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.

Examples include:

  • 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.

Next topic

Topics in this section:

Protected areas

Tight cuts at signal starts

Gaps of silence in audio waveforms

Aligning signals that have limited dynamic range

Seeing pitch information

Rough/low pitch and octave jumps