• New generation of XDSP signal processing for NEXUS
  • ISOSTEM upmix algorithm optional
  • Individually combinable signal processing modules

 data sheet (285 KB)

The new NEXUS XDSP signal processing board supplies significantly increased processing power and reserves for resource intensive applications while being no larger than its predecessor and lower in weight. Load can be allocated across different processing modules, which can be combined in any manner to meet sophisticated requirements. The GUI provides a visual overview of the order in which modules' are placed and connected, and enables individual audio parameters to be adjusted.

logo isostemStage Tec optionally integrates the ISOSTEM method from DSPECIALISTS into the new board. It generates a proper multichannel mix from stereo input signals in real time, which is fully reversible.

New Features

  • Powerful signal processing: four times that of XDSP 04
  • XDSP 06 Higher crosspoint capacity in gain delay matrices
  • New modules: Band filter, upmix algorithm (ISOSTEM)
  • Finer resolution in frequency settings for EQ & filter
  • Larger RAM storage for longer signal delays
  • User-friendly GUI provides overview for fast access to audio parameters and the switching sequence of signal processing modules

The modules in detail

  • New generation of XDSP signal processing for NEXUS
  • ISOSTEM upmix algorithm optional
  • Individually combinable signal processing modules

 data sheet (285 KB)

The new NEXUS XDSP signal processing board supplies significantly increased processing power and reserves for resource intensive applications while being no larger than its predecessor and lower in weight. Load can be allocated across different processing modules, which can be combined in any manner to meet sophisticated requirements. The GUI provides a visual overview of the order in which modules' are placed and connected, and enables individual audio parameters to be adjusted.

logo isostemStage Tec optionally integrates the ISOSTEM method from DSPECIALISTS into the new board. It generates a proper multichannel mix from stereo input signals in real time, which is fully reversible.

New Features

  • Powerful signal processing: four times that of XDSP 04
  • XDSP 06 Higher crosspoint capacity in gain delay matrices
  • New modules: Band filter, upmix algorithm (ISOSTEM)
  • Finer resolution in frequency settings for EQ & filter
  • Larger RAM storage for longer signal delays
  • User-friendly GUI provides overview for fast access to audio parameters and the switching sequence of signal processing modules

The modules in detail

+ Gain and delay

Adjustment of gain, delay time phase reverse, mute as well as link and copy (grouping of multiple channels and copying the
parameters set to other modules)

Maximum number of input channels 160
Level control 1-dB steps Off, from -75 dB to +15 dB
Delay adjustable in ms / s / frame / meter,
with 0.1-ms steps
0 to 8000 ms
Delay Bypass on/off
Phase inversion on/off
Mute on/off
Copy and link audio parameters to other channels on/off

+ Equalizer & Filter

The parametric equalizer can contain up to 30 filters. The following modules are available:

  • Peak filter
  • High and Low shelf filters
  • Low-pass and High-pass filters
  • Notch filter (Frequency in 1-Hz steps)
  • New: Bandpass filter (Frequency in 1-Hz steps)
  • New: 90° Filter
Graphical overview yes
Bypass on/off
Copy function yes
Q, Bandwidth from 0.5 to 9
Frequency range 240 steps in a scale from 20 Hz to 20 kHz
Gain from -15 dB to +15 dB
Delay from 0 ms to 200 ms

+ Dynamic processing modules

  • Various modules for adjusting audio signal dynamics.
  • There are 320 modules available. Several modules can be assigned to one channel.

Configuration options:

Com-
pressor
Ratio Threshold Output Gain Attack Release Hold
minimum/
maxim
from 1:1 to 1:50 (Lim) from -40 to 0 dBFS from 0 to 63.8 dB from 0.04 to 399 ms from 10 to 10000 ms from 10 to 10000 ms

 

Limiter Ratio Threshold Output Gain Attack Release Hold
minimum/
maximum
1:50 fixed from -40
to 0 dB
from 0 to
63.8 dB
from 20 to 399 ms from 10 to 10000 ms from 10 to 10000 ms

 

Expander Ratio Threshold Output Gain Attack Release Hold
minimum/
maximum
from 1:1
to 5:1
from -65 to 5 dBFS from 0 to 63.8 dB from 20 to 399 ms from 10 to 10000 ms from 10 to 10000 ms

 

Gate Ratio Threshold Output Gain Attack Release Hold
minimum/
maximum
50:1 fixed from -65 to 5 dBFS from 0 to 63.8 dB from 20 to 399 ms from 10 to 10000 ms from 10 to 10000 ms

+ Sample delay, Crossover and Sum matrices

Sample delay

  • Delay of audio signal in samples to compensate delay times.
Maximum number of units 18
Sample delay from 0 to 500 samples
Increment settings 1 sample

Crossover

  • Crossover filters can be used to connect to active speaker systems.
Crossover frequencies from 20 to 20 kHz
Filter quality (Q) dB/Octave 6 / 12 / 18 / 24

Sum matrices

  • Matrices for summing multiple inputs to one output.
  • Flexible combination of the size of the matrices and number of each channel.

