User manual

UAD Powered Plug-Ins Manual - 65 - Using UAD Powered Plug-Ins
Note: Keep in mind the latency for each instance of UAD Powered Plug-Ins
is equal to twice the current buffer size of the host system. This is because au-
dio needs to travel to the UAD card, then back again. For example, with a
buffer size of 256 samples, one Powered Plug-In will introduce 512 samples
of latency, and two Powered Plug-Ins in succession will introduce 1024 sam-
ples of latency.
DSP Usage
The UAD card features an on-board CPU and 4 MB of memory for processing
Powered Plug-Ins. The host system memory and CPU are never used for Pow-
ered Plug-Ins processing. However, there will always be a small amount of
load on the host CPU induced by PCI data transfer and user interface opera-
tions. This is unavoidable when using a DSP card.
• UAD CPU usage is proportional to the host application sample rate and sys-
tem PCI bus speed. Therefore, more plugins can be used simultaneously in
a 44.1K session than in a 96K session, and likewise a higher speed PCI bus
will use less CPU load than a slower bus.
• Bypassing individual components will conserve CPU. For example, bypass-
ing the compressor in the EX-1 when only the EQ is in use, and/or bypass-
ing any of the unused bands of the EX-1 EQ will use less UAD CPU.
• The UAD CPU resources required by each successive UAD Powered Plug-In
instance will slightly decrease.
• A chart showing expected plugin counts can be found on our website:
http://www.uaudio.com/support/software/UAD/charts.html
Tempo Sync
As of version 4.0, the time-based parameters of several UAD Powered Plug-
Ins can be synchronized to the tempo of the host application using the Tempo
Sync feature.