User's Manual

User’s Guide ADI-2 DAC v2.2 © RME

24. General

The ADI-2 DAC is a UAC 2.0 Class Compliant device. Mac OS X has full UAC support built-in,

there is no driver installation required. Connect computer and ADI-2 DAC with a USB cable.

Mac OS X detects the new hardware as ADI-2 DAC (serial number).

For firmware updates please see chapter 7.

24.1 Configuring the ADI-2 DAC

Configuration of the ADI-2 DAC is mostly done directly at the unit. When set to Clock Source

Internal, Mac OS X will set the current sample rate.

Via Launchpad – Other –

Audio MIDI Setup the ADI-2

DAC can be configured for the

system wide usage. The

Audio window includes a

menu to select the sample

rate. In Stereo mode up to 768

kHz are supported, in Multi-

channel mode up to 192 kHz.

The two modes can not be

selected here, but have to be

chosen at the unit while it is

disconnected from the

computer.

Use Configure Speakers to

freely configure the stereo or

multi-channel playback to any

available channels.

Applications that don't support card or channel selection will use the device chosen as Input

and Output in the System Preferences – Sound panel. This setting is also available in the

Audio MIDI Setup via the gear symbol at the bottom of the window.

24.2 Clock Modes - Synchronization

In the digital world, all devices must be either Master (clock source) or Slave (clock receiver).

Whenever several devices are linked within a system, there must always be a single master

clock.

A digital system can only have one master! If the ADI-2 DAC’s clock mode is set to 'In-

ternal', all other devices must be set to ‘Slave’.

To cope with some situations which may arise in studio practice, defining a sync reference is

essential. RME’s exclusive SyncCheck technology enables an easy to use check and display

of the current clock status. In the State Overview screen the column SYNC will show for all

digital inputs whether there is a valid signal (Lock, No Lock) for the optical input, or if there is a

valid and synchronous signal (Sync). See chapter 15.3.