Meridian Audio G68 manual Music and Trifield DSP preset parameters

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D S P p r e s e t s

DSP presets for two-channel material

The G68 provides several signal processing options for two-channel material. The Music DSP presets are designed for use with music from sources such as CD, radio, or two channel DVD-A:

Music, Trifield, Ambisonics, Super Stereo, Music Logic, PLIIx Music, Stereo, and Direct.

The Logic DSP presets are designed for use with film soundtracks or TV programmes:

• PLIIx Movie, PLIIx THX, TV Logic, and Mono.

The Music and Logic DSP presets use the Music and Logic speaker layout respectively; see Speaker layouts, page 43.

Music

The Music DSP preset extracts the mono and surround components of the original recording. These components provide an alternative representation of the original sound, and this is sometimes used for recording systems or in broadcasts such as FM radio. The mono element is equalised using a proprietary Meridian technique to match the tone colour of the centre speaker, and to compensate

Music and Trifield DSP preset parameters

for the fact that the frequency response of human hearing changes with direction.

The Music DSP preset is recommended for recordings made with spaced omnidirectional microphones, or using a mono-surround technique.

Trifield

As for the Music DSP preset, the Trifield preset extracts the mono and surround components of the original recording. It then calculates the signals for the front, left, centre, and right speakers, using the phase and amplitude differences between the three front channels, to redistribute the sounds on a frequency-dependent basis.

This gives a significant improvement over traditional stereo, which converts the differences between the microphone signals into amplitude differences in the speaker signals. This version of the Trifield algorithm is virtually impossible to implement without digital signal processing.

Trifield is recommended for well-made recordings and stereo television broadcasts that are not Dolby Surround encoded. An advantage over the Music DSP preset is that the front stereo image is more focused, and the width of the image can be adjusted.

Parameter

Options

What it changes

Centre

Flat, EQ1-3

The timbre of the centre loudspeaker.

Width†

0-1.5

The width of the image.

Surr. Rear

Surr. Rear, Surr. Side, Surr. All

Switches the surround signal between the side and rear speakers.

R Filter

Off, 1kHz, 3kHz, 7kHz

The cutoff of high frequencies from the rear surrounds.

S Filter

Off, 1kHz, 3kHz, 7kHz

The cutoff of high frequencies from the side surrounds.

†Trifield only.

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Contents G68 Digital Surround Controller Installation Guide Refer all servicing to approved service personnel Safety warningsTo avoid overheating To avoid interferenceContents Sales and service in the USA Sales and service in the UKCopyright and acknowledgements Tel +1 404 344 Fax +1 404 346 Part no GSC/1Product Analogue outputs Digital outputs Digital surround controller modelsG68D Unbalanced Digital Unbalanced Digital YesSmart Source feature Video switchingG68 Digital Surround Controller Formats supportedMulti-zone capabilities Meridian Room CorrectionIntegral tuner Specifications If any of these items are missing please contact your dealer UnpackingAudio inputs Use this connectorTo connect to this G07 24-bit CD Player To connect to a digital source eg G07 24-bit CD PlayerTo connect to an analogue source eg TV tuner G98DH DVD Audio Transport SACD/DVD-A player Digital version G68D Audio outputsDigital outputs Zone 2 and 3 audio outputs Analogue outputsDigital outputs Zone 2 and 3 audio outputs Analogue outputs Digital and analogue version G68ADVZone 2 and 3 audio outputs Unbalanced analogue outputs Analogue version G68AXVBalanced analogue outputs Zone 2 and 3 audio outputs Balanced analogue outputs Balanced analogue version G68XXVDSP5000C To connect the G68D or G68ADV to Meridian DSP loudspeakersPatch box M33 G68ADV/AXV Digital Surround ControllerTo connect an active subwoofer eg Meridian M1500 or M2500 Subwoofer G68 Digital Surround ControllerMain composite outputs Zone 2 & 3 video outputs Video connectionsVideo outputs Video inputs Component outputsUse this output To connect to this Video outputsVideo inputs Use this input To connect to thisTelevision/monitor VCR To control a second room To record audio and videoUse this connection To connect to this Tuner and communications connectionsAuto To connect FM and AM antennae UK use a female Belling-Lee VCR connectorConfiguration Wizard Reset all settings? Reset settingsTo reset the configuration TypeType Speakers Music Sub Logic Sub TypesSelect speakers To configure the speakersOne To change an optionOption Values Description Speaker optionsTo configure a source Configure sourcesPress Source When you have finished configuring sources Radio UseOption Values Source optionsOther settings Stage 4 Configuring other settingsTo configure other settings To change a settingFollowing table summarises the product settings SettingsOption Tuner region Fan is Distance measurementPage Introduction Using a Sound Pressure Level meterTo exit from the calibration procedure To start the calibration procedureTo complete the calibration procedure Left Level +0.0dBLevels Calibration testsDistance Left Phase Fine tuningSetting What it sounds like Left DistanceLeft Size 5/28 Speaker sizeSubwoofer crossover frequency Using the Sine/Sub/Sens controlsSinewave sweep test 81.5Hz 88.5HzPause 80.0Hz 78.5HzTo adjust the sensitivity of a source Setting up sourcesTV 1.4V Peak TV 2.0V ClipSpeaker layouts DSP presetsLayout Description Standard parameters Parameter Range DefaultWhat it changes Music Music and Trifield DSP preset parametersTrifield Parameter Options What it changesAmbisonics Ambisonics and Super DSP preset parametersSuper PLIIx Music DSP preset parameters What it changes MusicLogic DSP preset parameters Parameter OptionsMusicLogic PLIIx MusicDirect Stereo and DirectPLIIx Movie and PLIIx THX SurroundsTV Logic Mono DSP preset parametersMono Parameter OptionsCinema Discrete and Cinema DSP preset parametersDiscrete 28dB to 0dB THXUsing dynamic range control To save the preset settings Defining your own presetsStored To clear a user-defined presetFor example, you could change the name to Standby light not lit General operating problemsErratic or unexpected system behaviour Remote not working Audio problemsUnit is overheating Hum on analogue inputThere is a hiss when starting DTS LaserDiscs or CDs Audible hiss at high volume settingsSound not clear Centre not workingRadio tuner problems Video problemsCleaning MaintenanceTo clean the case, display panel, and keypad To clean the audio and video connectionsService Service and guaranteeGuarantee Calibration procedure 35 moving between tests 36 starting Academy DSP parameter 49 accessoriesCentre DSP parameter 44 THX Music Phase THX Ultra2 Cinema Trifield Rear DSP parameters DSP presets Depth THX Surround EXDynamic range control CinemaD e Clearing 54 editing name Filter DSP parameter 45, 46 THX DSP preset 50D e D e

G68, G68 specifications

Meridian America G68 is a cutting-edge audio processing and distribution system that represents the pinnacle of home entertainment technology. With a focus on high-fidelity audio performance, the G68 is designed to deliver an immersive listening experience that caters to audiophiles and casual listeners alike. This device is an essential component for anyone looking to create a sophisticated and dynamic home theater setup.

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