AX32 | DX32
AX32 | DX32
Audio Interface
Pristine Audio Converters
with versatile I/O structure
and superb sonic quality
DAD – Digital Audio Denmark
by NTP Technology
Digital Audio Denmark
DAD – Digital Audio Denmark was founded in 1999 and
has since 2008 been a brand owned by NTP Technology.
The vision of DAD has always been to develop analogueto-digital and digital-to-analogue conversion interfaces
with the best possible sound quality. With the continuing
development and improvement of digital pro audio
applications in general, the developments by DAD have
an increased focus on signal processing and digital
integration to many platforms.
Pristine A/D and D/A converter with superb
sonic quality and versatile audio I/O structure
The DAD development team recognises that transparent
A/D and D/A conversion is of the utmost importance to
the sonic and artistic success of a sound production. It is
essential in preserving the musical details of acoustic and
electronic instruments so that the actual conversion
process is inaudible.
The AX32 by DAD provides the highest possible audio
quality. Its outstanding audio specification includes up to
128 dB dynamic range, a harmonic distortion below -120
dB, low jitter, high-precision clock circuitry, and a sonic
quality which is true to the analogue sound.
One of the benefits of DAD being a part of NTP
Technology is the access to the legacy of advanced audio
routing, signal processing and digital I/O technology that
have been a part of the NTP routing products for decades.
By adding this technology to the DAD converter designs
the most powerful combination of sophisticated
conversion and router technology is possible. Once you
have tried the AX32 by DAD, you will never settle for less.
What are the units?
The DAD AX32 and DX32 products are based on the same
implementation of conversion, routing, signal processing,
I/O and control. The AX32 is a 2RU 19” rackmount unit
with a modular section for installation of different I/O
cards, and a general digital I/O and control section. The
DX32 is a 1RU 19” rack mount unit, which is functionally
identical to the AX32, but without the card slot option for
insertion of the I/O cards.
AX32 Analogue Mic/Line AD/DA/DD interface
and router
AX32 is a light-weight and compact unit which can be
configured with up to six 8-channel A/D or D/A cards
providing for a total of up to 48 analogue input and
output channels. The A/D card features an optional mic
pre with astounding sound quality.
The AX32 base unit includes as standard a 64 ch. Pro
Tools™ HD/HDX interface, a coax MADI I/O and eight
AES3 stereo I/O. The base unit can be upgraded with a
further two MADI I/O and a Dante AoIP option.
Further option cards include a dual MADI I/O card and an
AES3 card with 8 stereo pairs. The AX32 can be
configured with up to 8 of these cards as alternatives to,
or in combination with, the analogue cards.
Any input channel can be routed to any output channel
and even to multiple outputs simultaneously thereby
providing a flexible interface to any DAW and even to
multiple DAWs simultaneously.
DX32 Digital interface and router
The DX32 is a high capacity and compact digital audio
bridge which provides fast and flexible connections
between Pro Tools HD/HDX, MADI, AES and Dante. Any
input channel can be routed to any output channel and
even to multiple outputs simultaneously making the
DX32 the ideal choice for audio routing, digital format
conversion and distribution.
In addition the DX32 includes PPM measurements on all
input and output channels and can also be configured
with the optional Pro | Mon monitor control.
Major users of DAD audio converters
include:
Abbey Road Studios | Acoustic Recordings |
Alchemy Mastering | Bauer Studios | Benny
Andersson’s RMV Studio | Classic Sound |
CMC Studios | Collegium Records | Danish
Radio | Deutsches Filmorchester Babelsberg |
DEX Mastering | DPA Microphones | Echopark
Studios | Hana Music Montreux | Helsinki
Music Centre | Lindberg lyd | McGill University |
Moscow Music Conservatory | NDR Hamburg |
NHK | Opéra de Dijon | Radio France
Internationale | Royal Danish Opera House |
Royal Opera House London | Sidney Opera
House | SK Works | Slovak Philharmonic
Orchestra | St Petersburg Philharmonic
Orchestra | Stock Fish Records | Swedish
Radio | Swineshead Productions | Telarc
International | Ultimo Productions and the
Warsaw National Philharmonic Orchestra
IP Ethernet/
LAN
Input
signals
Dante/AES67
Pro Tools
MADI
AES3
3G SDI
Analogue
Advanced signal routing and Dante / AES67
AoIP via IP Ethernet
The standard I/O configuration enables any analogue
and digital interface input to be routed to one or more of
the available analogue and digital output interfaces. The
AX32 and DX32 are thus a combined analogue and
digital I/O interface in combination with a powerful
internal router which can manage 1,500 inputs and 1,500
outputs simultaneously. Furthermore, the optional Dante
AoIP interface allows the AX32 and DX32 to interface
with other Dante-enabled devices from more than 200
manufacturers.
Signal processing
In addition to the signal routing functionality an optional
32 bit floating point processor engine is available
providing a 32 bus summing system with 256 possible
inputs and gain adjustment on all input and output
channels.
Included as standard in both units is PPM measurements
on all input and output channels.
