In addition to Special Articulations, Soundsources may also include multiple Round Robin samples and velocity-switched samples.

For this reason, a fully loaded Soundsource can use quite a bit of memory. The SAMPLE THINNING interface helps to manage the use of those resources.

By limiting the number of Round Robin samples, or velocity-switched samples, or by turning off Legato Soundsources, you can dramatically reduce the amount of memory used.


This enables and disables Sample Thinning. Changing the status of this button will cause the Soundsource to be reloaded.


To limit the number of Round Robin samples that are loaded, select an option from the Round Robin menu.

You can choose a setting that ranges from “No RR” to “At Most 16 RR”. Select “No Limit” to allow all Round Robin samples to be loaded.


When turning this button on Release Soundsources will ignore the limit set on the Round Robin menu. Many times it is useful to limit the number of Sustain Round Robins to save resources. Release samples don’t take as much memory, so allowing all Release Round Robin samples to be loaded can help providing a lot of character and realistic results.


Soundsources can include a very large number of velocity-switched samples, which is great for very realistic and expressive playing. However, if you need to conserve system resources, you can choose to thin the amount of velocities using this menu.

No Limit

  • Loads all velocity-switched samples.

Every other

  • Loads every other velocity-switched sample.

Every third

  • Loads only every third velocity-switched sample.

Every fourth

  • Loads only every fourth velocity-switched sample.

Velocities above

  • Selecting a value from this menu, for example, 64, will only load velocity-switched samples mapped to a Velocity of 64 and above.

Velocities below

  • Selecting a value from this menu, for example, 100, will only load velocity-switched samples mapped to a Velocity of 100 and below.

NOTE: When thinning Velocities, there are no gaps in the sound. The remaining velocity-switched samples will adjust to be triggered across the full Velocity range.


NOTE: Omnisphere sounds don’t currently include Legato Soundsources, so this control will have no effect on Omnisphere Soundsources. It is most useful when loading Trilian sounds into Omnisphere.

This menu has two options, No Limit and None, which determine whether or not Legato Soundsources are loaded with the sound.

If No Limit is selected, Legato Soundsources will be loaded if the Soundsource has Legato Soundsources associated with it. If None is selected, the Legato Soundsources will be unloaded.

NOTE: You can think of the difference between the Legato Thinning menu, and the Use Legato SS button in this way: The Legato menu controls whether or not the Legato Soundsources will be loaded, while the Use Legato SS button determines the behavior of the Part (whether it will “solo” notes played Legato that are half step or a whole step apart).


A Soundsource can contain thousands of samples mapped across the full keyboard range. Sample Thinning lets you limit the samples that are loaded to match either a “trained” range of played notes, or a selected Scale or Interval. Using Pitch Thinning can substantially reduce the number of samples loaded with the Soundsource.

NOTE: Although only a limited set of samples will be loaded, this won’t result in “silent zones” on the keyboard. All notes will still play because the remaining zones will be stretched across the sample map.

Trained Pitch Thinning

With Trained Pitch Thinning, you can load only the samples used during a performance.

For example, if you are working on a simple melodic phrase that has notes in a limited range, say from C2 to C4, by using Trained Pitch Thinning, you can speed up load times, and reduce memory usage by loading only the samples used in that range.

If you have recorded an Omnisphere part in a song, and want to speed up load times and conserve memory, you can apply Trained Pitch Thinning by playing the MIDI clip in the host. Omnisphere will then only load the samples used in the actual phrase.

To use Trained Pitch Thinning, select the BEGIN TRAINING button. Play a range of notes (or a MIDI clip in the host), and then select the FINISH TRAINING button. This will limit the loaded samples to the note pitches that were played during training.

Pitch Thinning Using Scales & Intervals

To limit loaded samples to a specific Scale or Interval, select the Pitch Thinning drop-down menu, and select an option from the available sub-menus. You can select from Major or Minor Scales, or from a variety of Intervals.

NOTE: The Pitch Thinning options on the Soundsource Zoom Edit View are the same as those found on the Patch and Multi Browser “Lite Version” Zoom. However, the Browser’s Lite Version feature affects the entire Patch or Multi, while the Soundsource Zoom options affect only the individual Soundsource. Using the Soundsource Zoom thinning options, you can apply different thinning options to each Layer in a Patch.


Turning this button ON will limit the key range of certain Soundsources. This feature currently works on some kalimba Soundsources from the Core Library. Enabling this option will limit the playing range of these Soundsources to the actual ranges of the instruments from which they were sampled. When this option is disabled, the key range is extended across the entire keyboard.

NOTE: All Thinning options applied here are saved with the Patch or Multi, and are recalled the next time you load them.

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