User Guide

FLANGE
The flanging effect is heard in many 60s and 70s recordings. It is the result of
mixing a modulated delay signal with the original signal to create a sweeping
sound much like an airplane taking off. Use the Flange dialog to choose
between five preset effects: Slow, Medium, Fast, Warble 1, and Warble 2.
Flange effects are best heard with long, sustaining sounds so that the
entire sweep can be heard.
NOISE GATE
The Noise Gate dialog removes signals below a set threshold. It’s used to remove
noise from silent breaks in a sound file.
THRESHOLD LEVEL (-INF. TO 0 DB)
Signals below this level will be removed from the sound file. Zero dB is a very
high level, while -30 dB is very low. Noise levels are usually around -20 dB.
To get an estimate of the noise level, select a region of silence (which also
contains noise) and run the Statistics tool. The maximum value (positive or
negative) shown is a good estimate of the threshold noise level required. For
example, if the maximum positive value is -50 dB and the maximum negative
value is- 45 dB, use a number slightly higher, maybe -40 dB, as the noise
threshold level.
ATTACK TIME (1 TO 500 MS)
Time it takes the gain of the gate to change from zero up to one once the level
rises above the threshold. The attack time is best kept to a minimum if
percussive attacks are to be preserved. Larger attack times make sounds slowly
swell up in volume.
RELEASE TIME (1 TO 2,000 MS)
Time it takes the gain of the gate to change from one down to zero once the
level falls below the threshold. The release time is usually kept large to allow
for natural sounding decays, otherwise long decays will be cut off.
REFERENCE
204
NOTE