User Manual

User’s Guide ADI-2 Pro – v 1.91

14.1.2 Clock

The subpage Clock has the following entries:

Clock Source

Choices are Auto, INT (Internal, Master), AES, SPDIF.

Sample Rate

Choices are 44.1, 48, 88.2, 96, 176.4, 192, 352.8, 384,

705.6 and 768 kHz. When clocked externally the ADI-2 Pro

will recognize and handle other frequencies as well, for

example 32, 64 and 128 kHz.

When using 352.8 or 384 kHz sample rate the level meter display will show a single channel of

audio sent out from SPDIF, or received in case a signal of 192 kHz sample rate is attached. The

reason is that the ADI-2 Pro includes a special SMUX mode. When run at Octa Speed, the ADI-

2 Pro will split the data of the left analog input channel to the AES/SPDIF output channels left

and right, at half the sample rate – 192 kHz. Using measurement software like HpW Works

(www.hpw-works.com) which supports this mode (2x speed), and any 192 kHz capable RME

audio interface, one can perform analog measurements with 384 kHz sampling rate bandwidth

over SPDIF – of at least one analog channel.

The big advantage compared to a direct USB connection: using SPDIF optical the tested device

is galvanically isolated from the measuring system (interface/computer), a crucial requirement

when probing in the extreme areas that the ADI-2 Pro allows for.

14.1.3 Device Mode

The subpage Device Mode has the following entries:

Basic Mode

Choices are Auto, AD/DA, USB, Preamp, Dig Thru and DAC. See chapter 17.

Dual Phones

OFF, ON. Default: OFF. With Dual Phones ON the phones

output PH 1/2 will be active. Default state is Off, as PH 3/4

is the main phones output and should be used exclusively

unless two phones are to be connected.

If Dual Phones is on and two phones are plugged in, a push

on VOLUME toggles between 1/2, 3/4 and linked volume

control (with the marker over both). When VOLUME is

turned the Dual Volume screen is shown then.

CC-Mode

Choices are Stereo and Multi-channel. The ADI-2 Pro supports two Class Compliant modes: 2

channel I/O, which allows to use sample rates up to 768 kHz even with iOS devices, and 6/8

channel mode to give access to all I/Os simultaneously. In multi-channel mode the sample rate

is limited to 192 kHz. To be able to change the mode USB must be disconnected.

Bal Phones Mode

OFF, ON, Auto. Default: OFF. In Balanced Phones mode output PH 3/4 carries the left channel,

output PH 1/2 the right channel. See chapter 18 for details. When Auto is selected, the bal-

anced phones mode is automatically activated as soon as both Phones outputs detect a con-

nector being plugged in. This feature temporarily deactivates DSD Direct mode if active.

Note

: When active, the rear analog outputs are muted automatically.