Lab.gruppen DSP 24B Brochure

lab.gruppen / DSP24
DSP 24 and DSP24B
Features
2 in 4 out speaker
processor
Controlled with
VIEW , a
proprietary software
that is included and
runs on Windows 95/
98/NT
Pseudo FIR (Finite
Impulse Response)
filters of up to 8192
taps on each output
Up to 66 band
equalization on each
output
Crossover filters
with 0 - 96 dB/octave
slopes, any
characteristics
High resolution
magnitude and
phase compensation
of the individual
drivers is possible
with VIEW Pro
http://www.labgruppen.com/lab.dsp.html
The DSP 24 is a 2 in and 4 out digital crossover and speaker
equalization unit, which offers outstanding versatility for installed or
touring sound systems.
The DSP 24 combines the function of a 2-way stereo or 3/4-way mono
active crossover unit, with a system equalization corresponding to a 66
band parametric equalizer. In addition, each output of the DSP 24 also
has independent time delay, to acoustically align the speakers and/or
drivers. Each output also has a mute switch, a digitally programmable
analog gain control and limiter threshold with front panel control knobs.
All crossover and equalization filters are performed digitally in the time
domain with a pseudo FIR filter - a combination of FIR (Finite Impulse
Response) and IIR (Infinite Impulse Response) which together emulates
an FIR filter of up to 8192 taps. Using FIR filters makes it possible to
create filters with the amplitude and the phase independent of each other,
which enables the DSP 24 user to create filters with mixed phase
characteristics. Conventional minimum phase filters can also be created,
with any curve or characteristic, with no computing latency.
The digital crossover filters in the DSP 24 can employ up to 96 dB/
octave filter slopes.
The system equalization and crossover filters in the DSP 24 are user
definable in VIEW, a proprietary software package running on a PC. It
takes the user step by step to determine all system parameters. A library
of default setups and a library of amplifier and speaker specifications are
also included, to which the user can add any amplifier or speaker.
The system equalization can be created by entering one or preferably
several speaker measurements into the PC. The software then suggests a
"best fit" equalization, with accuracy never achieved before (more
information is available in the VIEW brochure and
the dba audio website ). All parameters created by the software are then
transmitted to one or several DSP 24 units via the serial communication
or memory card, and stored in a non-volatile memory. Up to 16 setups
can be stored in each DSP 24 unit. The DSP 24 can be used without the
PC and the setups can then be selected with the switches on the front
panel. The software also supports several protect functions, to prevent
unwanted changes of the parameters and front panel settings. It also
prevents copying of the filter parameters without a user password.
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