Linear Acoustic UPMAX2251 Bedienungsanleitung

UPMAX 2251

5.1-Channel Surround-Field Synthesizer

User Guide

UPMAX 2251

5.1-Channel Surround-Field Synthesizer

User Guide

Release Date: March, 2005

Software Version: 1.021 and Later

Linear Acoustic Inc.

Phone: 888-292-3117 (US)

FAX: 717-735-3612

email: www.LinearAcoustic.com

Warranty Information

DISCLAIMER OF WARRANTIES: Products manufactured by Linear Acoustic Inc. are war-

ranted against defects in material and workmanship for a period of two (2) years from the date

of purchase. THERE ARE NO OTHER IMPLIED OR EXPRESS WARRANTIES AND

NO WARRANTY FOR MERCHANTABILITY OR FITNESS FOR A PARTICULAR

PURPOSE.

During the warranty period Linear Acoustic Inc. will repair, or at our discretion replace, com-

ponents which prove to be defective, provided the unit is returned, shipped pre-paid to us directly

with a return authorization (RA) number clearly marked on the packaging. Please note, this

RA number must be present or package will be refused and returned to sender.

All requests for repairs MUST include the unit serial number to ensure quick and accurate service.

DEFECTS CAUSED BY UNAUTHORIZED MODIFICATIONS, MISUSE OR ACCI-

DENTS, UNAUTHORIZED CUSTOMER REPAIRS, OR ANY FURTHER DAMAGE

CAUSED BY INADEQUATE PACKAGING FOR SERVICE RETURN ARE NOT COV-

ERED BY THIS WARRANTY.

PLEASE SAVE THE SHIPPING CARTON AND ALL PACKING MATERIALS. FAIL-

URE TO RETURN UNIT IN ORIGINAL SHIPPING CARTON AND PACKING

MATERIALS WILL RESULT IN A CHARGE FOR NEW SHIPPING MATERIALS.

LIMITATION OF PERIOD OF ACTION ON CONTRACT: No ac tion, regardless of form,

arising out of the transactions under this agreement may be brought by buyer, its successors,

agents and/or assigns, more than three years from date of purchase.

LIMITATION OF LIABILITY: It is understood and agreed that Linear Acoustic’s liability

whether in contract, in tort, under any warranty, in negligence or otherwise shall not exceed the

cost of repair or replacement of the defective components and under no circumstances shall

Linear Acoustic be liable for incidental, special, direct, indirect or consequential damages, or loss

of use, revenue or profit even if Linear Acoustic or its agents have been advised, orally or in

writing, of the possibility of such damages.

Linear Acoustic upMAX 2251 User Guide

Table of Contents

List of Figures...................................................................................................................... vi

Chapter 1: Introduction................................................................................................. 5

1.1 Principles of Operation ......................................................................... 5

1.2 Signals and Levels .................................................................................. 7

1.3 Downmix Compatibility....................................................................... 8

Chapter 2: Connections and Setup ......................................................................... 9

2.1 Unpacking and Inspection..................................................................... 9

2.2 Installation............................................................................................. 9

2.3 Rear Panel............................................................................................ 10

2.3.1 Connection Ports.................................................................. 10

2.4 Front Panel.......................................................................................... 11

2.4.1 What’s Behind Door #1?........................................................ 11

Chapter 3: Applications .............................................................................................. 13

3.1 Typical Scenarios................................................................................. 13

3.1.1 Two-Channel Commercials and Interstitial Programming... 14

3.1.2 Sporting Events ..................................................................... 16

3.1.3 Music Awards-Type Events................................................... 16

3.2 Factory Presets .................................................................................... 17

Chapter 4: Menus .......................................................................................................... 19

4.1 Main Menu .......................................................................................... 19

4.1.1 Modify Processing Menu....................................................... 19

4.1.2 Setup Menu............................................................................ 21

4.1.3 System Info............................................................................ 24

4.1.4 System Options ..................................................................... 24

4.1.5 Lock Front Panel................................................................... 25

Chapter 5: Specifications........................................................................................... 27

Linear Acoustic upMAX 2251 User Guide

List of Figures

1-1 Audio Block Diagram .................................................................................................... 6

2-1 Rear Panel .................................................................................................................... 10

3-1 UPMAX 2251 in a commercial upmixing application ................................................. 14

