Brochure

Guest interviews don’t have to be complicated.
Expert guests (like entertainers, political pundits, athletes, and others)
don’t always have access to engineers. They need something as simple to
use and familiar as a phone call. But that doesn’t mean a radio program
should settle for phone quality audio.
Opal is an IP audio gateway that enables guests to connect to the studio
by simply clicking a link. It provides HD quality audio from consumer-
grade equipment, like a cellphone or a computer with a microphone.
It’s easy enough to use without a technical background, and most
importantly, it sounds great.
Simplicity
Opal enables guests to connect
to the studio by simply clicking a
link. Unlike Skype and other apps,
the remote guest doesn’t install a
thing – they just click a button,
and go live. This simplicity means
that guests with no technical
background can connect and
transmit HD audio.
Compatibility
Opal works by activating the Opus
encoder built into commonly used
browsers, including Chrome,
Firefox, Safari, Edge, and Opera.
As a result, Opal can connect to
any computer or Android or iOS
device with one of those browsers
installed. All a remote guest needs
to transmit audio is a browser and
a microphone.
Opus Encoder
Opus is a ubiquitous encoder that
is built into modern web browsers.
Opus transmits high-fidelity, low
delay audio in both directions. It
uses very little network bandwidth,
so it’s highly reliable.
Audio Connections
• Balanced Ch 1/2 XLR line-level audio input
• Balanced Ch 1/2 XLR line-level audio output
• AES3 XLR Digital audio input
(through Ch 1 XLR input when switched)
• AES3 XLR Digital audio output
(through Ch 1 XLR output when switched)
Other Connections
• Ethernet port (1000Base-T)
• Contact closures (9-pin mini DIN)
• Serial port (8-pin mini DIN) (for future use)
• Power (4 pin connector)
Audio Levels
• Balanced audio input level: 0dBu
• Balanced audio output level: 0dBu
• Full scale is 20 dB above nominal
Power and Physical
• External supply (24VDC 20 Watts)
• Size (8.5” W x 6.25” D x 1.75”H
21.59 cm W x 15.88 cm D x 4.45 cm H)
• Weight (2.16 lbs; 0.98 kg)
L & R tri color LEDs display
channel status/audio level
Opal Connections & Specifications
www.comrex.com • e-mail: [e-mail] • 19 Pine Road, Devens, Massachusetts 01434 USA • Tel: [phone] • Fax: [phone]
IP Audio Gateway