Virtual Acoustic Synthesis
12
The Modifiers
The modifiers block consists of 4 sections as shown in the diagram. Although these may appear to be
simple effects, they are actually intimately related to the PLG150-VL’s sound-producing model and
have a significant effect on the sound.

● Harmonic Enhancer

The Harmonic Enhancer determines the harmonic structure of the sound to
the extent that it can produce radical timbral variations within an instru-
ment “family” (e.g. saxes). Adjusting the Harmonic Enhancer may not
produce audible effects since many of the PLG150-VL voices’ harmonics
are created without the Harmonic Enhancer.

● Dynamic Filter

This section is similar to the dynamic filters found in many conventional
synthesizers, with high-pass, bandpass, band elimination, and low-pass
modes. Some filter parameters are available via the PLG150-VL controls,
but the filter type cannot be changed.
●The degree how much the filter is applied can be changed using
the key scaling.
●The incline of the filters is -12dB/oct.
●This effect may vary depending on the selected voice.

● Frequency Equalizer

The Equalizer boosts or decreases the output level around the designated frequency. The PLG150-VL
lets you access the equalizer function using “Low Gain (Bass)” and “High Gain (Treble)” parameters.

● Resonator

The Resonator uses simulated “resonator” pipes or strings and delays to produce a “woody” reso-
nance effect — although it has little or no effect on some voices. The resonator parameters are not
accessible but preset for some of the preset voices.
Harmonic
Enhancer
Dynamic
Filter
Frequency
Equalizer
Resonator