Meridian America Meridian 518 Part, Appendix 1

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

Noise spectrum

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

10dB

5dB

0dB

-5dB

-10dB

-15dB

0Hz

5kHz

10kHz

15kHz

20kHz

25kHz

Above: noise spectrum for Shape A at 44.1kHz.

518 User Guide

Contents

Page Contents Page Sales and service in the UK Sales and service in the USA Designed & manufactured in the UK by Acknowledgements Introduction About this manual Conventions used in this manual About the 500 Series Unpacking the Installing your General precautions Connections Siting Planning setup of What's inside a 518 Overview as Preamp (Type 0) Page Overview as Resolution Enhancement Processor (Type 1) Page Overview as Mastering Processor (Type 2) Overview as Multimedia Processor (Type 2) Customising features Starting off with Checking Switching on If there is no display Memory Operating 518 as a Control Unit (Type 0) Selecting a source Adjusting the volume Out Dither Page Emphasis Light Clip Display Software version Advanced operation using the Remote Control Putting the 518 in Standby Muting the sound Menu Keys Operating 518 as Resolution Enhancer (Type 1) Volume control Gain control Operation summary Customising 518, an overview Restoring default settings Type: an overview Config: an overview How to customise Customising, general procedure Customising using Type Customising using Config How to use Config Page Page Setting up sources Page Connections Digital audio connections Communications connections To connect to other Meridian 500 Series equipment Mastering Processor Description 518 as a Mastering or Multimedia Processor (Type 2) Meridian 500 Comms warning Page Making Recordings Transfer to editor Transfer to the final carrier Noise shaper characteristics 518 Operating Background Page Simple rules for using Specification Help Standby point not lit Audible hiss at high volume settings No output with Meridian 565, DSP speaker or DAC No time display with Meridian DSP speaker Cleaning Maintenance & Service Appendix 1 – Noise Shapes Page Page Appendix 2 – Hints on Mastering with noise-shaping Page Appendix 3 – RS232 Appendix 4 –ResolutionEnhancement Jitter and de-jittering Dynamic-range Dynamic-rangeoptimisation with Gain Dynamic-rangeoptimisation with Pre-emphasis Page Page DAC enhancement by using high-frequencydither DAC or channel enhancement by word-lengthmatching Index Page Notes