16-Channel 24 Bit/96 kHz Dual Universal
Please note that the ADI-8 DD is discontinued!
The ADI-8 DD commands any other format
or sample rate converter in the price-range up to $5,000 to their places,
with a single strike on the timps. Such a statement demands its proof - here
The ADI-8 DD consists of two (!) digital format converters with each up to
16 channels. It offers 34 different conversion modes, all with 24 bit resolution.
Besides the bi-directional conversion between all formats (ADAT/TDIF, ADAT/AES
or TDIF/AES), numerous additional modes are available. A simplified list
looks like this:
- 8-channel AES (4 x stereo,
XLR) to ADAT optical || TDIF converter (96 kHz)
- 8-channel AES to 2 x ADAT
|| 2 x TDIF splitter (48 kHz)
- 2-channel AES to 8 channel
TDIF || ADAT splitter (96 kHz)
- 8-channel ADAT / TDIF to
2 x ADAT || 2 x TDIF splitter (48 kHz)
- 16-channel ADAT / TDIF to
ADAT || TDIF converter (48 kHz)
- 8-channel ADAT / TDIF to
ADAT || TDIF converter (96 kHz)
- 8-channel TDIF / ADAT to ADAT || AES (4 x stereo,
XLR) converter (96 kHz)
- 16-channel TDIF / ADAT to ADAT (|| AES) converter
- 8-channel AES to AES Sample Rate Converter (96 kHz)
- 2-channel AES to 8-channel AES splitter (96 kHz)
- 4-channel AES Double Wire to AES Single Wire converter
- 4-channel AES Single Wire to AES Double Wire converter
- 8-channel ADAT / TDIF to ADAT || TDIF Sample Rate
Converter (96 kHz)
* ADAT || TDIF means that the
output signal is present in parallel, i.e. at the same time on the ADAT and
TDIF outputs. ADAT / TDIF means that the input can be either ADAT or TDIF.
Complicated? Not at all. The ADI-8 DD
is both easy to understand and easy to operate. More on the plain and simple
basic structure of the DD can be found here.
Because the ADI-8 DD is a dual converter,
there are two modes available at the same time from the modes mentioned above
- with few exceptions. Professionals are really thrilled by these features:
the ADI-8 DD understands Sample Split, S/MUX, Double Wire and Double Line.
It is thus compatible to all known methods for raising the sample rate by
sample distribution, on all supported platforms. Also multiple units can
be stacked and operated sample-aligned, using word clock.
Both converters work both completely independent and intelligently coupled.
The actual states of incoming and outgoing signals and ongoing operations
within the unit are displayed with LEDs of different colors in an easily
overseeable way. The 8-channel Sample Rate Converter
in Hi-End 24 bit/96 kHz quality is only available in the left or
right part of the device. It allows for a wide range of applications. When
the internal clock is used, the SRC works as a perfect jitter-killer.
And thanks to the SRC's clock-decoupling non-synchronizable items
like CD-players and DAT recorders can be used together as if they were synchronizable.
Devices from RME have an outstanding reputation. To maintain this, we keep
on looking for details that others miss. A present example is the ADI-8 DD's
SyncAlign® technology. As soon
as more than one AES or SPDIF input are used, there is usually the chance
of an accidental error of ± 1 sample misalignment between the stereo
inputs. SyncAlign prevents this error and guarantees sample synchronicity
between all 4 x 2 channels.
All of the ADI-8 DD's I/Os support 96kHz/24bit. As ADAT®
optical and TDIF are usually restricted to 48kHz, in DS mode (Double Speed)
two channels are being used for the transmission of one channel's data. The
Sample Split algorithm used is also implemented in the Hammerfall
Light. Thus the ADI-8 DD also represents an ideal AES/EBU frontend
for the Hammerfall series.
The compact device with 19" width and 1 HU has numerous exceptional
features like Intelligent
Clock Control (ICC) and storing of all settings.
Other highlights are:
- ADAT® optical
inputs, 24 bit, using RME's unsurpassed bitclock PLL for sample accurate
- TDIF-1 interface, 24 bit,
SD-PLL, Emphasis support, DA-88 compatible
- Sample rate conversion 96
kHz/24 bit switchable for the AES/EBU inputs
- Copy Mode allows for copying
data to an output of the same format (ADAT to ADAT etc.)
