Key digital KD-MAX8X8 User Manual

Rev 0 – Dec 2017

KD-MAX8x8

8x8 Audio Matrix Switcher with built-in Audio DSP

Operating Instructions

Key Digital®, led by digital video pioneer Mike Tsinberg,

develops and manufactures high quality, cutting-edge

technology solutions for virtually all applications where

high-end video and control are important. Key Digital

is at the forefront of the video industry for Home Theater

Retailers, Custom Installers, System Integrators,

Broadcasters, Manufacturers, and Consumers.

Key Digital® Systems :: 521 East 3rd Street :: Mount Vernon, NY 10553

Phone : [phone] Fax : [phone] Web : www.keydigital.com

®

The Experts in Digital Video Technology and Solutions

™

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Table of Contents

Introduction ................................................................ 1

Connections, Buttons and LEDs ................................................ 2

Application Example ......................................................... 5

Quick Setup Guide .......................................................... 6

Settings and Adjustments via Remote ............................................ 6

RS-232 and TCP/IP Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Expansion Configurations .................................................... 12

Specifications ............................................................. 13

Important Product Warnings & Safety Instructions .................................. 14

®

How to Contact Key Digital

Warranty Information ........................................................15

Note: Please visit www.keydigital.com for the latest product documentation and software
downloads. Product features and specifications are subject to change without notice.

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Introduction

Key Digital® KD-MAX8x8 is an 8x8 matrix of analog and digital audio. Inputs and outputs support
balanced or unbalanced analog audio on a 6-pin phoenix connector while digital PCM audio
up to 5.1 channels is supported on RCA connectors. Analog and digital outputs may listen to
independent selections of the connected audio sources and each output features a digital signal
processor for volume, muting, 3-band EQ, balance, and delay. Systems greater than 8x8 may be
achieved using multiple units.

Key Features

› Multi-format Audio Multiplexing: DSP per output for independent matrix selection

» Analog to Analog Matrix with DSP

» Digital to Analog Matrix with DSP

» Digital to Digital Matrix

» Analog to Digital Matrix

› Audio DSP: Variable level settings for volume, muting, 3-band EQ, balance, and lip-sync delay

per balanced output

› Audio Delay: Variable level set from 0ms to 170ms
› Audio Conversion: Analog to digital. Digital to analog
› Balanced or Unbalanced: Input audio type may be specified per input
› Lossless Compressed Digital Audio: Dolby
› Long Cable Runs: Enabled by balanced audio connection, signals may be run up to 1,000 ft.
› Expansion Configurations: Custom configurations available for incrementally expansion using

multiple units

» Up to 8 sources/inputs with up to 64 zones/outputs

» Up to 16 sources/inputs with up to 64 zones/outputs

» Up to 24 sources/inputs with up to 32 zones/outputs

» Up to 32 sources/inputs with up to 32 zones/outputs

› Control Integration: TCP/IP, RS-232, and USB with full bi-directional operation, front panel push

buttons and LEDs, front/rear optical IR, serial IR,

› Control System Support: Key Digital

ready. Fully controllable by all IR, RS-232, and TCP/IP supported control systems via open API:

®

AMX

, Crestron®, Control4®, KNX®, RTI®, Savant, URC®, Leviton® etc.

› Key Digital

Digital

®

App Ready: Scan & detect population for pre-built GUI and TCP/IP control via Key

®

App

Accessories

› Power supply: +12V/2A (25W), model KD-PS12V2ASC
› IR Remote control, model KD-REMOTEHM88
› (17) 6-position terminal block
› Rack mount ears

Rack Mounting

› Secure the included rack ears to each side of KD-MAX8x8 with the supplied hardware, then

fasten the unit to the rack rails with appropriate machine screw.

®

and DTS surround up to 5.1ch pass-thru

®

App ready, Compass Control® Pro ready, KD-Wizard®

2 3

Connections, Buttons and LEDs

Balanced/Unbalanced Analog Audio Inputs and Outputs

› Each output and input features one analog audio connector on 6-pin phoenix connector for

balanced or unbalanced audio

› Pin assignment for Analog Audio connections:

» Left + is Pin 1; Left Ground is Pin 2; Left - is Pin 3

» Right + is Pin 4; Right Ground is Pin 5; Right - is Pin 6

› Unbalanced audio is the default type for each input, and should be connected using the positive

(+) and ground pins.

› Each input and accepts/drives audio signals up to 2VRMS with a sampling rate of 48KHz
› Each output features an assortment of DSP controls including Volume, Muting, 3-band EQ, and

Lip-sync delay.

› There are no down/up conversion capabilities. For example, a 2ch analog audio input cannot be

converted to 5.1 surround.

› Microphone inputs are not directly supported. To integrate microphones, please use external

powered mixer.

› Each input may be individually set so that analog is the associated type.

» If the associated input type is set to analog, the output selecting the source will output the

analog feed on both the analog and PCM output connectors.

» The default association type for each input is “both”:

» Analog In to Analog Out

» PCM In to PCM Out

PCM Digital Audio Inputs and Outputs

› Each output and input channel features one digital audio on an RCA connector
› Compatible with SPDIF format IEC 60958 supporting 2CH PCM, Dolby 5.1ch, DTS 6.1ch
› Compatible with sampling rates up to 192KHz
› Each input may be individually set so that analog is the associated type.

» If the associated input type is set to analog, the output selecting the source will output the

analog feed on both the analog and PCM output connectors.

» The default association type for each input is “both”:

» Analog In to Analog Out

» PCM In to PCM Out

› There are no DSP features on the digital audio inputs or outputs. However, muting settings do

apply.

› There are no down/up conversion capabilities:

Audio Input

Signal Format

Audio L/R

Output

Digital Audio

Output

2CH PCM Pass-through Pass-through

Multi-Channel PCM MUTE MUTE

DOLBY/DTS MUTE Pass-through

HD Audio MUTE MUTE

Unit Control Ports

› MAIN Control Port

» 6-Pin Terminal Block for IR and RS-232

» RS-232 and TCP/IP commands may be found in the

RS-232 & TCP/IP Commands section

» Pin out:

» Pin 1 = IR Signal

» Pin 2 = IR Ground

» Pin 3 = RS-232 Tx Data

» Pin 4 = RS-232 Ground

» Pin 5 = RS-232Rx Data

» Pin 6 = Ground (optional)

› TCP/IP Control Port

» Default static IP address is 192.168.1.239

» Connect an Ethernet cable from the KD-MAX8x8 to a network router or connect a straight-

through cable directly from a PC

› Firmware Mode Switch

» Should remain in Operation setting unless instructed by Key Digital technical support

» If changing position of switch, do so only with unit not powered

» Not every firmware update requires the switch to be set to the F/W Load position

» If set to F/W Load, all front LEDs will be illuminated, indicating that

unit is in bootloader mode and awaiting a firmware load.

› Micro USB (front panel)

» Typically used for unit configuration, control, and firmware updates

» It is most commonly used with KD-Wizard

®

software downloaded at www.keydigital.com