Meridian America Meridian 518 manual Part Appendix 1 Noise Shapes

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Appendix 1 – Noise Shapes	43

Part 3 Appendix 1 – Noise Shapes

The graphs in this appendix show the relative noise spectra in dB for the different shapers, compared with the flat-spectrum dither level for the same word-size.

Noise spectrum

20dB

0dB

-20dB

0Hz

5kHz

10kHz

15kHz

20kHz

25kHz

Above: noise spectrum using High-Pass additive TPDF dither at 44.1kHz

	10dB
spectrum	5dB
	0dB

Noise	-5dB
Noise
	-10dB
	-15dB	5kHz	10kHz	15kHz	20kHz	25kHz
	0Hz	5kHz	10kHz	15kHz	20kHz	25kHz

Above: noise spectrum for Shape A at 44.1kHz.

518 User Guide

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Contents 1992, 1993 Contents Appendix 4 -Resolution Enhancement Simple rules for usingAppendix 2 Hints on Mastering Acknowledgements Sales and service in the UKSales and service in the USA Designed & manufactured in the UK byConventions used in this manual IntroductionAbout this manual About the 500 SeriesConnections Installing yourGeneral precautions UnpackingWhats inside a 518? Planning setupOverview as Preamp Type What else do I need to know? What about analogue sources?CD or LaserDisc playback improvement Overview as Resolution Enhancement Processor TypeMeridian DSP speaker improvement Meridian Surround improvement Overview as Multimedia Processor Type Overview as Mastering Processor Type∙ Normal ∙ Standby ∙ Type ∙ Config Customising featuresStandby Switching onStarting off with Basic operationOut Adjusting the volumeOperating 518 as a Control Unit Type Selecting a sourceShape B DitherFlat Shape aDisplay Advanced operation using the Remote Control Menu Keys Operating 518 as Resolution Enhancer TypeVolume control Muting the soundOperation summary With the Remote ControlMemory Customising 518, an overview Restoring default settingsConfig an overview Config control settingsHow to change to Type or Config How to customiseCustomising, general procedure Config sources and inputsSetting Type Controller Customising using TypeHow to change back to Normal Making changes to an existing setupSelecting Types Customising using ConfigHow to use Config ConfigSetting the Standby mode for Selecting the controller modeSetting the system address for Setting the product address forSetting the Volume display Setting the Blank display option forSetting the Emphasis option for Setting the Volume mode forChoosing source logos Setting up sourcesVol. dB Choosing the Comms type for a source product Changing the input for a sourceChoosing the address of a source product Digital output connection ConnectionsDigital audio connections Digital input connectionsCon Connecting to Meridian Digital speakersCommunications connections To connect to other Meridian 500 Series equipmentMastering Processor PartD1 +2 DescriptionAs a Mastering or Multimedia Processor Type Meridian 500 Comms warningShpB +2 Emph +2Making Recordings Transfer to the final carrier Transfer to editorShaper Advantage 44.1kHz 48kHz Normal Pre-emphasis Noise shaper characteristicsDither Operating BackgroundTransparency in digital systems Digital Audio and QuantisationDynamic Range Noise Shaping with ditherPre and De-emphasis Step up in dynamic range Simple rules for usingStep-down in sample word size No change in sample sizeAdditional technical information SpecificationHelp Maintenance & Service CleaningNoise Part Appendix 1 Noise ShapesAbove noise spectrum for Shape B at 44.1kHz 0Hz 5kHz 10kHz 15kHz 20kHz Requirements for D/A conversion Vulnerability of the signalAudible results of digital errors and editing Appendix 2 Hints on Mastering with noise-shapingAppendix 2 Hints on Mastering Handset Functions Appendix 3 RS232GoTo Functions Jitter and de-jittering Appendix 4 -Resolution EnhancementFrequency Dynamic-rangeDynamic-range optimisation with Pre-emphasis Dynamic-range optimisation with GainShowing CD pre- and de-emphasis curves Dynamic-range optimisation with Noise-shaped Dither DAC or channel enhancement by word-length matching DAC enhancement by using high-frequency ditherIndex ContentsIndex User Guide User Guide