Polyend Synth - WTFM Synth Voice

69
Polyend Synth Manual
68
Polyend Synth Manual
NOTESNOTES
Synths
5
Synths
5
LFO 1 - Page 1
Sync Frequency or Ratio Waveform
On or Off 0-100 Hz or Intervals Options
Set to Off for speed in
frequency. On synchronises
based on ratio of note
interval divisions.
Speed of LFO in Hz or if
Sync is on, in note interval
ratios.
Modulation wave shape:
Triangle, Sin, Ramp Up,
Ramp Down, Square,
Random S&H
LFO 2 - Page 2
Sync Frequency or Ratio Waveform
On or Off 0-100 Hz or Intervals Options
Set to Off for speed in
frequency. On synchronises
based on ratio of note
interval divisions.
Speed of LFO in Hz or if
Sync is on, in note interval
ratios.
Modulation wave shape:
Triangle, Sin, Ramp Up,
Ramp Down, Square,
Random S&H
Retrigger
Options
Waveform retrigger: Free
running will continuously run;
One Shot will cycle once
when a note is triggered;
Note will trigger from the
start and continuously run
each time a note is triggered.
Retrigger
Options
Waveform retrigger: Free
running will continuously run;
One Shot will cycle once
when a note is triggered;
Note will trigger from the
start and continuously run
each time a note is triggered.
The Auxiliary Envelope and the two LFOs are not pre-patched into the VAP engine by default.
They can be patched in the Mod page.
5.9 WTFM Synth Voice
WTFM is an interesting Frequency Modulation - FM synth which
uses integrated wavetables as its oscillators. The 2-operator FM
synth engine is driven by a 3x feedback system.
FM Concepts
At this stage, it is worth giving an overview of the core concepts of FM
synthesis, which, at face value, can appear complex. An oscillator and
associated functions and conguration in FM synthesis are called an
‘Operator’. The terms operator and oscillator may be used interchangeably
when referring to the WTFM synth engine. A WTFM operator uses
wavetables as the audio source.
FM synthesis is based on the principle that one operator, called a
modulator, affects the pitch of another, called a carrier. This changes the
overall timbre of the sound. In Polyend Synth, the two operators generate
audio and also provide feedback. In other words, the Synth operators
modulate themselves, with operator 2 being the modulator for operator 1,
the carrier.
Ratios also multiply the incoming feedback audio with respect to the main
carrier oscillator frequency to control the harmonic generation musically.
Traditional FM Synthesis, sometimes referred to as a West Coast synthesis
model, does not use ltering. Filters are the normal domain for subtractive
synthesis, sometimes referred to as East Coast synthesis. However,
Polyend Synth does include a lter in the audio chain to offer a more
unique and interesting synth engine.
Oversample
Character
Ratio
Operator 1Operator 2
Oscillator 1Oscillator 2
Character
Ratio
Filter
15 Classic
Models
Volume
Amp
LFO 2LFO 1
Preset
Glide
Finetune
Finetune
Feedback
Feedback
FM
Feedback
Shape
Shape
Aux
ADSRADSRADSR
Reset
Reset
+