SYSTEM - Streaming
The first column contains controls for the streaming function in Omnisphere. Streaming permits samples to largely reside on disk. In this way you can use large samples with a relatively small amount of memory.
Streaming Mode engages or disengages disc streaming in Omnisphere. If you disable disc streaming by selecting "Not Streamed" your sounds will take longer to load, take up more RAM, and Omnisphere will warn you with a message:
When using Omnisphere on a PC it's recommended to leave STREAMING MODE set to "Streamed" unless for some reason you need to disable hard drive streaming and have lots of physical memory.
On Mac's there is an additional mode called "Server", which is short for Sample File Server. Please refer to the Sample File Server page for more details.
NOTE: On the Mac version of Omnisphere, Server is enabled by default. Do not change it to "Streamed" unless directed to by Spectrasonics support.
Pre-Load Memory Size
Determines how much memory is devoted to sample pre-load. The higher the settings, the less likely that glitches will occur due to streaming problems. However, turning it up requires more memory and will increase the load time for Soundsources.
Recommended values are between 22,000 to 66,000, with 60,000 as the standard default value. If patches make use Timbre or Sample-Start, this parameter might need to be raised over 40,000.
NOTE - Soundsources must be reloaded when changing this parameter before the new value will take effect.
Range - 1000 samples to 100,000 samples
The control balances system resources between streaming and other operations. This is the second most important streaming parameter, after the Pre-Load Memory Size. It should generally be set to a moderate value around 0.1. Values above 0.5 may lead to streaming glitches due to deferring streaming reads in order to give priority to other processing operations in the application. Turning it down to zero may cause glitches in other operations due to the streaming monopolizing the CPU. There is a relationship between this parameter and the Num Bytes Per Read parameter. When that parameter is turned up, this parameter should generally also be turned up.
Range - 0.00 seconds to 1.00 seconds
The numbers in this are diagnostic numbers that are used for Customer Support purposes.