Meridian Digital Audio Processor Meridian 518 Manuel d'utilisateur télécharger pdf (Page 36)

About the Noise Shapers 36

518 User Guide

Noise shaper characteristics

Each noise shaper presents a different degree of subjective noise

reduction – we call that its ‘advantage’ – compared with normal dithering

using white TPDF dither. Each shaper also has a different degree of HF

boost. The parameters are summarised in the table below.

Shaper Advantage

44.1kHz 48kHz

Normal Pre-emphasis Normal Pre-emphasis

Flat TPDF 0.0dB 3.4dB 0.0dB 3.4dB

High-pass 3.5dB 7.0dB 3.5dB 7.0dB

Shape A 6.4dB 12.2dB 6.4dB 12.2dB

Shape B 19dB 22.6dB 19.6 23.6dB

Shape C 15.1dB 17.9dB 18.6dB 21.4dB

Shape D 15.3dB 21.5dB 19.9dB 23.5dB

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MERIDIAN 518 USER MANUAL 1
Contents 2
Sales and service in the UK 4
Sales and service in the USA 4
Acknowledgements 4
Introduction 5
About this manual 5
About the 500 Series 5
Unpacking the 518 6
Installing your 518 6
Planning setup of 518 7
What's inside a 518? 7
Overview as Preamp (Type 0) 8
What about analogue sources? 9
What else do I need to know? 9
(Type 1) 10
Meridian Surround improvement 11
518 User Guide 12
Customising features 13
Starting off with 518 14
Basic operation of 518 14
Selecting a source 15
Adjusting the volume 15
0 0 0 0 0 0 0 0 16
16 data bits 16
18 data bits 16
Emphasis Light 18
Clip Display 18
Software version 18
Putting the 518 in Standby 18
Coming out of Standby 18
Muting the sound 19
Menu Keys 19
Volume control 19
Gain control 19
Operation summary 20
Customising 518, an overview 21
How to customise 518 22
Customising using Type 23
Customising using Config 24
Selecting the controller mode 25
Setting the Volume display 26
Setting up sources 27
Connections 29
Communications connections 30
Mastering Processor 31
Description 32
Making Recordings 34
Transfer to editor 35
Transfer to the final carrier 35
Noise shaper characteristics 36
518 Operating Background 37
Noise Shaping with dither 38
Dynamic Range 38
Pre and De-emphasis 38
Simple rules for using 518 39
Specification 40
• FM Radio, 13 bits 41
• Reel-reel tape, 13 bits 41
• Cassette tape, 12 bits 41
• LP, 11 bits 41
Cleaning 42
Maintenance & Service 42
Appendix 1 – Noise Shapes 43
Noise Spectrum 44
Frequency 44
Vulnerability of the signal 46
Appendix 3 – RS232 48
Jitter and de-jittering 49
• one bit noise reduction 53
Index 55 55
Index 56 56
Notes 57 57
Notes 58 58

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Meridian Digital Audio Processor Meridian 518 Manuel d'utilisateur Page 36

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