User Guide

DITHER (0.01 TO 2.00 BITS)

Dithering is used to reduce the audible effects of quantization noise which are

most audible in 8-bit samples.This is accomplished by adding a small amount

of noise to the signal to mask the more obtrusive 8-bit quantization distortion.

The dither depth is the amplitude of the added noise in terms of the least

significant bits of the sound file. For most cases, a value between 0.5 and 1.2 is

sufficient.

Use very small amounts of dithering and listen to whether the

quantization noise is less obtrusive. Increase the dither amount until the

dither noise is louder than the quantization noise.

DC OFFSET

Use this dialog to change the baseline of a sound file. A recorded wave that is

not centered around the zero baseline in the waveform display is said to have

a DC offset.To correct for offsets, a constant value is added to each sample.

DC offsets are usually caused by electrical mismatches between your sound

card and microphone. Glitches and other unexpected results can occur when

sound effects are applied to files that contain DC offsets.

AUTOMATICALLY DETECT AND REMOVE

When this option is checked, the DC offset is calculated for each channel

individually and then automatically corrected.

ADJUST DC OFFSET BY (-32,768 TO 32,767)

Enter the offset value.The offset can be from -32768 to 32,767 for 16-bit data

and from -128 to 127 for 8-bit data.

An easy way to spot DC offset is to zoom close up to a spot in the sound

file containing only silence and see if the silence waveform matches the

centerline in the waveform display.

REFERENCE

192

NOTE