Interfaces
The AX32 and DX32 provide a large number of I/O
channels, where some are included as standard and
others are options.
The following interfaces are always available on the unit:
• 1 MADI interfaces with 64 I/O channels
• 8 line AES3 interface with 16 I/O channels
• a 2-port 64 channel I/O interface for Pro Tools HD / HDX.
Rear panel AX32
Rear panel DX32
0 - 64
0 - 64
64
64
64 - 1,216
64 - 1,216
16 - 144
16 - 144
0 - 256
0 - 48
Output
signals
0 - 256
1,500 x 1,500 matrix
0 - 48
Mono channels
Dante/AES67
Pro Tools
MADI
AES3
3G SDI
Analogue
Output Bus
256
32
Sum
32 bus summing
AX32 Router and Processor engine
As internal options for the units a 64 channel Dante AoIP
interface as well as a dual MADI interface with 128
channels is available. Sync interfaces via word clock,
AES11, Video, and all digital signal inputs. Sample rate
can be set to internal or external. The sample rate can be
set via all external devices.
I/O Cards
The AX32 has 8 slots for user configurable I/O cards. 3
different analogue and 3 different digital I/O cards are
available. The slots can be configured with either 6
analogue card or 8 digital cards or a combination
thereof.
The following I/O cards are available:
•
•
•
•
•
•
8 ch. Line pristine A/D card
8 ch. Mic/Line pristine A/D card
8 ch. pristine D/A card
Dual SDI/HD/3G 2x16 ch. emb/deembed. card w. SRC
8 Line AES3 16 ch. I/O Card w. SRC
Dual MADI 128 ch. I/O Card
Technology
Specifications
Sample rates up to 384 kHz and DSD
DAD were the first to design converters that handle sample
rates up to 384 kHz. The AX32 follows the track of the
renowned AX24 with an enhanced performance on the
standard sample rates and the high sample rates like 192 kHz,
DXD, 384 kHz and the one bit DSD format.
Frequency Response A/D-D/A Conversion
+15
+10
+5
-5
The outstanding sound quality of the AX32 is achieved by an
extreme attention to detail in every part of the circuit design.
One of these details is the use of two parallel A/D converters
per channel to increase the dynamic range.
-35
The AX32 mic pre’s have an outstanding performance with an
equivalent input noise below -130 dB. A resistor-based gain
step circuitry with relays ensures that no un-linear distortion is
added to the sensitive microphone signal when amplified.
Each 0.1 dB gain step is digitally compensated for an inter
channel accuracy of 0.1 dB.
128 times oversampled D/A with DXD and true DSD
The D/A converter provides an ultimate natural conversion and
relies on a high resolution design with 128 times oversampled
output of the PCM sample rates, using DAD optimized
reconstruction filters, as well as a true-DSD output provided by
the same modulator and filter system. The analogue output
level is adjusted by a level step circuitry using relays in
combination with a digital gain circuitry and a mute system
ensuring high dynamic range, and still no disturbing clicks
when changing formats or powering down.
Low latency routing and signal processing
The AX32 and DX32 units are internally distributing all the I/O
signals via a 1,500x1,500 I/O matrix, which also provides a
channel based processing and a 32 bit floating point summing
processor. The matrix provides fixed-latency asynchronous
routing of all inputs to one or more outputs with a time stamp
mechanism. This ensures a fixed latency of 5 audio samples
from all digital inputs to all digital outputs. All the sample rates
from 44.1 kHz to 384 kHz and DSD are supported. Due to the
nature of the DSD format, no signal processing is however
possible when operating in DSD mode.
DSD128
DSD64
d
B -15
u -20
Dual 5 bit @ 6.14Mhz A/D conversion
Accurate Mic-pres with relay gain system
96kHz
88.2kHz
-10
-25
Another very important detail is the use of the DAD ultimate
high resolution conversion technology using the higher order
6.14Mhz 5 bit delta sigma modulator of the ADC chip. Rather
than using the decimation filters built into the ADC chip, we
feed the output from the modulator to a DSP featuring DAD
designed and optimised decimation filters, allowing us to
provide all sample rates in the highest possible quality.
48kHz
+0
44.1kHz
384kHz
DXD
-30
176.4kHz 192kHz
-40
-45
-50
10k
20k
30k
40k 50k 60k 70k 80k 100k
200k
Hz
THD+Noise A/D and D/A conversion
-90
-92.5
-95
A/D -97.5
d -100
B -102.5
F
S -105
-107.5
D/A -110
d -112.5
B -115
r
-117.5
A -120
-122.5
-125
-127.5
-130
-120
D/A Conversion
A/D Conversion
-100
-80
A/D dBr
-60
-40
D/A dBFS
-20
+0
Dynamic Range
+0
-10
-20
-30
-40
-50
A/D -60
d -70
B -80
F
S -90
-100
-110
-120
-130
-140
-150
•
•
•
•
•
•
•
•
•
A/D Conversion
2.5k
5k
7.5k
10k
12.5k
Hz
15k
17.5k
20k
22.5k
Dynamic range, ADC (A) > 123 dB
THD + N, ADC (A) < -120 dB @ -6 dBFS
Dynamic Range, DAC (A) > 128 dB
THD + N, DAC (A) < -115 dB @ -6 dBFS
Cross talk (A) < -120 dB
Mic Equivalent noise (A) < -130 dB @ 100Ω
Mic gain range - 18 to +70 dB
Mic gain step accuracy < 0.25 dB
Sample-rates 44.1 to 384kHz, DSD64,
DSD128 (DoP)
• Clock accuracy < 2PPM via Digital PPL
Control
DADman control software
The AX32 and DX32 are controlled via a network connection using
the DADman control software which is available for Microsoft
Windows™ and Apple™ OS X. DADman provides a GUI oriented user
interface for configuration and operation of the DAD interfaces.
