and trying to aligned this discontinuous signal to a continuous Guide (or vice versa)
- Extra silence at start of signal file: Setting an APT input to start in possibly long stretches of digital silence before the signal starts can sometimes cause a problem
- Tight cuts at signal starts: Not giving an APT Dub input enough "non-signal" to allow it to be moved, if required.
- Different or extreme signal pitch ranges
Most of these situations are quickly solvable using the tools in Revoice Pro, and are discussed in this section or in the Warp section.