Converting Digital To Analog; Parallel A/D And D/A Conversion - Behringer Ultramatch PRO SRC2496 User Manual

Fig. 3.1: Example: A/D conversion of a microphone signal
Fig. 3.1 shows a typical setup for recording a signal source on a
digital recording device (here: hard-disk recording system). If your
HD recording system is equipped with a digital interface, you can
use the ULTRAMATCH PRO to “circumvent” the A/D converter
on the sound card and thus avoid interference signals generated
by the computer. By taking the signals from the subgroup outputs
on your mixing console, you can record several signal sources at
the same time by assigning (routing) them to the corresponding
subgroups.
In practice, the ingenious design of the SRC2496 proves to be
versatile to the point that you can also solve problems which are
not directly related to a normal studio environment. For example,
digital hi-fi recording devices such as MD recorders (Mini Disc)
have met with widespread popularity in home systems.
Unfortunately, however, such devices cannot record with 32 kHz
using their digital input.
Thus, it is impossible to record digital broadcasting programs
directly to digital; D/A and A/D conversion steps are inevitable.
Not so with the ULTRAMATCH PRO, as it can convert the
broadcast signal from 32 kHz to any other common sampling rate
and also remove any form of copy protect information.
A second wiring setup shows how to copy tape recordings for
restoring and subsequent archiving purposes on digital media.
ULTRAMATCH PRO SRC2496
Fig. 3.2: Example: A/D conversion of tape recordings
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3.1.2 Converting digital to analog

Using the ULTRAMATCH PRO as a digital-to-analog converter
is interesting in all applications, where signals must be made audible
again after digital processing, e.g. to “circumvent” D/A converters
of inferior quality in devices with a digital output (sound card).
This can be useful if your sound card is not shielded from
electromagnetic interference generated by power supplies or
graphics cards for example. You can feed the audio signal from
the digital interface of the sound card to one of the digital inputs
on the SRC2496 and then take it from the analog outputs. The
type of cable required for connecting the sound card to the
ULTRAMATCH PRO depends on the output connector used.
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3.1.3 Parallel A/D and D/A conversion

The SRC2496 offers you the possibility to simultaneously convert
analog signals into digital, and vice versa. In
, you can only convert from digital to analog if the CLOCK
switch in the output section has been set to DIG IN. In this case, the
sampling rate will be determined by the digital signal applied.
Otherwise, the ULTRAMATCH PRO can only be operated as an
A/D converter, and the D/A converter function will be muted. In
the D/A converter is always active.
3. APPLICATIONS 9