Roland Professional A/V S1608, S4000D, S4000S-0832, S-4000S-0040 User Manual
Multi-Channel Digital Audio Transfer Systems
Multi-Channel Digital Audio Transfer Systems
The superior quality and reliability of RSS Digital Snakes is made possible by coupling high quality preamps with
Roland’s REAC digital transmission technology. RSS Digital Snake systems are immune to the hums, buzzes
and general impedance and capacitive losses that plague analog snakes. By having the mic preamps close to
their source and by avoiding the transmission losses of long runs of analog cables, your audio has a chance
to sound its best throughout your whole system. The system provides superior clear sound, great intelligibility
with minimum latency and the freedom to easily split or extend your source audio. Digital Snakes are the next
generation of audio quality for concerts, corporate events, houses of worship and any kind of audio installation.
Superior Sound Quality
ANALOG
(Digital)
ANALOG
(DIGITAL)
Boost after transfer means
degradation and cross talk can be
created during analog transfer
Gain boost before transfer means
the best possible source audio is
then transferred in the snake
High Quality Pre-amps on each input channel
In an analog system, low-level microphone signals are boosted using a mic
preamp only after the long, arduous journey down the analog snake. For this
reason it’s difficult to avoid degradation and cross talk. The digital snake is
equipped with high quality and remote controllable pre-amps that boost the
input gain very close to the source, where the highest quality signal is found.
This ensures that your audio will sound its best. And of course once the signal
is in digital form, it is immune to analog cabling losses. The pre-amp has
been specially designed for live audio applications and is made of high quality
components carefully selected by Roland’s engineers.
High quality and low noise digital transfer
In the analog domain, it is impossible to avoid signal degradation during long
distance audio transfer at concerts or events in large halls or arenas. Digital
transfer of REAC provides extremely flat and pure audio transfer for the whole
frequency bandwidth. Furthermore, additional audio benefits occur because the
source signal is transferred after boosting the gain using the high quality and
remote controllable mic pre-amps.
Minimize a signal’s damage due to “noise pollution”
Hums and buzzes from external noise sources can often be a problem for
Analog Multi Cable
Digital Snake
analog snake installation. It can be difficult to know where potential noise
sources might be before installing a snake. And solving subsequent noise
problems requires lots of experience and time. REAC provides an effective
solution to these installation problems. Technically, the risk of noise pollution
such as the induction of hums and buzzes into a digital snake is much lower
than in an analog snake, and cross talk is minimal or non existent. This provides
almost complete routing freedom for your cable installations.
S-4000S/H
Ordinary Mic cable (100m)
■ Parameters and
display on S-4000RCS
Parameters : Input channel gain,
Phantom power and PAD settings
Display : Level meters of all input
channels on one screen.
RSS Digital Snake Systems
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Remote Control by computers
A computer can be connected to the REMOTE terminals (RS-232C) of any
digital snake end. Once the S-4000RCS software* is installed, up to 160
channels of a snake system can be remote controlled from your computer
using up to 4 RS-232c ports.
* S-4000RCS software is free and downloadable from www.rssamerica.com.
•REAC, based on the Ethernet 100BASE-TX protocol,
transfers signals using Cat5e cable.
•Durable and reliable connector made by Neutrik
•Up to 40 channels of 24bit/96kHz audio plus MIDI and
remote control data can be transferred in one cable.
Roland’s original Ethernet technology
REAC (Roland Ethernet Audio Communication) is newly designed technology
for digital audio transfer by Roland. The REAC spec provides a high quality and
safe, redundant digital audio transfer system that can be easily installed or integrated for any audio snake application. REAC is a “plug and play” system that
is easy to configure and requires no complex setup or computer operation. Plug
in your mics, plug in the Ethernet cable and you’re ready to go!
■ Latency of digital transfer (one way)
* 0.375 ms is the REAC protocol latency. The A/D and D/A
conversions add a bit more for a total latency of less than
1.2ms, which is very low and well within the acceptable
range for all live audio applications.
Digital Transport Advantages
32-channel, 50’ Analog Cable
40-channel, 330’ Cat5e
cable for REAC
Simple and low cost installation with Cat5e cabling
REAC brings another revolution to audio installations by eliminating the need
to use thick, heavy and hard to handle analog multi-pair cables by transmitting
audio using light, slim and easy to handle Cat5e cable. On one very thin Ethernet
cable, REAC can transfer 40 channels of high quality 24bit/96kHz audio signal
plus MIDI and remote control signals. Since the cable used for REAC transfer is
ordinary Ethernet cable, the low cost and easy availability of the cable is a big
advantage compared with using analog cable. From temporary installations at
concerts to permanent installations in arenas or halls, REAC provides the benefit
of light weight, inexpensive and easy to install cable.
