Two M.93'S - Lexicon Prime Time 93 Owner's Manual

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flanging as an example. But it can also be used with a function generator
providing square waves, ramps, or other functions for additional latitude
in creating special effects. A square wave, for example, can provide several
distinct and different resonance tones when used with a resonance effect.
3.8 TWO M.93'S
The subject of the two M.93's is perhaps deserving of a chapter all its own.
For two not only double the capacity of one, they also give rise to new
~apa­
bilities altogether. Flanging, for instance, can have a virtually infinite
sweep. Reverberation techniques can utilize far more complex interconnec-
tions. Of course more straightforward applications can be enhanced: triple
tracking can go to quintuple tracking; two slap echoes go to four slap echoes;
mono effects go to stereo effects; stereo goes to quad, etc.
Flanging with a single M.93 spans a frequency range of 2:1 corresponding to a
maximum delay difference change of 2:1 using the VCO. But with two M.93's
the frequency range can be arbitrarily large. For example set one delay tap
of M.93A to 10 msec with the VCO in the
11
(cal)
11
position. Feed the single
delayed output to the AUX input of M.93B. Use the same source for the IN
input of both units. Set one of M.93B's delay taps to 10 msec as well. This
time use the VCO of M.93B to vary its delay time from 10 to 5 msec and mix
the corresponding delay tap with AUX at identical levels in the OUTPUT MIX.
At one extreme the time difference of the two delays is 5 msec. At the other
extreme the time difference is 0. The range of delay differences is, then,
5:0. The notch of a positive flange will vary in frequency from 200Hz (cor-
responding to 5 msec) to an infinitely large frequency (corresponding to 0
msec). To lower the bottom frequency even more, increase the delay time in
both units. To limit the highest frequency notch reduce the delay time in
M.93B alone. Reducing the DEPTH will increase the lowest frequency of the
flange. Reducing the DEPTH control will decrease the highest frequency
of the flange if M.93B is set to 20 msec delay instead of 10.
Simulated reverberation with the two M.93's can be made to have much higher
echo densities by recirculating four delay taps instead of only the two
available with one M.93. Several approaches can be taken in order to ac-
complish this. Use one M.93 to provide two additional delay times which
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