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WavStack
This mode stacks five detuned copies of the
waveform on top of itself, which makes for a
fat sound using only a single oscillator. Pro
tip: Spreading out multiple voices with the
StereoWidth parameter ([VOICE] page 1) can
make the sound HUGE.
Depth controls the amount of detuning
between each of the five copies. Dry/Wet
adjusts the balance between the unprocessed
input and the mutated output.
OSC Sync
Oscillator Sync is a classic analog synthesizer technique where an oscillator is forced to align its
harmonics with another oscillator. Traditionally this is done with simple waveforms, and with
the second oscillator affecting the first. Hydrasynth provides many more options, including the
use of all 219 waveforms in either position, the ability to sync Osc 1 and/or Osc 2, and the ability
for any of the three oscillators to be used as the sync source.
OSC Sync parameter Range
Description
Source
Osc 1, Osc 2, Osc 3
Select sync source.
Ratio
0.250-64.000 in varying
increments
How many times the wave will resync in
a single cycle.
Hold [SHIFT] to jump in whole numbers.
Depth
0-128 in increments of 0.1
Controls the strength of the sync effect
Window
0-128 in increments of ~0.1 Applies Hann window to sync source
Feedback
0-150%
Feeds the sync output back into itself
Dry/Wet
0-100%
Mix raw wa sync result; 100% =
pure Mutant
The Ratio parameter is unusual for oscillator sync. Normally the sync operates at a 1:1 ratio: the
synced oscillator conforms to a single cycle of the host waveform, and that’s that. But the Ratio
parameter sets the number of times the oscillator will resync within that single cycle. See the
next section for a more complete explanation.
About Ratio
The Ratio parameter is part of what makes
the Hydrasynth voice engine unique. It gives
you control over how many times PWM or
Oscillator Sync happens during a single
waveform cycle, instead of happening only
once per cycle as with other synthesizers. It
may help to think of it like this:
• At 1:1 there is one process for one cycle of
the wave.
• At 2:1 there are two processes for one cycle
of the wave.
So at 2:1 the PWM is happening twice in a cycle
instead of once (the way “normal” PWM does);
the Oscillator Sync is happening twice in the
cycle.
The ratio can be as high as 64:1 or as low as
0.250:1. This means that the mutation process
can occur as many as 64 times in the space of
one waveform cycle, or as few as one time in
the space of
four
waveform cycles.
Window
A Hann window applies a sort of “bell curve”
filter to the Osc Sync source. It rolls off the
high and low input frequencies at ~18dB /
octave, which can help tame any harshness in
the output.
