RME ADI-4 DD [12/26] Double wire conversion

User's Guide ADI-4 DD © RME

Notes on special functions

Using the AES STATE key the second ADAT output can be configured to act as optical SPDIF

output. When choosing AES STATE OPT., the red LED is lit constantly, and the channels 1/2

will also be transmitted via OUT 2.

7.5 Double Wire Conversion

The ADI-4 DD is able to convert AES Double Wire into Single wire and vice versa. For this ap-

plication the ADAT I/Os have to be bridged (connect IN 1 with OUT 1, IN 2 with OUT 2). ADAT

must not be chosen as clock source (SYNC).

The conversion is steered manually by the key DS MODE.

• If an AES signal in Double Wire format is present (carrier 32 to 48 kHz) and DS MODE AES

is activated, the data split into up to 8 channels is being converted into the original up to 4

channels Single Wire (64 to 96 kHz, output in Double Speed). Basically the connection OUT

2 to IN 2 is not needed. But as OUT 2 carries a copy of the data of OUT 1, the channels 5-8

(the AES output 3/4) will also send out this copy. This can be used to send the converted

signal to two different destinations (splitter 1 to 2).

• If a single wire Double Speed AES signal (64 to 96 kHz) is present, and DS MODE AES is

deactivated, the first 4 channels will be converted to 8 channels Double Wire (32 to 48 kHz).

Both conversions are loss-less, the available samples will only be put together or distributed

between the channels.