Operation And Applications; The Basics: Straight Delay; Schematic Representation Of Straight Delay - Lexicon Prime Time 93 Owner's Manual

3.0 OPERATION AND APPLICATIONS
During the following instructions, it may be helpful to consult FIG. 2.0,
the M.93 BLOCK DIAGRAM.
3.1 THE BASICS: STRAIGHT DELAY
MIX
DELAY
LlNE
A
B
FIG. 3.0 SCHEMATIC REPRESENTATION OF STRAIGHT DELAY
MASTER
OUTPUT
Because it takes time for sound to travel in air, there is a delay from the
time a sound is made to the time it reaches a listener's ears. This delay
is the basis of many perceptual phenomena. Perhaps the most obvious example
of delayed sound is that of an echo, a reflection of sound occurring perhaps
seconds after the original. Less distinct but also striking are the delay-
ed sounds reflected from the walls of large halls or cathedrals which follow
the direct sound by about 50 or more milliseconds.
The delayed sounds immediately following the direct sound are called early
reflections. Following the early reflections are multiple reflections which
become increasingly dense in time and space. So long as they are less than
30 - 50 msec apart, they are perceived as a continuous sound and are known
as reverberation. Early reflections which follow within 30 - 50 msec of
the direct sound are similarly perceived as continous so that they appear
to be part of the original sound. These reflections determine the room
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