Restrict ES2 randomization in Logic Pro for iPad

You can restrict randomization to particular groups of parameters with the RND Group pop-up menu.

Some aspects of your sound may already be ideal for the sound you had in mind. For example, your sound setting has a nice percussiveness, and you’d like to try a few sonic color variations while retaining this percussive feel. To avoid the random variation of any attack times, you can restrict the variation to oscillator or filter parameters. You do this by setting the RND Group to Waves or Filters, thus excluding the envelope parameters from the variation process.

Note: The Master Level, Filter Bypass, and oscillator on/off parameters are never randomized. Also, randomizations of the Vector Envelope turn the Point Solo parameter off.

You can restrict random sound variations to the parameter groups outlined below:

Randomize Group				Comments
All				All parameters, with the exception of those mentioned above, are randomized.
All except Mod Matrix+Pitch				All parameters, with the exception of router parameters and the basic pitch (semitone settings of the oscillators), are altered. Oscillator fine-tuning is, however, randomized.
All except Vector Env				All parameters, with the exception of Vector Envelope parameters, are altered. This maintains the rhythmic feel of a given setting.
Waves				Only the oscillator Wave and Digiwave parameters are altered. Other oscillator parameters (tuning, mix, and modulation routings in the router) are excluded.
Digiwaves				New Digiwaves are selected for all oscillators. Other oscillator parameters (tuning, mix, and modulation routings in the router) are excluded.
Filters				The following filter parameters are varied: Filter Structure (series or parallel), Filter Blend, Filter Mode, Cutoff Frequency, and Resonance for Filters 1 and 2. The Fatness and Filter FM parameters of Filter 2 are also randomized.
Envs				All parameters of all three envelopes (ENV 1, ENV 2, and ENV 3) are randomized. The Vector Envelope is excluded.
LFOs				All parameters of both LFOs are varied.
Mod Matrix				All parameters—in all modulation routings—are varied (all intensities, target, via, and source parameters are changed).
FX				All effects parameters are randomized.
Vector Envelope				All Vector Envelope parameters are varied, including the X/Y routing of the Planar Pad.
Vector Env Mix Pad				The oscillator mix levels of the Vector Envelope points are altered. The rhythm and tempo of the modulation (the time parameters of the points) are not changed.
Vector Env XY Pad Options				The X and Y values of Vector Envelope points are randomized. The X/Y routing, however, is not changed. The rhythm and tempo of the modulation (the time parameters of the points) are also left unaltered. You can specify a single direction for randomization by choosing either: Vector Env XY Pad X only Vector Env XY Pad Y only
Vec Env Times				Only the time parameters of the Vector Envelope points are altered.
Vec Env Structure				The Vector Envelope structure is altered. This includes: All times, the Sustain point, the number of points, and all loop parameters.
Vec Env Shuffle Times				The Vector Envelope shuffle times (within loops) are altered. This includes the Loop Smooth value, if Loop Mode is set to Fwd or Bwd.

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Logic Pro User Guide for iPad

Restrict ES2 randomization in Logic Pro for iPad