Quick Sampler Amp controls in Logic Pro for iPad
Quick Sampler Amp controls set the level, pan position, and polyphony.
You can control the level over time with a dedicated multimode envelope. Parameters that are modulation targets are indicated by a white dot when a note is played. The modulation range is shown as an orange ring around target parameters.
Tap the amp envelope display to open the Amp edit pane. You can drag points or lines in the pane to adjust envelope parameter values. Alternatively, in envelope parameter fields, drag values vertically to adjust them, or tap the field to open a dialog and enter values.
Tap Close at the top right of the edit pane to close it.
You can quickly switch between the Pitch, Filter, and Amp edit panes with the pop-up menu at the top left.
If you’re new to synthesizers and the concepts behind envelopes, see Intro to synthesizers.
Quick Sampler Amp parameters
Amp Pan knob and field: Set the overall panorama position in the stereo field.
Voices pop-up menu: Set the maximum number of voices that can be played simultaneously.
Volume knob and field: Set the overall output volume level.Amp envelope display: Shows the current amplitude envelope. Tap to open the Amp edit pane.
Quick Sampler Amp Envelope parameters
Type pop-up menu: Choose the envelope type. This alters the number and appearance of envelope parameter fields and the graphical envelope display.
Amp Envelope Attack handle and field: Drag horizontally to set the time it takes for the envelope to reach the initial level. Drag the field vertically.
Amp Envelope Hold handle and field: Drag horizontally to set the time the full level is held, following the attack phase, before the decay phase begins. Drag the field vertically.
Amp Envelope Decay handle and field: Drag horizontally to set the time it takes for the envelope to fall to the sustain level, following the hold phase or the initial attack time. Drag the field vertically.
Amp Envelope Sustain handle and field: Drag vertically to set the sustain level, which is held until you release the key. Drag the field vertically.
Amp Envelope Release handle and field: Drag horizontally to set the time it takes for the envelope to fall from the sustain level to a level of zero. Drag the field vertically.
Amp Envelope Velocity slider: Set the sensitivity of amplitude envelope modulation in response to incoming velocity data.
If the Velocity slider is set to zero, the envelope outputs its maximum level when you strike the keys at any velocity.
At a Velocity slider value of 100%, the entire dynamic range is under velocity control.
To explain, raising the slider value reduces the envelope minimum amplitude, with the difference being dynamically controlled by keyboard velocity. For example, when you set the Velocity slider to 25%, the minimum envelope amplitude is reduced to 75%. The remaining 25% is added in response to the velocities of keys you play. A key played with a zero velocity results in an envelope amplitude of 75%. A key played with a MIDI velocity value of 127 will result in an envelope amplitude of 100%. When you raise the Velocity slider value, the minimum amplitude decreases even further.
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