Yamaha S90 Owner's Manual page 63

PITCH [F2]
You can set the basic pitch parameters for each
Element. You can detune Elements, apply Pitch
Scaling and so on. Also, by setting the PEG (Pitch
Envelope Generator), you can control how the pitch
changes over time.
PEG (Pitch Envelope Generator) [F2]
Using the PEG, you can control the transition in pitch
from the moment a note is pressed on the keyboard to
the point at which it is released. As illustrated below,
the Pitch Envelope consists of five Time (transition
speed) parameters and five Level (pitch) parameters.
This is useful for creating automatic changes in pitch.
Furthermore, different PEG parameters can be set for
each Element.
The full names of the available parameters are shown
in the chart below, as they appear in the display.
HOLD ATK DCY1
Decay 1
TIME Hold time Attack time
time
Decay 1
LEVEL Hold level Attack level
level
Decay1
Attack
Level
Level
Pitch
Hold Level
0
Hold Attack Decay1
Time Time Time
[SF3]
DCY2 REL DEPTH
Decay 2 Release
---
time
time
Decay 2
Release
(Sustain) Depth
level
level
Decay2
Release
(Sustain)
Key off
Level
Level
Time
Decay2
Release
Time
Time
FILTER [F3]
You can use the filter to change the tonal
characteristics of each Element, by adjusting overtones
(harmonic tones) included in the waveform of the
Element.
Cutoff Frequency and Resonance
Filters work by allowing the portion of the signal lower
than a given frequency to pass, and cutting the portion
of the signal above that frequency. This frequency is
referred to as the cutoff frequency. You can produce a
relatively bright or darker sound by setting the cutoff.
Resonance, on the other hand, boosts the level of the
signal at the cutoff frequency. By emphasizing the
overtones in this area, this can produce a distinctive
"peaky" tone, making the sound brighter and harder.
Level
Cutoff frequency
These frequencies are
"passed" by the filter.
Level
Frequency (pitch)
Cutoff frequency
About the Filter types
The Low Pass Filter is shown in the illustration above —
however, the S90 features other Filter types as well.
LPF24D (Low Pass Filter 24dB/oct Digital)
A 4-pole (-24db/oct) dynamic LPF with a strong resonance.
Frequency (pitch)
Resonance
Resonance
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Voice Edit