Introduction; Features - PROEL DSO26 User Manual

DSO26 User Manual

INTRODUCTION

The DSO26 is a powerful DSP based audio processor, ideally suited for live sound
applications, where it combines the functions of a multitude of conventional products in a
compact 1U unit. To achieve this, the DSO26 has two inputs and six outputs which can be
configured in five basic crossover modes – 3 x 2 way; 2 x 3 way; 4 way; 5 way; and 6 way.
Each input has a gain control, and variable base delay. Each output has a gain control,
variable delay, high and low pass filters, five bands of fully parametric equalisation, polarity
switching and, additionally, a fully featured limiter.
Multi-part security lock-out is available for all controls.
The DSO26 is also available with optional AES/EBU digital inputs and outputs.
It has been designed for quick, intuitive adjustment through the use of multiple controls to
provide an easy-to-use interface.

Features

Superb audio quality – carefully optimised double precision signal processing
coupled with a 40-bit internal data path ensures a dynamic range in excess of
110dB. The high sampling rate means minimal filtering providing exceptional sonic
purity.
A flexible 2-input/6-output multi-mode format caters for any crossover configuration,
regardless of scale.
A total of 30 parametric equalisation bands are available, each providing +15 to –
30dB of gain at centre frequencies between 20Hz and 20kHz, with a wide range of
'Q's available between 0.4 to 128. All parameters feature fine resolution with 1/36
octave frequency steps, 0.1dB gain increments, and 100 'Q' settings. Any
parametric section can also be set to operate as a high or low shelving filter.
Each output features a high performance limiter, provided with complete control
over attack, release and threshold parameters. To aid set-up, the output meters
show headroom to the limiter threshold, and use time constants that track those of
the limiter to display precise power usage.
Each output features variable high and low pass filters, with a choice of 12, 18 or
24dB/Octave roll-off, and Butterworth, Bessel or Linkwitz-Riley responses.
Independent control of each high and low pass filter allows asymmetric crossover
bands to be created.
Delay of up to 650mS may be independently set for each output, with an
exceptionally fine minimum increment of 2.6µS.
Three velocity-sensitive encoders provide a familiar and intuitive control format with
all filter information displayed simultaneously on a backlit LCD screen.
AES/EBU Digital input and output interfaces are available as an option.
Input and output balancing transformers are also available as an option.
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