miniDSP Ltd, Hong Kong /
/ Features and specifications subject to change without prior notice
21
4.3
C
ONFIGURING BACK
-
END PROCESSING
If you intend to run a configuration that is more than straight stereo room correction processing, then you will
need to configure the back-end processing prior to running Dirac Live calibration. Typically, this applies to
applications such as subwoofer integration and two-way active speakers.
If you are using straightforward stereo room correction processing with a pair of speakers, you
don’t need to read the rest of this section. In that case, proceed to
Dirac Live calibration using the
separate
miniDSP Dirac Live User Manual
4.3.1
Signal flow
To understand how the DDRC-24
combines Dirac Live with miniDSP’s audio processing, refer to t
he signal flow
diagram in Figure 1:
•
One of the stereo input sources is selected by the user and passed to two channels of Dirac Live processing
for digital room correction.
•
The outputs from Dirac Live, labeled “Dirac 1” and “Dirac 2” in the plugin UI, are routed and mixed to the four
output channels.
•
Each output channel has a comprehensive set of DSP functions. These are all optional
–
you can configure
them if you want to, according to your particular application.
As indicated in Figure 1, the processor is configured by two different software applications. The
DiracLive
application runs room measurements and loads correction filters into one of four presets. The
DDRC-24 plugin
configures back-end processing for each of the four presets. When a preset is selected (e.g. with the front panel
or remote control), the corresponding Dirac Live filters
and
the plugin configuration are loaded into the working
DSP memory.
While the description of the signal processing flow is from inputs to outputs (left to right in the diagram), the
order in which you configure the processor is usually the reverse, for reasons described on the next page.
Figure 1. DDRC-24 signal flow diagram
