Meridian Audio 568 Calibration tests

Configuring the digital surround processor without a computer

70

Levels

These tests allow you to adjust the output level to each speaker

individually, and it follows the general guidelines from Dolby

Laboratories and Lucasfilm. A Sound Pressure Level (SPL) meter

can be useful at this stage; ask your dealer for more information.

In each test the display shows the speaker being tested, and the

current relative level.

For example:

Left +0.0



If you have an on-screen display it shows:

●Use the > and < keys to move between each of the speakers

in the layout in the sequence: Left, Centre, Right, Side R, Rear

R, Rear L, Side L, and subwoofers.

●Use A and V to adjust the level of the speaker. Ignore any

tonal difference.

For correct THX reproduction you should adjust each speaker to

75dB SPL using an SPL meter. Even if your speakers are not

THX approved this setting is recommended.

If you have Meridian DSP loudspeakers they cannot be set

above +0db.

Note that you cannot set the level of a subwoofer by ear,

because low-frequency noises sound quieter. To set the

subwoofer correctly either use an SPL meter, or set it by ear and

then reduce the subwoofer gain by 15dB to correct for human

hearing.

●When you have completed the Levels section press > or

Store to proceed to the next test.

Calibration tests

Contents

Main Page Sales and service in the UK Sales and service in the USA Designed and manufactured in the UK by Contents Introduction 1 Using the digital surround processor 13 Defining your own presets 23 Configuring the digital without a computer 63 Setting up the digital surround processor 49 DSP presets 37 Configuring the digital using a computer 77 Troubleshooting 105 Glossary 115 Page Introduction T The 568 Digital Surround Processor Digital Signal Processing Meridian High Resolution (MHR) 500 Series communications Meridian Compact Theatre Sample configurations Meridian Digital Theatre Specification and accessories Specification Available accessories Meridian 511 S-patch Box Meridian 519 Demodulator Page DSP presets Multi-channel digital sources Dolby Digital DTS MPEG Surround Multi-channel sources encoded onto two channels Pro Logic TV Logic THX Cinema Ambisonic Conventional stereo sources Music Trifield Super Stereo Music Logic Special DSP presets Mono Stereo and Direct Page Front panel Meridian System Remote Quick guide to operating the 568 with the remote Selecting a source To switch on from standby To select a source Page Adjusting the volume To mute the sound To restore the sound To change the volume To change the DSP preset Changing the DSP preset Changing the display To change the display Page Page Locking and unlocking the menus To lock the menus To unlock the menus Changing the DSP parameters Standard parameters To change a DSP parameter Using a Meridian DSP loudspeaker Standard parameters Changing treble, bass, or phase To change the treble To change the bass To change the absolute phase Changing the listening position To move the listening position to the left or right To change the relative level of the rear or side loudspeakers Changing the integration of the centre To change the relative delay of the centre speaker To change the relative level of the centre speaker Changing the spaciousness of the sound To change the relative delay of the rear or side speakers Changing the lip sync and on-screen display To adjust the lip sync To change the position of the on-screen display Changing the DSP preset for a source To change the DSP preset for a source Defining your own presets To save the preset settings Page To clear a user-defined preset DSP presets T Logic DSP presets Pro Logic THX Cinema Pro Logic and THX Cinema DSP preset parameters TV Logic TV Logic DSP preset parameters Mono Mono DSP preset parameters Music DSP presets Music Trifield Music and Trifield DSP preset parameters Ambisonic Super Stereo Ambisonic and Super Stereo DSP preset parameters Music Logic Music Logic DSP preset parameters Page 5.1 Movie DSP presets Dolby Digital DTS MPEG Dolby Digital THX, DTS THX, and MPEG THX 5.1 Movie DSP preset parameters Using dynamic range control Using peak-level limiting Setting up the digital surround processor T Unpacking Radio interference Positioning the digital surround processor Safety warnings To avoid overheating To avoid interference 52 Connecting the digital surround processor Rear panel Digital audio inputs Analogue audio inputs Audio outputs Communications connections Other connections Connecting video On-screen display Connecting speakers To connect to Meridian DSP loudspeakers To connect to active loudspeakers (eg Meridian M33s) To connect to a stereo power amplifier (eg Meridian 556 or 557) To connect an active subwoofer (eg Meridian M1500 or M2500) Connecting sources To connect to a digital source (eg Meridian 508.24 24-Bit CD Player) To connect to an analogue source (eg Meridian 504 FM Tuner) To connect to a DVD player (eg Meridian DVD Player) To connect to a LaserDisc player To connect to a 562 or 562V Multimedia Controller Connecting to other Meridian equipment To connect to other Meridian 500 Series equipment Page Choosing a standard setting To select a Type To set up the 568 for use with a 562 or 562V Multimedia Controller Standard source settings Calibrating the system Using the calibration procedure Using a Sound Pressure Level meter To choose the distance units To start the calibration procedure Page Calibration tests Levels Distance Fine tuning Page Setting up subwoofers To turn on Sine/Sub mode To turn off Sine/Sub mode To adjust the subwoofer crossover frequency To use the sinewave sweep test To change the sweep rate To change the volume To select the channel To select other test signals Page Setup Speakers The Meridian Configuration program Sources Presets Installing the Meridian Configuration program Requirements To install the Meridian Configuration program Planning the configuration To run the Meridian Configuration program To connect the serial cable Creating a new settings file To enter your personal details To display the settings To display or edit the settings Setting up speakers To specify the speaker layout Mains Centre Surrounds Subwoofers Speaker protection To specify the speaker sizes Peak-level limiting To complete the speaker setup Subwoofer filtering and type Setting up sources To configure the source options To set up sources Page To set the advanced source options Configuring presets To set up presets To modify a built-in preset To restore the DSP parameters to their defaults To create a user-defined preset Page Changing the setup options To change the setup options Page Calibrating the settings with your system To save the settings To print a summary of settings To store the settings to the digital To calibrate the loudspeakers To fetch the calibrated settings Creating a User Type To name the User Type To create additional User Types To copy settings between User Types Completing the configuration To save the current settings To store the settings to the 568 Digital Page Page General operating problems Standby point not lit Erratic or unexpected system behaviour Remote not working Page Audio problems Hum on analogue input There is radio interference Audible hiss at high volume settings Crackling on optical inputs Sound not clear Centre not working There is a hiss when starting DTS LaserDiscs Video problems Poor picture quality Meridian Configuration program problems Preset options do not appear or are not available Meridian Configuration program repeatedly fails to talk to the product Service Service and guarantee Guarantee Page Glossary Absolute phase AC-3 Ambisonic Aspect ratio DVD Layout LFE LFE sub Limit Page Page Index A B D C Page F L M G I O R S P T U V Y W