Expand audio system possibilities with REAC and MADI


The S-MADI REAC Bridge is a bi-directional signal converter between REAC and MADI. This bridge enables connectivity between MADI-equipped digital audio mixers/systems to any REAC-based devices such as the popular M-48 Personal Mixing System, Digital Snakes, V-Mixer Consoles, and Multi-channel Live Recording.

Main Features

  • Bi-directional format conversion between REAC and MADI
  • BNC and Optical MADI ports
  • Supports REAC Embedded Power and Split out for connecting and power additional devics (e.g., M-48 Personal Mixer, S-0808)
  • Support for 44.1/48kHz with WORD, MADI or REAC clocks
  • Preamp and personal mixing control with S-4000RCS (Remote Control Software)


More Info

smadi_reacBridging REAC with MADI
S-MADI is bi-directional format converter between REAC and MADI. Up to 40x40 channels of digital audio transmission is possible between MADI equipment and REAC products such as the Digital Snake series, V-Mixers, and M-48 Live Personal Mixers. Both BNC and Optical I/O ports are included along with support for 56/64Ch mode. Clock source can be selected from REAC, MADI or Word Clock.

smadi_splitREAC SPLIT OUT
The REAC SPLIT OUT port provides audio signal from REAC or MADI enabling a separate monitoring or recording audio signal from the main stream. The SPLIT OUT supports REAC Embedded Power which supplies both the audio stream as well as power to a M-48 Live Personal Mixer or S-0808 Digital Snake.

smadi_remoteRemote Control
A connected Digital Snake can be controlled using the S-4000R Remote Controller. Using the S-4000RCS dedicated software also enables control of Digital Snake and M-48 Personal Mixing setup and monitoring parameters.

REAC Technology
The REAC (Roland Ethernet Audio Communication) protocol is an industry proven, low latency, high quality 24 bit/ 96 kHz audio transport protocol used by the S-1608 and S-0816. The REAC protocol allows the Digital Snake's signal to be "split" to as many positions as required such as monitor, broadcast and recording splits using th S-4000-SP or any standard gigabit Ethernet switch.

MADI Consoles/Devices
The following is a list of digital consoles, interface and other devices that support MADI so can therefore be used with the S-MADI ? opening up the world of REAC products include M-48 Personal Mixing, Digital Snakes and Multi-channel recording.

Digital Consoles
Allen & Heath iLive with M-MADI-A card
Avid Venue MADI Option Card
Calrec - Hydra2 with MADI I/O
DiGiCo D and SD Series MADI included
Harrison Consoles - MADI included
Midas Digital Consoles - Klark Teknik DN9650 Network Bridge with LabX MADIX Network Module
Soundcraft Vi Series MADI included
Studer - D21m Series with MADI I/O
Yamaha - add MY16-MD64 (16 channel master) plus 1 or 2 MY-16EX (16 channel expansion)

Example Configurations

View PDF

View PDF

View PDF

View PDF

View PDF


Sampling Frequency
48 kHz/44.1 kHz
MADI Channel Mode
64 Ch/56 Ch
Front Panel:
REMOTE (D-sub 9-pin type, RS-232C)
Rear Panel:
REAC MAIN (RJ-45 EtherCon type), REAC SPLIT OUT(REAC EMBEDDED POWER, RJ-45 EtherCon type), WORD CLOCK IN (BNC type), WORD CLOCK OUT (BNC type), Coaxial MADI IN (BNC type), Coaxial MADI OUT (BNC type), Optical MADI IN/OUT (SC duplex type)
Power Supply
AC 115 V, AC 117 V, AC 220 V, AC 230 V, AC 240 V (50/60 Hz)
Current Drew
0.7 A (REAC Embedded Power: Maximum)
Size and Weight
482 mm
19 inches
303 mm
11-15/16 inches
44 mm
1-3/4 inches
3.5 kg
7 lbs. 12 oz.
*In the interest of product improvement, the specifications and/or appearance of this unit are subject to change without prior notice.


Oprah’s Lifeclass Production

Oprah’s Lifeclass Production

Harpo Studios drew from their Roland (S-4000S, S-0808, S-0816 and S-1608) digital snakes, along with the S-4000M REAC Merge Unit and S-MADI REAC MADI bridge, for Oprah’s Lifeclass. Click for Details



If you have a question about operating your product S-MADI, please contact our Product Support department by phone or email.

Support Documents

PDF file Introduction to the Digital Snake
PDF file Introduction to the V-Mixing System
Compressed ZIP file S_MADI Dimensions DXF
PDF file S-MADI Owner's Manual
PDF file S-4000RCS Owner's Manual
PDF file S-MADI Brochure
PDF file Digital Snake System Brochure
PDF file V-Mixing System Brochure