User`s manual

The equalization effect of SIF is very beneficial with reverberant audio and recordings

exposed to substantial recorder wow and flutter. The noise sources must remain stationary for

SIF to be effective. SIF cannot readjust itself to changing noises, such as music. In such cases,

the 1-Channel adaptive filter is recommended.

A second SIF equalization mode is Attack Noise. This mode is especially useful in reducing

band limited noises such as horns and mechanically induced noises. The operator isolates the

spectral region where the noise is present with limit cursors and the noise is precisely

flattened within that region; audio outside these limits is unaffected.

Description of controls/indicators is as follows:

Filter Display: Used to display the original audio spectrum Input (Yellow Trace =

Filter) and the spectral inverse filter curve (Blue Trace = Filter Shape).

For each trace, 460 spectral lines and 70dB of dynamic range are

displayed. A grid is superimposed to aid the user in determining

frequency and amplitude.

Figure 4-38 SIF Control Window When Equalize Voice Selected