Introduction; Supplied Contents; Brief Description And Characteristics - RME Audio ADI-4 DD User Manual

1. Introduction

With the ADI-8 DD you have an incredibly compact and flexible digital interface to your supply.
What at first looks like a simple AES/ADAT format converter, turns out to be a universal problem
solver at a closer look. From small project studios to broadcast and television, the ADI-4 DD is
the perfect link between the formats mostly used today.
As a consequent continuation of RME's world-wide successful ADI-8 series, the 4-DD also con-
tains elaborate technology and the latest integrated circuits, delivering 8 full channels in 24 bit
and 96 kHz. The ADI-4 DD is a uniquely powerful and high-quality device, which will excite you
even after many years of operation.
2. Package Contents
Please check that your ADI-4 DD package contains each of the following:
• ADI-4 DD
• Quick Info
• Power supply 12 V / 1.25 A and power cord

3. Brief Description and Characteristics

The ADI-4 DD consists of two 8-channel digital format converters in reference quality, in a half-
rack space enclosure with 1 unit height. The compact device has numerous extraordinary fea-
® ®
tures like Intelligent Clock Control (ICC), SyncCheck , SyncAlign , Bitclock PLL, SteadyClock,
active jitter suppression and patchbay functionality.
All of the ADI-4 DD's I/Os support 96 kHz/24 bit. As ADAT optical is 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 RME's Hammerfall and Hammerfall
DSP. Thus the ADI-4 DD also serves as an ideal AES/EBU frontend for these interface cards,
on both Mac and PC.
The format conversion between AES/EBU and ADAT operates in both directions at the same
time. LEDs of different colours show the present state of incoming and outgoing signals and of
the internal processing in a clear way.
The unique Intelligent Clock Control (ICC) allows for a flexible use with external word clock or
the digital input signals. These options being available for both directions are intelligently cou-
pled in a way typical for RME and easy to apply thanks to a clear and easily understandable
display of the Lock and Sync states. Besides, the unique Copy Mode allows for operation as
digital patchbay and signal distributor.
User's Guide ADI-4 DD © RME
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