3-2 UPMAX 2251 with Dolby DP572 Dolby E Decoder ................................................. 15

3-3 UPMAX 2251 in a live sports application ................................................................... 16

3-4 UPMAX 2251 in a music awards-type program .......................................................... 17

4-1 Main Screen showing level meters to the left and menus to the right. ........................ 19

4-2 Modify Processing menu; scroll down to access Ext L/R Mix (as shown on right menu)

4-3 Setup menu ................................................................................................................... 21

4-4 Save Preset menu before (left) and after (right) saving ................................................. 23

Linear Acoustic upMAX 2251 User Guide

Chapter 1: Introduction

The Linear Acoustic UPMAX 2251 produces a 5.1 channel audio signal that is perfect

for eventual transmission via Dolby Digital (also known as AC-3) to all consumers.

The unit accepts a 2-channel input and “upmixes” it to fill as many of the 5.1 output

channels as the user selects. Any input signal from mono to LtRt (Left Total/Right

Total) surround encoded audio can be applied to the Main Input and an output will

be produced that maintains consistency with other 5.1 channel programming.

Further, external discrete sources of audio such as announcer or stereo crowd can be

applied to the unit via its Mix Inputs and can be selectively mixed with the audio pro-

duced by the upmixing process. A subwoofer, or LFE channel can also be selectively

created from the Main Input audio or via the discrete LFE Mix Input.

The UPMAX 2251 provides the following features:

• Advanced upmixing algorithm for stable, convincing surround experience.

• Fully compatible with all surround formats including Dolby Digital

•Upmixed surround field is infinitely adjustable in width and depth.

•External inputs allow mixing of discrete audio signals with internal upmix.

• Relay bypassed digital inputs for “mission critical” broadcast applications.

• Built-in adjustable delays to compensate for video path processing.

• Simple front panel user interface and display.

1.1 Principles of Operation

The UPMAX 2251contains two paths for audio signals. The first path contains an up-

mixer, a bass extension filter to create the LFE (Low Frequency Effects) or subwoof-

er channel, and a simple but powerful set of mix controls to vary each element of the

surroundfield. The second path provides discrete inputs for the Center, LFE, Ls (Left

Surround), Rs (Right Surround), Lf (Left Front) and Rf (Right Front) channels. The

upmixed and discrete outputs are selectively combined to allow for the addition of

specific audio elements to the upmix-derived elements.

Please refer to Figure 1-1. It should be noted that this diagram is a general represen-

tation of signal flow. Please consult the appropriate section of this manual for an ac-

curate description of actual functionality.

Linear Acoustic upMAX 2251 User Guide Introduction

Main In

Lt/Rt

Left

Center

Right

UPMIXER

Surround

Mix In

Center

Ext Center

Level

Center

Width

Ext LFE

Level

80 Hz

Mix In

LFE

Surround

Width

Ext Ls

Level

Ext Rs

Level

Mix In

Surround

Depth

Ext Lf

Level

Ext Rf

Level

Mix In

Main

Out Rs

Main

Out Ls

Main

Out LFE

Main

Out C

Main

Out Rf

Main

Out Lf

Figure 1-1 Audio Block Diagram

Linear Acoustic upMAX 2251 User Guide Introduction

Two-channel audio is applied via the Lt/Rt Main Input. The audio is upmixed to pro-

duce Left, Right, Center, and Surround signals. The Left and Right outputs of the

upmixer are passed unmodified to the Left and Right Main Output.

The Center channel output of the upmixer is passed through the Center Width con-

trol which varies the amount of center channel audio present at the Center Main

Output versus how much is summed back into the Left and Right Main Output. A

setting of 100% indicates that all of the upmixed Center audio is being fed to the Cen-

ter Main Output, while 0% indicates that all of the upmixed Center audio is being

fed back into the Left and Right Main Output. The 0% setting is the same as “Phan-

tom Center” mode common on some decoders.

The Left, Right, and Center outputs of the upmixer are combined then 80Hz low

pass filtered and when selected via the LCR Sum To LFE switch are passed via the

LCR Sum Level control to the LFE Main Output.

The Surround output of the upmixer is passed through the Surround Depth control

which varies the amount of surround information present at the Ls/Rs Main Output

versus how much is summed back into the Left and Right Main Output. A setting of

100% indicates that all of the upmixed Surround audio is being fed to the Ls/Rs Main

Output, while 0% indicates that all of the upmixed Surround audio is being mixed

back into the Left and Right Main Output.

