Manual

Model 44D User Guide Issue 3, August 2018
Studio Technologies, Inc. Page 5
Introduction
The Model 44D Audio Interface provides a
simple yet high-performance means of in-
terfacing two channels of analog line-level
audio to and from applications that utilize
Dante® audio-over-Ethernet media net-
working technology. Two Model 44D units
can also provide one-to-one signal paths,
two in each direction, over a standard
local area network (LAN). In addition, the
unit supports transport of status signals or
contact closures between Model 44D units
and other compatible products. There are
two general-purpose inputs (GPI) and two
general-purpose output (GPO) on each
Model 44D.
A special operating mode allows the
Model 44D to serve as a tone generator
rather than an audio interface. When
configured for the tone generator mode
18 kHz and 20 kHz sine-wave audio sig-
nals are available in both the analog and
digital domains.
The Model 44D is a fully professional
product that offers the audio quality, fea-
tures, and reliability required by 24-hour,
on-air, and commercial applications. The
two line-level audio inputs use standard
3-pin female XLR connectors for easy
interfacing with balanced and unbalanced
sources. The input audio signals are
converted to 24-bit digital and then trans-
ported via the Dante interface. Two digital
audio signals arrive into the Model 44D via
the Dante interface and are then converted
to analog. Two 3-pin male XLR connectors
on the Model 44D’s back panel provide
balanced line-level outputs.
The Model 44D is designed as a bridge,
using Dante to link analog or other Dante
interfaces found on devices such as matrix
intercom systems, broadcast routers, and
audio consoles. An Ethernet connection
is all that’s required to make the Model
44D part of a sophisticated, networked
audio system. Dante audio-over-Ethernet
has found wide acceptance as an audio
“backbone” due to its ease of use, high
Figure 1. Model 44D standard “throw-down” front view
Figure 2. Model 44D back view