Super low latency digital transmission
Degradation of the audio signal is minimal in any digital transfer system.
However, musicians, performers or even audiences may suffer from the
excessive latency of other digital transfer systems. REAC eliminates these
digital audio transmission problems with its super low latency. Even when
transmitting 40 channels at 24bit/96kHz/Linear, REAC’s latency is only
0.375ms*. This very low latency makes any RSS Digital Snake system perfect
for all audio installations, especially in-ear monitoring systems.
Limitless splitting of all input sources
The RSS Digital Snake systems are designed to provide splits of source audio
using standard Ethernet hardware. Using a standard switching hub, you can
send source audio to multiple recording consoles, a monitor position, broadcast
location and more. No signal degradation will occur from the source’s master
output to the recording or any other split output.
Very long distance snake systems can be designed using
an S-OPT REAC Optical converter
The S-OPT is a REAC optical converter that converts RSS Digital Snake
System REAC signals to and from optical signals for long distance digital audio
transmission. By using the REAC optical converter and optical cables (sold
separately), the REAC transmission distance can be extended to a maximum of
2 kilometers (1.2 miles).
40 Channels of Digital Recording
The SONAR REAC Recording System when used in conjunction with the RSS Digital Snakes
provides the most comprehensive live recording, mixing, mastering and delivery product
available. Capture up to 40 channels of audio from your Digital Snake/V-Mixing System
directly into SONAR all via a simple Cat5e connected to the network port on your PC.
S-4000R
Front of House
S-4000H
STAGE
S-4000S
S-4000SP Splitter
S-1608 SONAR REAC Recording System
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S-4000 Digital Snake System
Input Channel Indicator
This indicates Signal, Clip and On/Off status of
the phantom power for each input channel. The
status of the input channels can be checked even
from the stage.
Mode Selection Switch REMOTE terminal (RS-232C)
Outputs source audio to the Slave and Split devices
Master
It receives Input from the Slave device.
Receives Input from and sends output to the Master
Slave
device.
Split
Receives Input from all of the Master device’s sources.
S-4000S-3208
40CH I/O Modular Rack
This unit has 32 inputs + 8 outputs and is typically installed at
stage side. The AD/DA conversion is 24bit/96kHz. High quality
XR-1 pre-amps are provided for each input channel, which can
accept both mic and line level inputs, eliminating the need for
direct boxes. Phantom power and an input PAD is available for
each channel.
Analog Input Modules
On board 24bit/96kHz AD converters and
high quality mic pre-amps with phantom
power supply.
MIDI terminals
MIDI is transferred down the snake
from both the In and Out MIDI
connectors. These enable the remote
control of mixers or musical
instruments from external MIDI
devices at the stage or FOH positions.
Power Inlets
The Locking Arm is equipped to
prevent accidental unplugging of
the power cord. The DC power
supply connection is provided for
use with an optional redundant
power supply in case of power
supply failure.
Analog Output Modules
On board 24bit/96kHz
DA converters.
Connection for either the dedicated
remote controller (S-4000R) or a
computer installed with the remote
control software (S-4000RCS*).
* S-4000RCS software is free and can be
downloaded from www.rssamerica.com.
REAC Module
Redundant REAC transfer provides
continuation of audio transmission
even in case of accidental damage
of one cable.
Mute All Outputs button
When this button is pressed and held,
all Outputs in the S-4000 system will be
muted. This is convenient for changing
cable connections.
Cooling fans x 3
Internal heat is exhausted using 3
fans on the rear panel reducing the
operational noise of the fans.
Mix Magazine
Certifi ed Hit
RSS Digital Snake Systems
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S-4000S-0832
The 40Ch I/O modular rack
configured to be used at the Front
of House position for connection
to mixing console with ordinary
XLR cables. This configuration
would be used with an
S-4000S-3208 at the stage position.
S-4000S-MR
Modular rack chassis with no
pre-installed In/Out modules.
Designed for custom
configurations such as 24x16 and
40x0.
Input/Output ModulesOptional Configurations for S-4000S
Analog Input/Output Modules
SI-AD4
Analog
Input Module
Digital Input/Output Modules
SI-AES4
AES/EBU
Input Module
Four-channel AES/EBU input and output modules
with Sample Frequency Rate conversion
*Input and Output Modules are not user
installable. Installation must be carried out by an
authorized Roland Service Technician.
SO-DA4
Analog
Output Module
SO-AES4
AES/EBU
Output Module
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