DADman can control multiple AX32s and DX32s simultaneously,
and the units can also be controlled from multiple computers
simultaneously.
Eucon control protocol
The Avid™ Eucon™ control protocol is supported by DADman
allowing the AX32 and DX32 to be controlled by a range of Avid
Eucon-enabled control surfaces such as the S6 and Artist series.
Currently the implementation provides control of the AX32 mic
pre’s and the Pro | Mon monitor control option.
3rd party hardware controllers
Control of AX32 and DX32 is supported by various hardware
controllers. Apart from Avid Eucon-enabled control surfaces, other
stand-alone controllers from 3rd party manufacturers are also
available for direct control of the AX32 and DX32 functions.
Monitor control via Avid Eucon-enabled control surfaces
The AX32 and DX32 provide a unique solution for easy and flexible monitor control and signal insert management
using a variety of analogue and digital audio interfaces. Monitor control is made via the Eucon-enabled DADman
software and can be configured for a variety of user defined I/O set-ups. The AX32 or DX32 processes the matrix
settings, signal levels, summing and down-mix.
Using Eucon monitor enabled control surfaces, control room monitors and individual monitoring, cues, stems and
signal inserts can be managed quickly and precisely.
EUCON
Avid S6
Benefits
Music Studio
LIVE ROOM
The AX32 is the core AD/DA converter and signal
concentrator for the recording micro-phones, one or
more DAW’s, a digital mixing desk, the outboard
processors, the cue and talk-back signals and the
studio speakers. The set-up provides ultimate
flexibility and sound quality in the recording studio.
VOCAL BOX
Microphones
Headphones
Microphone
HP Amp
Headphone
Dante
Dante
HP Amp
CONTROL ROOM
Analogue
Ethernet
AES3
MADI
DigiLink
Back-up Recorder
Main Speakers
Gbit
Switch
Outboard Equipment
Console / Control Surface
Pro Tools HD / HDX
DAD AX32
Dante
2nd Workstation
Location Recording
FRONT OF HOUSE
The AX32 in combination with DX32 makes a perfect
light-weight and compact solution for solution
multi-channel location recording. The AX32 with
remote-controlled mic pre’s is installed close to the
performers and feeds the DX32 and even a FOH desk
using Dante through a single network cable.
STAGE
Up to 48 mic inputs
Console
Dante
DAD AX32
CONTROL ROOM
Thunderbolt
Gbit
Switch
Headphone
Dante
DAD DX32
HP Amp
Pro Tools HD
Native
Laptop with DVS
for back-up
Dante
Dolby Atmos set-up – Post production
EDIT SUITE
The AX32 operates as a MADI router for distribution of the
production audio bed/stems and the object oriented
audio channels. Depending on the phase in the workflow,
audio can be routed to the sound processors and or to the
speakers in the studio or to the mixing stage.
MIX THEATRE
Pro Tools HD/HDX
MADI I/O
Cinema Speaker Output
CONTROL ROOM
Pro Tools HD/HDX
64 object ch.
Dolby RMU
Re-rendered 64 ch.
Speaker channels
DAD AX32
64 object ch.
Dante
7.1 Processor
Monitor Controller/
Control Surface
Speaker Processor
Gbit
Switch
DAD DX32
Dante
Eucon
Interface for MADI DAW
Working with two Pro Tools systems
Analogue I/O
MADI I/O
DAD AX32
DAD AX32
Samplitude
Monitor control for digital I/O
Pro Tools HDX
Pro Tools HDX
Pro Tools HDX
DX32 for live applications
Studio Monitors
MADI I/O
AES3 I/O
Monitor Console
Dante
Network
MADI I/O
Redundant
FOH Live Console
AES3 I/O
DAD DX32
Monitor
Controller
DAD DX32
Pro Tools HDX
A masterful combination
AX32 | Analogue Mic/Line AD/DA/DD matrix
NTP Technology AS
Nybrovej 99 2820 Gentofte Denmark
T: +45 4453 1188 F: +45 4453 1170 E :ntp@ntp.dk
www.ntp.dk
All trademarks are recognized as the property of their respective owners.
DOC 980010C
DX32 | Digital interface and matrix
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