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5.5 Playback
In the audio application being used, the ADI-2/4 Pro SE must be selected as output device. It can
often be found in the Options, Preferences or Settings menus, as Playback Device, Audio De-
vices, Audio etc. After selecting a device, audio data is sent to an analog or digital port, depending
on which has been selected as playback device.
Increasing the number and/or size of audio buffers may prevent the audio signal from breaking
up, but also increases latency i.e. output is delayed.
5.6 Analog Recording
For recordings via the analog inputs the corresponding record device has to be chosen.
Channels 1/2 of the ADI-2/4 Pro SE have digitally controlled gain and five hardware-based refer-
ence levels. The digitally controlled gain offers a gain setting in steps of 0.5 dB within a range of
0 dB to +6 dB, for fine-tuning the input sensitivity. The five hardware-based Reference Levels
allow a coarse adaption to the current source signal. The ADI-2/4 Pro SE has global as well as
channel level meters. Setting the correct Ref Level to avoid clipping/overload is easy to do.
The combo XLR/TRS sockets are designed for line and phono (Moving Magnet, MM) signals.
Sources that require higher input impedances, like guitars, need an additional impedance buffer
in front of the ADI-2/4 Pro SE.
5.7 Digital Recording
The easiest way to perform digital recordings with the ADI-2/4 Pro SE is to set the SRC to the
currently used input (SPDIF or AES), then set the Clock to INT(ernal) and the desired sample rate
– then start recording.
The SRC serves as clock decoupler. When not using the SRC, the ADI-2/4 Pro SE must be in
total Sync to the external digital device, as either master or slave. Taking this into account, RME
added a comprehensive I/O signal status display to the ADI-2/4 Pro SE, showing sample fre-
quency, lock and sync status in the State Overview screen and the bottom status bar.
The sample frequency shown in the State Overview screen is useful as a quick display of the
current configuration of the unit and the connected external equipment. If no sample frequency is
recognized, it will show - - (No Lock).
This way, configuring any suitable audio application for digital recording is simple. After connect-
ing it the ADI-2/4 Pro SE displays the internal and external sample rate. This parameter can then
be changed in the application's audio attributes (or similar) dialog.
User's Guide ADI-2/4 Pro SE - v 1.0
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