10.6

Table Of Contents
207Logic Pro Instruments
Gate refers to a control signal used in analog synthesizers that is sent to an envelope
generator when a key is pressed. As long as an analog synthesizer key is pressed, the
gate signal maintains a constant voltage. When Gate is used as a modulation source in the
voltage-controlled amplifier (instead of the envelope), it creates an organ-type envelope
without any attack, decay, or release phase—in other words, an even, sustained sound.
The ES1 amplifier envelope mode buttons affect played notes in different ways.
AGateR: In this mode, move the Attack and Release sliders of the ADSR envelope to set
these phases of the sound. Between these phases, the Gate control signal maintains a
constant level while a note is held. When you release the key, the release phase begins
immediately. The Decay and Sustain sliders of the ADSR Envelope have no impact on
the sound level.
ADSR: Set this mode to control the level of the sound over time with the ADSR envelope.
GateR: In this mode, the Gate control signal maintains a constant level while a note is
held. As soon as you release the key, the release phase begins. The Attack, Decay, and
Sustain sliders of the ADSR Envelope have no impact on the sound level.
ES1 modulation
Logic Pro ES1 modulation parameters overview
ES1 offers a number of simple yet flexible modulation routing options. You use modulation
to add animation to your sound over time, making it more interesting, lively, or realistic.
A good example of this type of sonic animation is the vibrato used by orchestral string
players.