User's Manual

User’s Guide ADI-2 DAC v2.2 © RME

14.1.2 Clock

The subpage Clock has the following entries:

Clock Source

Shows the current clock source INT (internal), optical or

SPDIF coaxial. The clock source is automatically

determined and set by the unit, a selection is neither

possible nor necessary. With USB the internal clock is

used, with SPDIF the external one.

Sample Rate

The sample rate is also automatically determined and set by

the unit. With USB the current sample rate of

record/playback is set (INT), with SPDIF the sample rate of

the SPDIF signal (Optical/SPDIF c).

ADAT input signal: The automatic clock control requires the ADAT data stream to include

SMUX2 indication, in case of 88.2 and 96 kHz sample rate. As there is no indication for 176.4

and 192 kHz (SMUX4), these sample rates are not supported with ADAT.

The unit's internal clock supports 44.1, 48, 88.2, 96, 176.4, 192, 352.8, 384, 705.6 and 768 kHz.

Sample rates 44.1 to 192 kHz are also supported for the SPDIF input. In the lowest line the

DSD rate equalling the current sample rate is shown.

14.1.3 Phones / DSD

The subpage Phones / DSD has the following entries:

Mute Line

OFF, vs. Phones, Toggle Ph/Line. Toggle Plugged. The default, vs. Phones, activates mute of

Line Outs when inserting a phones or IEM plug. Alternatively Toggle activates the ability to

manually switch between 'front' and 'rear'. It allows to have the Phones/IEM connected all the

time. To change push the VOLUME knob for half a second. Via Remap Function Keys this func-

tion can also be controlled by one of the four function keys or the remote control. Toggle

Plugged additionally activates the switching between Phones and IEM, automatically detected

by the sensor contacts of the two outputs. Which also works via Remote and Function Keys, if

Toggle Ph/Line has been activated there.

DSD Direct (Line)

OFF, ON. Default: OFF. When activated a DSD playback

will use DSD Direct mode over the rear outputs 1/2. As DSD

Direct bypasses all DSP calculations and volume control,

the only way to change the output volume is by setting

different reference levels. Therefore in DSD Direct mode

outputs Phones and IEM are disabled.

DSD Filter

When DSD Direct mode is active, high-frequency noise filters help to reduce such noise, which

is quite high in level and might have negative impact on other equipment. While 50 kHz is

optimized for DSD64 and 150 kHz for DSD 128 and 256, the user can freely try both at any

DSD rate.

DSD Detection

Default: ON. Option to deactivate the automatic DSD detection on SPDIF and USB.