Examples:

  at 48 kHz at 96 kHz
4-in-1mixers 63 63
8-in-1 mixers 31 31
16-in-1 mixers 15 15

 

Gain Phase reverse Mute Link function Copy function Bypass
Off to +15 dB on/off on/off on/off on/off on/off

+ Mono Mixer, Gain-delay matrix, De-Esser, N-1-matrix mix-minus one and ISOSTEM Upmix-Tool

Mono Mixer

  • Mixes two signals (mono or stereo) into one mono signal with 3 dB gain reduction.
  • 150 mono mixers are available for configuration.

Gain-delay matrix

  • The gain-delay matrix enables the simultaneous distribution of input signals to multiple outputs. Gain and signal delay can be configured individually for each crosspoint. Among other things, this function is useful for controlling distributed speaker systems.
Gain Delay Phase reverse Mute Bypass Link function
from -145 dB to +15 dB from 0 to 200 ms on/off on/off on/off on/off
Crosspoints 2 matrices with a maximum of 1000 crosspoints each, at 48 kHz

N-1-matrix mix-minus one

  • Conference call: Every participant can hear all others, but not his or her own signal

De-Esser

  • A module that automatically reduces voiceless sibilants in speech and singing using a notch filter
  • Presets for male and female voices available
  • User presets are storable
  • Easy handling because of a dedicated catalogue of operations with only three parameters: frequency, quality and threshold -40 to 0 db
  • Up to 128 modules configurable

ISOSTEM Upmix-Tool

  • Generate multichannel (5.1) from a stereo signal and vice-versa
  • Lossless conversion in real time
  • Stereo-compatible downmix
  • Predefined presets available and accessible through control software or NEXUS logic
  • Loading alternative presets possible
  • Two units at 48 kHz possible
  • Licence optional

+ Comparison of the technical specifications: XDSP04 and XDSP06

XDSP04 and XDSP06

Comparison of the
technical specifications
XDSP04
@48 kHz
XDSP04
@96 kHz
XDSP06
@48 kHz
XDSP06
@96 kHz
Performance factor 1 1 4 4
Fader 64 48 255 255
Delay RAM memory 20 s 10 s 20 min 10 min
Fader delay combination 24 units
(800 ms)
12 units
(800 ms)
160 units
(8000 ms)
80 units
(8000 ms)
Dynamics units 56 28 320* 160
12-band-EQ 36 18 200 100
12-band-EQ with Delay 24 12 96 48
30-band-EQ with Delay 14 7 66 32
Mono mixers 64 32 125 125
4-into-1 mixers 32 16 63 63
8-into-1 mixers 16 8 31 31
16-into-1 mixers 8 4 15 15
Crosspoint capacity for
the gain-delay matrix
4 matrices
with 64
crosspoints
2 matrices
with 40
crosspoints
2 matrices
with 1000
crosspoints
2 matrices
with 500
crosspoints
Upmix-Tool (ISOSTEM) - - 2 -

* Several modules may be used in one channel. Supports a maximum of 255 channels.

 

XDSP04

XDSP06

Data formats 24-Bit Audio Resolution (NEXUS System)
Inputs and outputs 255 In/64 Out 510 In*/255 Out
Calculation accuracy Internal 40-Bit-Floating Point Format (IEEE 754/854)
Bus 32 Bit
Sampling rates 44.1 kHz / 48kHz / 88.2 kHz / 96 kHz
Signal processors 4 x ADSP 21062L 2 x ADSP 21469
Clock rate
External 40 MHz 25 MHz
Internal 160 MHz 450 MHz
Power supply Voltage +4.75 to 5.25 V
Current 850 mA 560 mA
Operating conditions
Temperature range 0° C to +50° C
Humidity 90 % (maximum), non-condensing
Storage conditions Temperature range -35° C to +70° C
Humidity 90 % (maximum), non-condensing
Mechanical data
General board for 19" module frame, 3 U, 340 mm
Front panel 4 HP (20.02 mm x 128.5 mm)
Required slot space 1
Weight 0.280 kg 0.187 kg

* maximum 256 channels at the same time