Sequential Prophet VS Manual page 144

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FILMUSIC (#69)
This program produces vocal sounds which fade slowly between four pitches,
two of which are LFO-modulated for tremolos which fade in and out. Although
not necessarily an ideal program for lead lines, it can produce interesting, rich
textures with only a few voices.
Keyboard Mode
This program is in Double keyboard mode, and is linked to itself with a 208-
msec delay and minor detuning. This causes an overlapping of different
pitches as the program loops. To hear the program without this layering,
switch Double off.
Oscillator Group
Waveforms 67, 74, 75, 76 are used for vocal resonant qualities, tuned at
desired intervals with no fine tuning. If desired, try selecting and adjusting
Coarse Frequency for each oscillator.
The mix envelope moves steadily through points 0 through 4, with each point
determining the order in which the four pitches are heard. The mixer envelope
is set to loop back and forth between points 0 and 3, causing the pattern to
repeat. As the program is in double mode, these pitches lag each other by 208
msec (1/5 second), creating interesting harmonies.
Looking through the modulation section shows that LFO 1 modulates oscillator
D, and LFO 2 modulates oscillator B. Since the mixer envelope fades between
these two oscillators between points 1 and 3, the effects of the LFOs appears
to fade in and out slowly. Since oscillators B and D are at different pitches, and
the LFOs run at different rates, the program takes on an ensemble texture.
The pressure modulation source has a negative amount, and when used,
lowers the pitch of oscillator A, its only modulation destination.
For other interesting effects, make a copy of this program which loops
between points 1 and 3 (rather than between points 0 and 3), then double that
program with this one, so that the resulting harmonies repeat less often.
Filter
The filter cutoff is low enough to allow discernable variations in the amount
of filter envelope modulation. Velocity and keyboard modulation sources
contribute to the increased "swept filter" effect. The filter envelope has an
ADSR shape, with a slow attack. Unlike the mixer envelope, the filter envelope
does not loop.
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