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The Algorithms and their Parameters
DIF (Diffusion)
PDLY (Pre-Delay)
SPN (Randomization)
WAN (Wander)
DDLY ( Dry Delay)
DIF controls the degree to which initial echo density increases over time. High
settings of DIF result in high initial buildup of echo density; low settings cause low
initial buildup. Echo density is also affected by SIZ; smaller spaces will sound
denser. To enhance percussion, use high settings of DIF. For clearer, more
natural vocals, mixes, and music, use low or moderate settings.
PDLY adds an additional delay to the reflections and to the reverberation. This
control may be useful in a sound reinforcement situation, or for ambience effects.
Random Ambience Page Two
SPN affects the movement of many of the delay taps. The object of SPN (and
WAN) is to continuously alter the timbre of the reverberant sound. This makes
the result more natural, without making the position of instruments unstable.
SPN should typically be 20 or higher. High values may make the pitch of piano
or guitar unstable.
WAN sets the distance in time that the early reflections will move. For best results
WAN should be about 10ms at larger sizes.
DDLY provides a delay for the "dry" audio path.
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