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Here is how the envelope generator works:
99
(L4)
0
Key Down
• When you press a key on the keyboard, the level goes from level L4 to level L1 at the R1 rate.
• When level L1 has been reached, the level starts to change to the L2 value at the R2 rate.
• When level L2 has been reached, the level starts to change to the L3 value at the R3 rate.
• The L3 value is then maintained as long as you hold down the key.
The level L3 corresponds to the Sustain level in a standard ADSR envelope.
• When you release the key, the level changes to the L4 value at the R4 rate.
Note that the L4 level doesn't necessarily have to be zero, in which case the L4 level will sustain infinitely. This
!
is normally useful only if the operator is a modulator in the algorithm.
Keyboard Rate Scaling
With the Keyboard Rate Scaling parameter you can define how the decay for each operator's envelope generator
should be affected depending on where on the keyboard you play.
• With the Rate knob set to 0, the decay is the same across the keyboard.
• A high Rate value results in longer bass note decays and shorter treble note decays.
Range: 0-7
Keyboard Level Scaling
Keyboard level scaling is another special feature in classic FM synthesizers. If you like, you could compare this
function to the "Keyboard Tracking" function found in other synthesizers.
10
PX7 FM SYNTHESIZER
L1
R2
R1
R3
L2
L3
L3
R4
L4
Key Up
(time)
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