Lexicon MPX 200 User Manual page 42

Program Descriptions
DELAY AND ECHO
Delays and echoes are effects that repeat a sound a
short time after it first occurs. The simplest (and oldest)
delay effect is tape slap — a single repeat about 100ms
after the original sound. (It was often used on Elvis
Presley's voice and rockabilly guitar tracks.) Tape slap
becomes tape echo when the output of the tape is fed
back into the input (feedback), turning a single repeat
into a series of repeats — each a little softer and a little
darker than the last. This darkening of each repeat is char-
acteristic of the analog tape recording process. Digital
delays do not have this characteristic–each repeat has
the same exact timbre and the only difference from
repeat to repeat is in loudness.
Digital delay and tape echo are both useful, but they are
different. Tape echo is warmer and allows the original
sound to stand out more, while digital delay can present
a "perfect" copy of the original sound.
4-12
The Delay and Echo variations include mono (5.5 sec-
onds), stereo (2.7 seconds), and 6-voice multitap effects.
Each of the programs can be used for digital delay or
tape echo effects. When the Adjust parameter is set to a
value between 63 and 0, tape echo effects are pro-
duced. (Each repeat is darker and softer.) When the
Adjust parameter is set to a value between 64 and 127,
digital delay effects are produced. (Each repeat is the
same timbre, but softer.)
In programs 90-97, Adjust also sets the amount of feed-
back — with an increasing number of repeats as the
parameter value is increased. Delay time is set with Tap.
Each program is preset with a different useful rhythm.
In Variations 98-104, the amount of feedback is preset and
Adjust determines Delay time.
When using any type of delay or echo effects with music,
always pay attention to the way the repeats fall rhythmi-
cally to the beat. The most effective delay and echo pat-
terns are those that lock in with the tempo of the tune.
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