- Clock decoupling (re-synchronization)
- Active jitter reduction per
Serial Double PLL and SRC
- Digital Patchbay, allows
for copying, duplicating and distributing of the digital input signals
- SyncCheck®, unequalled technology
for checking of clock synchronicity
- SPDIF mode switchable for
the second ADAT optical output
Compare the ADI-8 DD with other
stereo or multichannel converters and you will agree: the ADI-8 DD shows
an unsurpassed flexibility together with a sensational price point! It is
the long-awaited link in the semi-professional and professional area, from
project studio to broadcast applications.
Join us for a small 'tour de ADI', starting on the left side at the AES
to ADAT/TDIF converter. Configuration starts with choosing the input
signal (AES, ADAT or TDIF.) The state of the digital input signals is displayed
by 16 LEDs. Shown are Lock (per XLR socket, including SyncCheck), Emphasis
and the level of the audio signal.
SRC activates a Hi-End 8-channel Sample Rate
Converter. It is especially useful when sources cannot be synced or the output
signal shall have another sampling frequency. RME's intelligent clock control
(ICC) offers extensive and professional means that are not easily met. To
start with, the clock source can be set to Internal (crystal), External (BNC
word clock) and Input, while Input lets you select between AES, ADAT or TDIF.
The INT(ernal) clock rates are 44.1 and 48kHz, which turn to 88.2 and 96kHz
after activating the DS mode. After activating SRC, any AES signal from 32
to 96kHz can be converted to 44.1, 48, 88.2 or 96kHz. Lock state and clock
synchronicity are being displayed by the state of each LED (flashing or constantly
The ADAT/TDIF to AES section is laid
out in a similar way. After choosing the input signal (AES, ADAT or TDIF),
the clock source and the sampling rate, there is a field with 16 LEDs for
displaying the current status. An Emphasis bit at the TDIF input will be
automatically set and indicated for the AES out. The Lock state of the input
signals is being displayed at the SOURCE selector by flashing LEDs. The SYNC
LEDs show the synchronicity between both ADAT or TDIF inputs (or the four
XLR inputs), as in Double Speed mode (DS) 2 I/Os are active (4 channels each.)
The AES output signal can be set to Consumer or Professional subcode. The
first output (channel 1/2) can optionally be output optically (via TOSLINK)
using the second ADAT output, or both ADAT outputs can operate in parallel
to the AES outputs.
The unit always sends its output signal to ADAT and TDIF simultaneously.
Additionally when operating at no higher than 48 kHz both ADAT outputs and
TDIF interfaces get the same signal. Thus the distribution capability is
doubled to 2 x ADAT and 2 x TDIF. Thanks to the freely available inputs all
attached devices can send signals to each other without the need to rearrange
the cabling between them.
The rear of the ADI-8 DD looks clear and tidy.
Two ADAT and TDIF I/Os each (for 8 channels @ 96kHz), word clock I/O and
four AES I/Os offer unbeatable flexibility and compatibility. Whatever it may
be - just make the connections and take off!
|Input AES/EBU: 4 x XLR, electrically
isolated, highly sensitive input stage (< 0.3 Vpp), SPDIF compatible
|Output AES/EBU: 4 x XLR, transformer
balanced, 5 Vpp
optical: 2 x TOSLINK, 24 bit, Bitclock PLL
optical: 2 x TOSLINK, 24 bit
|Input/Output TDIF: 2 x D-type 25
pin, 24 bit, SD-PLL
|Input word clock: BNC, Signal Adaptation
Circuit (functional from 1.2 Vpp input signal), SD-PLL
|Output word clock: BNC, low-impedance
driver stage, 4 Vpp into 75 Ohms, short-circuit-proof
|Sync sources: ADAT optical input,
AES/EBU input, TDIF input, word clock input
|Varipitch: by input signal or word
|Sample rates: 44.1 kHz, 48 kHz,
88.2 kHz, 96 kHz, variable (Sync/word clock)
|Sample rate range: AES, word clock:
27 kHz-105 kHz, ADAT/TDIF 33 kHz - 57 kHz
|Jitter: Internal clock < 1 ns,
word clock In < 3 ns, ADAT In < 2 ns, TDIF In < 3 ns
|Jitter sensitivity: all PLLs operate
even at 40 ns Jitter without problems
|Jitter reduction: SD-PLL > 50%,
SRC > 99%
|SRC dynamic ratio: 128 dB
|SRC THD+N: < -117 dB (< 0.00014
|Sample rate ratio: Max. 3:1 / 1:3
|Power supply: internal switching
mode ps, 100 V-240 V AC, 50-60 Hz, 10 Watts
|Dimensions: 483 x 44 x 200 mm
|Warranty: 2 years
For further information about the functions
of the ADI-8 DD simply download the manual.
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