NONLINEAR LABS C15 - Page 51

Synthesis Engine
Synthesis Engine
100 101
Output Mixer
The (main) output signal, being passed to the Eects section, is defined by a stereo
mix of four signals provided by the two branches (A, B) and the two filters (Comb, SVF).
Each signal can be weighted by a bipolar amount and positioned in the stereo field by a
panning parameter.
A sine shaper (providing Drive, Fold and Asymetry, as described for the branch shapers)
can manipulate the sum signal and create additional harmonics. The sum also can be
amplified or damped by a Level parameter. The key position of a note can also be applied
for the tone’s position in the stereo field by a „Key Pan“ parameter.
Aer the output mixer, the signal will be monophonic (the sum of all voices) and at the
same time dual channel (with stereo spreading).
Eects
A chain of five stereo eects can be applied to the output signal, each eect having its
own characteristics and an individual mix amount, which blends it into the output mix.
Flanger
The first eect is a dynamic stereo delay capable of producing chorus-, phaser- or flanger-
like sounds. Its basic mechanism can be compared to the Comb Filter, although the
Flanger is not sensitive to Key Tracking. The usual sweeping eect arises when the delay
time is changing (due to modulations), as the delayed signal is combined with the input
signal and changing harmonics are created.
As the delay times are relatively short, this eect is not able to create wide spatial eects,
but a certain perception of depth will emerge nevertheless. The delay time can be spread
for both channels with a „Stereo“ parameter.
Pan
A B
Pan
Comb SVF
Level
Pan Pan
Pan Voice Mix
Shaper
Key Pos
Output Mixer
12
Feedback Mixer
The global feedback signal, usable for phase modulation and within the Shapers,
is defined by a mix of four signals provided by the two filters and the Eects section
(blendable between pre and post Reverb). Each signal is weighted by a bipolar Amount
parameter, as the polarity can have a noticeable influence on the feedback behavior.
A sine shaper (providing Drive, Fold and Asymetry, as described for the branch Shapers)
can manipulate the sum signal and create additional harmonics. The sum also can be
amplified or damped by a Level parameter that can be sensitive to Key Tracking.
The feedback signal will be a mixture of polyphonic signals (provided by the filters) and
monophonic signals (provided by the eects, having no more voice association and being
a downmix of the original stereo signal).
Feedback Path:
Comb SVF Eects
KT
Level
Reverb
Dry Wet
Shaper
Feedback Mixer
11
Oscillator A Shaper A
FB Mix
FB Mix
Comb
Filter
Output Mixer (Stereo)
Feedback Mixer Shaper
Shaper
State
Variable
Filter
Oscillator B Shaper B
Cabinet
Gap
Filter
Flanger Echo Reverb
RM