10.6

363Logic Pro Instruments
If you break down any sound over time, you can emulate snare drum-like, piano-like, or
string-like characteristics easily with Retro Synth envelopes.
Envelope parameters
• Attack handle: Drag horizontally to set the time it takes for the envelope to reach the
initial level.
Note: Oscillators automatically switch from free mode to synced mode when the Attack
time is set to values below 0.50 ms. This has a pronounced effect on stacked voices, in
particular. See global and controller settings.
• Decay handle: Drag horizontally to set the time it takes for the envelope to fall to the
sustain level, following the initial attack time.
• Sustain handle: Drag vertically to set the sustain level, which is held until the key is
released.
• Release handle: Drag horizontally to set the time it takes for the envelope to fall from
the sustain level to a level of zero.
• Velocity slider: Determine how sensitive the envelope is to incoming velocity.
• If the Vel slider is set to zero, the envelope outputs its maximum level when you
strike the keys at any velocity.
• At a Vel 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 Vel 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. So, 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 Vel slider value, the minimum amplitude decreases even further.