User guide
19
DRIVE FUNCTION
The DRIVE funcon is operaonal only when CHORD MODE is acve. It applies a variable amount of gain
(between 1 and 3) to output1, followed by a cubic saturaon process. The purpose of this funcon is to com-
pensate somewhat for the loss of amplitude experienced due to phase cancellaon of the mulple waveforms
when in CHORD MODE. The saturaon keeps the peak amplitude within limits, and provides a nice so rollo
of the peaks for most waveforms. In some cases the result may sound distorted at high DRIVE levels.
To set the nominal value of the DRIVE parameter, press the TILT/DRIVE buon. If CHORD MODE is acve, the
DRIVE parameter value can then be adjusted with the rotary encoder and will be shown in the boom row of
the LCD display. The DRIVE parameter can also be modulated by the MOD B input, which is acvated with a
second press of the TILT/DRIVE buon. When MOD B modulaon is acve the lower row of the LCD display will
change to show both the nominal seng and the oset provided by the MOD B modulaon.
The output of the nonlinear waveform combiner, aer going through the envelope amplier, is passed through
a simple comb resonator/delay line. For short delay mes this acts as a resonator, and at long delay mes
it provides an echo eect. The DELAY parameter sets the amount of feedback from the output of the delay
line back to its input, and also sets the wet/dry mix of the input and delayed signals. As the DELAY parameter
increases, the resonator depth, or the echo regeneraon increases. At the same me the wet/dry rao in-
creases. This is needed to prevent saturaon or clipping at higher feedback levels, and means that the level of
the input signal gets lower and lower as the DELAY parameter increases. At the maximum DELAY seng the
feedback is 100% and the input is 0% and the delayed signal will be innitely repeated (a hold or freeze eect).
This can be used in performances to provide overdubbing or looping eects. To do this one quickly changes the
DELAY parameter (using the MOD B knob as described in the next paragraph) to 0, plays some material, then
quickly changes the DELAY parameter to 99 to hold and repeat the material just played.
To set the nominal value of the DELAY parameter, press the DELAY buon. The DELAY parameter value can then
be adjusted with the rotary encoder and will be shown in the boom row of the LCD display (on the display it
is labeled as echo rather than delay). The DELAY parameter can also be modulated by the MOD B input, which
is acvated with a second press of the DELAY buon. When MOD B modulaon is acve the lower row of the
LCD display will change to show both the nominal seng and the oset provided by the MOD B modulaon.
The DELAY parameter does not specify the delay me, however. The delay me is set by the period of oscilla-
tor 2. This permits synchronized LFO echo eects when oscillator 2 is in LFO mode, and produces pitch syn-
chronous resonator eects when oscillator 2’s pitch follows that of oscillator 1 (as when QUANT is turned on).
The signal tracking the period of oscillator 2 is passed through a slew-rate limiter (low pass lter or smoother)
before using it to compute the delay me. This causes a pitch shiing when the pitch of oscillator 2 changes.
At long delay mes (oscillator 2 in LFO mode) this produces long gliding pitch shis, while at short delay mes
(resonator eect) this slew produces anging eects.
DELAY FUNCTION