Copyright © 2009 Apple Inc. All rights reserved. Your rights to the software are governed by the accompanying software license agreement. The owner or authorized user of a valid copy of Logic Studio software may reproduce this publication for the purpose of learning to use such software. No part of this publication may be reproduced or transmitted forcommercial purposes, such as selling copies of this publication or for providing paid for support services. The Apple logo is a trademark of Apple Inc., registered in the U.S. and other countries. Use of the “keyboard” Apple logo (Shift-Option-K) for commercial purposes without the prior written consent of Apple may constitute trademark infringement and unfair competition in violation of federal andstate laws. Every effort has been made to ensure that the information in this manual is accurate. Apple is not responsible for printing or clerical errors.
Note: Because Apple frequently releases new versions and updates to its system software, applications, and Internet sites, images shown in this manual may be slightly different from what you see on your screen. Apple 1 Infinite LoopCupertino, CA 95014 408-996-1010 www.apple.com Apple, the Apple logo, Logic, Logic Studio, and Mac are trademarks of Apple Inc., registered in the U.S. and other countries. Other company and product names mentioned herein are trademarks of their respective companies. Mention of third-party products is for informational purposes only and constitutes neither an endorsement nor a recommendation. Appleassumes no responsibility with regard to the performance or use of these products.
5 5 5 6
An Introduction to Impulse Response Utility About Impulse Response Utility About the Impulse Response Utility Documentation Additional Resources
7 Understanding Deconvolution and Impulse Responses 7 Impulse Response Recording: Transients Method 8 Impulse ResponseRecording: Sine Sweep Method 9 9 11 12 12 17 18 18 19 20 21 22 23 26 27 28 30 31 Setting Up Your Impulse Response Recording Environment Ideal Impulse Response Recording Setup Alternative Impulse Response Recording Setup Speaker and Microphone Selection Suggestions Speaker and Microphone Placement Suggestions Creating Impulse Responses in Impulse Response Utility Getting to Know the InterfaceUnderstanding the Workflow Creating Your Project Assigning Input and Output Hardware Configuring the Monitoring Parameters Configuring the Sweep Generator Recording Audio into Impulse Response Utility Deconvolving Your Impulse Response Editing Your Impulse Response Auditioning Your Impulse Response Creating a Space Designer Setting Saving, Opening, and Reverting to Saved Projects
Chapter 3Chapter 4
33 Recording Impulse Responses from Audio Equipment 33 Recording Impulse Responses from Guitar Speakers 34 Recording Impulse Responses from Hardware Devices
35 B-Format Surround Encoding 36 Advantages of B-Format Surround Encoding 36 Microphone Suggestions for B-Format Recording 39 Impulse Response Utility Tutorial 39 Creating a Five Channel Surround ImpulseResponse 40 Recording a Mono to Omni 5 Channel Impulse Response
An Introduction to Impulse Response Utility
Impulse Response Utility is a multi-track audio recording and deconvolution application. It is designed to enable you to create your own impulse response files for Space Designer, the convolution-based reverb effect of Logic Studio. Although Space Designercomes with plenty of great sounding Halls, Delays, and other Reverbs, you might want to create an impulse response of your own studio, kitchen, bathroom, or even teapot. This preface covers the following: • About Impulse Response Utility (p. 5) • About the Impulse Response Utility Documentation (p. 5) • Additional Resources (p. 6)
About Impulse Response Utility
Impulse Response Utility is...