Date:  Tuesday, July 19, 1994 5:46:13 PM
Author:  Apple Computer, Inc.
Subject:  VUMeters

Equipment:  Macintosh

Summary:  This application displays VU (Volume Unit) Meters, much like 
are found on tape decks.  The purpose is to monitor the sound input and 
output channels to insure that the proper sound level is present.

Features:  This application can display the levels (both peak reading and 
a more conventional power reading) of the sound at both the input and 
output of the Quadra AV computers.  Users can select whether they want to 
measure levels in terms of the analog voltages at the connectors 
(conventional way) or referenced to the peak level of the AV A/D and D/A 
systems.  Every effort was made to conform to the standard for VUMeter 
dynamics.

This package is useful as a debugging aid when working with sound.  It is 
also useful as a complete example of how to develop code for the Apple 
Real Time Architecture (ARTA) DSP system on the new Quadra AV systems

Requires:  Quadra AV or other system with ARTA DSP (AT&T DSP 3210) system 
installed

Keywords:  VUMeter, sound level meters, ARTA sample code, volume unit
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