Dynacord DSP 600, Owner'S Manual

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When configuring a PA or loudspeaker system, there are a variety of different scenarios that will require time alignment
or delay compensation. Some of the different scenarios are:
Some applications will only encounter a few of these needs, while others will encounter all of them, such as in a theater
with a center cluster of horn-loaded loudspeakers, subwoofers, and under balcony delay speakers.
With other DSP products, a designer must make use of only one or two delay sections, which means that a designer
must carefully think about how to calculate delays, how to add offsets to individual channels so that delay section can
perform multiple tasks. This can result in a confusing DSP structure and more potential for delays being adjusted im-
properly. The DSP 600 provides dedicated delay sections to perform each of these delay scenarios independently,
which provides easier setup, adjustment and programming.
SIGNAL GENERATOR
The integrated signal generator of the DSP 600 can generate following signal types:
Please see page 20 for details about available parameters and configuring the signal generator.
I
NPUT
P
ARAMETRIC
EQ (PEQ)
Use the < SELECT > buttons to make the top line of the Edit screen active and the Value Up and Down buttons
to navigate to the Input PEQ screen. The DSP 600 provides a stereo 10-band multi-mode filter generically
referred to as the Input PEQ (Parametric Equalizer).
The Input PEQ is a very powerful and complex set of multi-mode filters. Care must be given configuring these filter
bands, as they interact and can produce unexpected results. Using the IRIS-Net application is strongly recommended to
set all but the most simple eq curves.
Each band of the Input PEQ can be configured for a specific filter type, frequency, slope or Q and gain setting. Attention
must be paid to the ultimate output gain through the rest of the DSP 600’s audio path, as it is possible to boost frequen-
cy ranges to the point where the internal or external audio paths of the system may be clipped. Monitoring the output
VU meters of the DSP 600’s output channels will indicate internal clipping; the input meters of connected amplifiers
should do the same. The following section details the type of filters that can be selected for each of the Input PEQ’s 10
bands and their parameters.
Low shelf (Loshelv)
The Low-shelf filter is a “hinge” type; in that frequencies below its frequency setting can be boosted or cut; hinging on
the cut-off Frequency. The amount of boost or cut (Gain), and the extent of width of the filter’s transition band (Slope),
are determined by the low-shelf filter’s settings. (See Response/Q and Gain.) Use the < SELECT > buttons to navigate
to the filter setting you wish to adjust, and the Value Up and Down buttons to alter these settings. Press the Value Up
and Down buttons once to increment values by one unit, or press and hold to scroll rapidly through available values.
(Values do not wrap around.)
• Delaying a set of loudspeakers to act as under-balcony fills or delay towers in a concert PA
• Aligning a PA system to the sound source on a stage, or aligning the "tops" to the "subs"
• Timing correction to compensate for the offset acoustic centers of individual transducers within a loudspeaker cabinet
• Delay offset for one or more loudspeakers in a cluster to improve coverage and overlap effects
• Sine signal
• White Noise
• Pink Noise
Filter type Frequency Slope Resp / Q Gain
Loshelv
20 to 20000 Hz
6dB/oct.
12dB/oct.
-
-18.0 to +12.0 dB
Hishelv
6dB/oct.
12dB/oct.
-
PEQ - 0.40 to 40
Lopass
6dB/oct.
12dB/oct.
-
0.4 to 2.0
-
Hipass -
Table 5-7: Input Channel Parametric EQ
IN A:PEQ1 Active
Type: Hipass F: 20000.0Hz
Slope: 12dB/oct Q: 2.0