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1 - Introduction & Installation
Setting up the Preferences
Audio Preferences
Streaming
When you load a Proteus X bank (with Streaming on), you are not actually loading the
sample files themselves into your computer's RAM. Only the preset information and the
first few seconds of the sample are loaded. The rest of the sample data is taken directly
from the hard disk when needed.
This streaming technique makes fast loading times possible even when using huge
banks that would clog a RAM-based sample player. Multi-layer, minute-long, stereo
samples on each key are no problem for Proteus X. Sample streaming technology is not
new. It was originally developed for hard disk audio recorders so that fast punch-ins and
punch-outs could be achieved.
You have the option to enable or disable streaming audio. If streaming is turned off, the
Proteus loads (or attempts to load) the entire bank into your computer's RAM.˙
If streaming is so great, why would you ever want to turn it off? Well, if you're using your
computer as an audio workstation, performing multiple simultaneous functions, sooner
or later, you'll exceed your computer's CPU, memory or disk access resources. Sample
streaming makes very heavy demands on your hard disk. If you're recording other audio
tracks, using multiple software plug-ins and playing Proteus X with a lot of voices, you
may run into a disk access bottleneck. By disabling streaming and loading the bank into
your unneeded RAM, your hard disk can be reserved for more critical operations.
Pre-roll
This important control allows you to set how many seconds of each sampl e should be
loaded into RAM when the bank is loaded. This setting greatly influences the perfor-
mance of Proteus X when streaming is on. The setting you choose depends on: the
number of samples you want to use and the amount of RAM you want to dedicate to
Proteus X.
The smaller the pre-roll, the more disk access will be required for sustained sounds.
Frequent disk access can overtax your computer system depending on its speed and the
number of other disk dependent applications you have running. Large pre-roll times
will improve polyphony and performance at the expense of system RAM and slower
bank loading. If you set the pre-roll high enough, the entire bank will be loaded into
RAM and no disk streaming will occur.
16
If you get an error
message when trying to
open a file, the file may
be too large to fit into
RAM. Turn streaming on.
Tip: Decrease Pre-roll
f
time for fast load times
when auditioning sounds
and creating new banks.
Increase pre-roll time
when you're playing
many notes or dense
sequences.
Proteus X Operation Manual
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