8
Table Of Contents
- Logic Express 8 Instruments and Effects
- Contents
- Introduction to the Logic Express Plugins
- Amp Modeling
- Delay
- Distortion
- Dynamics
- EQ
- Filter
- Imaging
- Metering
- Modulation
- Pitch
- Reverb
- Specialized
- Utility
- EVOC 20 PolySynth
- EFM1
- ES E
- ES M
- ES P
- ES1
- ES2
- The ES2 Parameters
- Tutorials
- Sound Workshop
- Sound Design From Scratch, Filter Settings, Digiwaves
- Three Detuned Sawtooth Oscillators and Unison Mode
- Extremely Detuned Monophonic Analog Sounds, Effects
- Clean Bass Settings With One Oscillator Only
- Distorted Analog Basses
- FM Intensity and Frequency
- Controlling FM Intensity by an Envelope and FM Scaling
- FM With Drive and Filter-FM
- FM With Digiwaves
- FM With Wavetables
- Distorted FM in Monophonic Unison
- FM With Unusual Spectra
- Slow and Fast Pulse Width Modulations With Oscillator 2
- Pulse Width Modulation With Two Oscillators, PWM Strings
- Ring Modulation
- Oscillator Synchronization
- First Steps in Vector Synthesis
- Vector Synthesis—XY Pad
- Vector Synthesis Loops
- Bass Drum With Self-Oscillating Filter and Vector Envelope
- Percussive Synthesizers and Basses With Two Filter Decay Phases
- Templates for the ES2
- Sound Workshop
- EXS24 mkII
- Learning About Sampler Instruments
- Loading Sampler Instruments
- Working With Sampler Instrument Settings
- Managing Sampler Instruments
- Searching for Sampler Instruments
- Importing Sampler Instruments
- Parameters Window
- The Instrument Editor
- Setting Sampler Preferences
- Configuring Virtual Memory
- Using the VSL Performance Tool
- External Instrument
- Klopfgeist
- Ultrabeat
- GarageBand Instruments
- Synthesizer Basics
- Glossary
- Index
Chapter 20 ES2 261
Slow and Fast Pulse Width Modulations With Oscillator 2
Pulse Width Modulation (PWM) is one of the most essential features of any
sophisticated analog synthesizer.
 Choose the PWM Start setting, and move the Wave control slowly back and forth
between the rectangular and the pulse wave symbols. Both are green. What you will
hear is a (manual) pulse width modulation.
 Choose the PWM Slow setting. Here, LFO 1 controls the pulse width modulation
source, not your manual movements. The result should be quite similar.
 Raise the LFO 1 rate from its pre-set value of 0.230 to 4.400. The result is a classic, fast
PWM.
 In this, and the next step, the PWM will be set so that it sounds slower in the lower
keyboard range, and faster in the upper range. This is desirable for many sounds,
such as synthetic strings. First, reduce the LFO 1 Rate to 3,800.
 Change the modulation intensity of the second Router channel (target = LFO1 Rate,
Source = Kybd) to 0.46. This will alter the scaling of the PWM, making it sound faster
in the treble range. You can also hear this type of effect in the PWM Scaled setting.
∏ Tip: Avoid Drive and Distortion with PWM sounds.
Pulse Width Modulation With Two Oscillators, PWM Strings
In order to make the sound fatter, add Oscillator 3, which can also be pulse width
modulated. In fact, even the first oscillator can deliver PWM. In the PWM 2 Osc setting,
both oscillators are detuned quite significantly. Develop your own personalized PWM
string sound, using this setting as your base.
 Adjust the Chorus intensity. You’ll probably choose higher values, which make the
sound rather broad.
 Program Envelope 3 according to your taste. You should, at the very least, raise the
attack and release times. Define it to react to velocity, if you prefer. If you want to use
the sound for something other than a simple pad, a shorter Decay Time and a lower
Sustain Level of about 80 to 90% may be more appropriate.
 Reduce the Cutoff Frequency and Resonance of Filter 1 to make the sound softer.
 Save the new setting.
 Compare the result with the PWM 2 Osc setting. You’ll hear that the sound has
undergone a remarkable evolution.
 Compare it to PWM Soft Strings, which was created as described above. You’ll
probably notice a few similarities.