Sequential Pro One - Front Panel Overview; The Voice Architecture

1-9 MODULATION TEST
This test checks the LFO waveshapes, the three MODULATION FROM AMOUNT knobs
and ROUTE switches, and the five destination (TO) switches. (The FIL ENV and OSC B
modulation sources were tested above.) Since this test includes the LFO, don't use the
arpeggiator or sequencer.
Figure 1-7
MODULATION SOURCE TEST PATCH
1. Patch according to Figure 1-7. (AMPLIFIER RELEASE must be greater than FILTER
RELEASE to hear the complete filter envelope.)
2.
Hold a key or use DRONE. Raise the LFO AMOUNT knob and note increasing
frequency sweep of OSC A. Since OSC A frequency is being controlled by the LFO
sawtooth, the frequency rises consistently, then snaps back to the t'initial"frequency
[para. 2-19).
3. Switch LEO SAWTOOTH off and LFO SQUARE on. This will give a futrillM effect,
with the interval expanding with increased LFO AMOUNT. At 4 - 5 on the dial the
higher note will be an octave- above the initial frequency. At about position 8 the range
will be two octaves, (para. 2-19)
4. Switch LFO SQUARE off and LEO TRIANGLE on. A symmetrical vibrato should be
heard. Adjust LFO FREQUENCY O - 10 to explore the range of vibrato available
(which is from about 1/4 to about 25 Hz). Leave LFO FREQUENCY set to about 6.
Return LEO AMOUNT to 0.
i
5. Adjust OSC B AMOUNT 0 - 10 to check OSC 0 as rnoddlation s6urce. The effect will
be a vibrato similar to that produced by the LFO. Adjust OSC B FREQUENCY to hear
the range, Leave OSC B FREQUENCY and OSC B AMOUNT set to 0.