Installation guide

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optimisation will design a filter that typically exceeds both the error tolerances that are specified,
but uses all of the delay specified in Maximum Delay. If delay in the filter is not critical, this option
is advisable because it produces the best filters (least error) for that particular delay value. In fact,
the most phase and time correction can be achieved by specifying the largest amount of
Maximum Delay, while optimising for Minimum Error.
All of these parameters default to reasonable values, so it is suggested that they not be modified
unless you understand the effects of each of them.
A brief description of the delay in the PDC
The delay discussed above and that can be controlled by the user using the Maximum Delay
parameter is just the delay that arises from correcting the frequency and phase of the driver(s) or
speaker. This is not the total delay that will be introduced into the system by the PDC. The total
delay is
Total delay = Processing time (2.33 ms digital to digital and 4.09ms analog to analog) +
frequency & phase correction delay + linear phase crossover delay + automated driver alignment
delay + manual speaker alignment delay
The linear phase crossover delay will be present only if you are using linear phase crossovers - ie
if you have a bi-amp or tri-amp configuration, or if you have used linear phase crossovers
between main speakers and subwoofers.
The automated driver alignment delay arises from the relative delay between drivers as detected
during the measurement process. This figure will also allow for any time alignment between the
drivers of a pair of speakers that are corrected together.
The manual speaker alignment delay is an optional delay set by the user to time-align speakers
that are differing distances from the listening position. This is set during PDC configuration - see
PDC Configuration Parameters.
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The PDC Import Wizard can be used to import MLSSA (.TIM) files, (provided that they have a
sample rate of 48kHz) and text based files such as frequency-response data (.FRD and .FM) files.
For more information on text based frequency-response data files go to
http://www.pvconsultants.com/audio/frdis.htm.
To start the PDC Import Wizard, choose File - Import Measurement. At the first window of the
PDC Import Wizard, just click Next, or, if you have more than one project loaded, select the
project into which you wish to import the data, then click Next. At the second window, select the