3.1. AES11-1991 (ANSI S4.44-1991)

Synchronization of Digital Audio Equipment in Studio Operations

Description

This recommendation provides a systematic approach to the synchronization of digital audio signals. Recommendations are made concerning the accuracy of sample clocks as embodied in the interface signal and the use of this format as a convenient synchronization reference where signals must be rendered cotimed for digital processing Two techniques, the use of Genlock or a Masterclock, are proposed. Synchronism is defined and limits are given which take account of relevant timing uncertainties encountered in an audio studio.

Contents

• Scope
  
• Definitions (Synchronism, Frame, Timing Reference Point)
  
• Area of Application (Digital Interconnections within the Studio Environment, Digital Interconnections Involving Sources and Destinations outside the Studio Environment
  
• Modes of Operation
  
• Recommendations for Equipment Synchronization Practice (Digital Audio Reference Signal, Sample Frequency Tolerances in Equipment, Equipment Timing Relationships, System Practice)
  
• Clock Specifications for Audio Sampling Clocks (Timing Precision, Sample Clock Parameters)
  
• References to Existing Standards
  

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