ES1 amp and output controls in Logic Pro for iPad

The parameters in the ES1 Amplifier section allow you to fine-tune sound level behavior. These are separate from the Out Level parameter, which acts as the ES1 master volume control.

Amp parameters

Mode pop-up menu: Determine how the ADSR envelope generator is used for control of the amplifier envelope. The ES1 amplifier envelope modes affect played notes in different ways.
- AR: In this mode, move the Attack and Release sliders of the ADSR envelope to set these portions, or stages, of the sound. Between these stages, a gate control signal maintains a constant level while a note is held. When you release the key, the release stage 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 all ADSR envelope sliders.
- R: 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 stage begins. The Attack, Decay, and Sustain sliders of the ADSR envelope have no impact on the sound level.
  The letters A, D, S, and R refer to the attack, decay, sustain, and release stages of the envelope (see envelope parameters).
  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 a gate signal 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 stage—in other words, an even, sustained sound.
Vel Min/Max sliders and fields: Determine how note velocity affects the synthesizer level. Use the sliders to set minimum and maximum velocity range values. The greater the distance between the sliders, the more the volume is affected by incoming velocity messages.

Output parameters

Out Level knob and field: Set the ES1 master volume.
Chorus buttons: Choose a classic stereo chorus effect, an ensemble effect, or disable the effects processor.
- Off disables the built-in chorus circuit.
- C1 is a typical chorus effect.
- C2 is a variation of C1 and is characterized by a stronger modulation.
- Ens(emble) uses a more complex modulation routing, creating a fuller and richer sound.

Control your sound level over time

The envelope generator controls the sound level over the course of a note duration. The modulation intensity and response to velocity information is set with the VCA Vel Min/Max sliders in the Amp section.

In the Logic Pro ES1 Amp section, set the minimum and maximum amount of modulation with the Vel Min/Max sliders and fields.
The difference between the Vel Min/Max sliders indicates the dynamic range of this modulation.
Set the ADSR sliders to the values you want to use, and adjust the Vel Min/Max sliders as needed.

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Logic Pro User Guide for iPad

ES1 amp and output controls in Logic Pro for iPad

Amp parameters

Output parameters

Control your sound level over time