All outputs of the upmixer can also be selectively combined with signals applies to

the Mix Inputs. The Mix Inputs are available for all channels and have Mix Level

controls that vary from off to +6dB. Note that the +6dB range is provided for con-

venience, but a full-scale signal applied to these inputs can be increased to clipping,

so settings above 0dB should be used carefully and sparingly.

1.2 Signals and Levels

The Linear Acoustic UPMAX 2251 is calibrated for -20dBFS environments, but will

work fine with other reference levels with the minor caveat that the analog LtRt util-

ity output (on the LtRt/Aux DB-25 connector) is fixed at -20dBFS=+4dBu.

The sample rate of the UPMAX 2251 is nominally 48kHz, but the unit will run at oth-

er sample rates as determined by the signal applied to the AES REF input. Please note

that currently this causes the test tones to change slightly in frequency, but has no

effect on the program audio.

Below is a list of the inputs and outputs of the UPMAX 2251:

• Lt/Rt Main Input - Main input to upmixer

•Mix Inputs (C/LFE, Ls/Rs, Lf/Rf) - Direct mix inputs to the main output channels

Linear Acoustic upMAX 2251 User Guide Introduction

•Main Outputs (Lf/Rf, C/LFE, Ls/Rs) - Main audio outputs in SMPTE 320M format

• LtRt Main Output - A utility two-channel downmix of the 5.1 channel program (this

output is also available as an analog signal on the LtRt/Aux connector)

1.3 Downmix Compatibility

Downmixing is the process where the individual channels of a Dolby Digital signal

are combined in order to be reproduced from a given number of channels. For exam-

ple, a 5.1 channel program must be downmixed to be reproduced from a stereo speak-

er system and so the left and right channels are combined with the left and right

surround signals and an attenuated version of the center channel before being output

as a stereo signal. This type of signal is called LoRo (for Left only/Right only).

Downmixing may also produce an LtRt compatible signal by performing a pseudo-

surround encode. A 90-degree phase shift is applied to the surround signals in the

Dolby Digital encoder prior to the actual encoding stage so that after downmixing

from 5.1 to 2-channels in the consumer decoder the signal can be heard in surround

by the many consumers that only have a matrix surround decoder.

An extremely important design goal of the Linear Acoustic UPMAX 2251 was that

the output be downmix compatible. Not only stereo and surround, but also mono-

and it had to sound good in 5.1! A tall order that has been satisfied.

One important thing to remember is that to ensure widest compatibility, the Dolby

Digital encoder must be set to apply a 90-degree phase shift. Luckily, this is the de-

fault position for most of the presets, however please consult the encoders user man-

ual to find the menu location where this setting can be checked.

Andere Handbücher für UPMAX2251

Inhaltsverzeichnis

Andere Linear Acoustic Synthesizer Handbücher

Linear Acoustic

Linear Acoustic UPMAX2251 Bedienungsanleitung

Beliebte Synthesizer Handbücher anderer Marken

Kawai

Kawai MP7 Technisches Handbuch

Joranalogue

Joranalogue Contour 1 Bedienungsanleitung

Full Bucket Music

Full Bucket Music Mono/Fury Bedienungsanleitung

Kawai

Kawai PH50 Bedienungsanleitung

IK Multimedia

IK Multimedia UNO Synth PRO X Bedienungsanleitung

Behringer

Behringer DEEPMIND 12 Bedienungsanleitung

Roland

Roland Gaia SH-01 Bedienungsanleitung

Roland

Roland GR-30 Bedienungsanleitung

Gotharman

Gotharman Gotharman's anAmoNo-box Bedienungsanleitung

Yamaha

Yamaha DX21 Bedienungsanleitung

QuStream

QuStream HDFS-550 Bedienungsanleitung

Modal Electronics

Modal Electronics ARGON8 Bedienungsanleitung

Roland

Roland GS-500 Bedienungsanleitung

Octave

Octave Cat SRM Bedienungsanleitung

Dreadbox

Dreadbox Murmux Initiate Bedienungsanleitung

neutral labs

neutral labs ELMYRA 2 Bedienungsanleitung

Waldorf

Waldorf KYRA Bedienungsanleitung

Tubbutec

Tubbutec Juno-66 Bedienungsanleitung