Sequential Pro One - Modulation Destination Test Patch

6, If used, switch DRONE OFF. Play slowly while adjusting MOD EIL ENV AMOUNT
knob O - 10 to check the filter envelope as modulation source. The filter envelope has
been patched in Figure 1-7 with 1-sec ATTACK, DECAY, and RELEASE times.
Applying this envelope to OSC A FREQ gives a frequency sweep which rises for 1-sec,
decays at the same rate to the sustain level while the key is held, then releases to the
initial
frequency at the same rate when the key is released. The range of the sweep is
increased as you advance the FIL ENV AMOUNT knob. Return FlL ENV AMT to 0.
7. Switch FIL ENV. OSC B and LFU ROUTE switches to WHEEL. Also switch TO OSC
A FREQ from DIR to WH. Test the FEL ENV, OSC B and LFO WHEEL-modulation
sources as in steps 4 through 6 (for DIRECT MOD). The WHEEL test results will be the
same as the DIREC-T results,-cxcept the MOD wheel is also effective as an attenuator
in series with any of the MODULATlON AMOUNT knobs. In other words, the MOD
wheel and the AMOUNT knobls) must both be advanced to engage modulation.
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8. Now that the modulation sources have been checked with OSC FREQ A, the four
remaining destinations can be tested. Patch according to Figure 1-8.
Figure 1-8
MODULATION DES'FINATION TEST PATCH
9. Play and listen to pulse-width modulation of OSC A. Raise LFO AMOUNT to check
depth of modulation. Set to 10, the LFO triangle peaks may cut-off OSC A PULSE (by
forcing it to dc).
10. Switch TO OSC A PW off. Turn MIXER BSC A to' 0. Turn MIXER OSC 5 to 10,
Switch TO OSC B FREQ to DIR. This should create vibrato as heard in step - 4, above.
Check depth by adjusting LFO AMOUNT.
L
11. Switch TO OSC B FREQ off. Switch TO OSC B PW to DIR.' This should produce
pulse-width modulation as heard in step - 9.