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HINT: If the Threshold is set too high then there will be some amount of
crackle remaining in the program. If the Threshold is set too low you may begin
to decrackle good audio, which could result in low frequency artifacts (audible
thumps).
1.1.3.2
Synthesis Order
The Synthesis Order determines the precision of the Decrackler’s resynthesis. In general, the
larger this number, the cleaner and more artifact-free the output. The default value of 150 is
suitable for the majority of source materials.
If low frequency thunks occur in the processed output, try raising the value of the Synthesis
Order to 175 or even 200. However, raising the Synthesis Order markedly increases the amount
of time required to process the soundfile. Synthesis Order should generally be left at 150 unless
the process is producing unacceptable numbers of artifacts.
Paradoxically, processing artifacts tend to occur more with clean recordings that have high
signal-to-noise ratios. For (relatively) recent material, such as tape recordings from the early
1950s, it is common to set the Synthesis Order to 128. For 78s from the 1930s, however, it is
common to set the Synthesis Order to 125.
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