User manual ADOBE AUDITION 3

[. . . ] USER GUIDE ADOBE AUDITION 3 ® ® © 2007 Adobe Systems Incorporated. All rights reserved. Copyright Adobe® Audition® 3. 0 User Guide for Windows® If this guide is distributed with software that includes an end user agreement, this guide, as well as the software described in it, is furnished under license and may be used or copied only in accordance with the terms of such license. Except as permitted by any such license, no part of this guide may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, recording, or otherwise, without the prior written permission of Adobe Systems Incorporated. Please note that the content in this guide is protected under copyright law even if it is not distributed with software that includes an end user license agreement. [. . . ] Enter high values to fix very few clicks and leave most of the original audio intact. Enter lower values, such as 20 or 40, if the audio contains a moderate number of clicks. Enter extremely low values, such as 2 or 4, to fix constant clicks. Find Threshold Levels Only Automatically sets the Max (Maximum), Avg (Average), and Min (Minimum) Threshold levels. Max, Avg, and Min Thresholds Determine the unique detection and rejection thresholds for the maximum, average, and minimum amplitudes of the audio. For example, if audio has a maximum RMS amplitude of -10 dB, you should set Max Threshold to -10 dB. If the minimum RMS amplitude is -55 dB, then set Min Threshold to -55. Set the threshold levels before you adjust the corresponding Detect and Reject values. (Set the Max and Min Threshold levels first, because once they're in place, you shouldn't need to adjust them much. ) Set the Avg Threshold level to about three quarters of the way between the Max and Min Threshold levels. For example, if Max Threshold is set to 30 and Min Threshold is set to 10, set Avg Threshold to 25. ADOBE AUDITION 3. 0 145 User Guide After you audition a small piece of repaired audio, you can adjust the settings as needed. For example, if a quiet part still has a lot of clicks, lower the Min Threshold level a bit. If a loud piece still has clicks, lower the Avg or Max Threshold level. In general, less correction is required for louder audio, as the audio itself masks many clicks, so repairing them isn't necessary. Clicks are very noticeable in very quiet audio, so quiet audio tends to require lower detection and rejection thresholds. Detect Determines sensitivity to clicks and pops. Possible values range from 1 to 150, but recommended values range from 6 to 60. Start with a threshold of 35 for high-amplitude audio (above -15 dB), 25 for average amplitudes, and 10 for low-amplitude audio (below -50 dB). These settings allow for the most clicks to be found, and usually all of the louder ones. If a constant crackle is in the background of the source audio, try lowering the Min Threshold level or increasing the dB level to which the threshold is assigned. The level can be as low as 6, but a lower setting can cause the filter to remove sound other than clicks. If more clicks are detected, more repair occurs, increasing the possibility of distortion. With too much distortion of this type, audio begins to sound flat and lifeless. If this occurs, set the detection threshold rather low, and select Second Level Verification to reanalyze the detected clicks and disregard percussive transients that aren't clicks. If you still hear clicks after filtering audio, lower the detection threshold; if audio becomes too distorted, either increase the threshold or select Second Level Verification. Reject Determines how many potential clicks (found using the Detection Threshold) are rejected if Second Level Verification box is selected. Higher settings can prevent clicks from being repaired, as they might not be actual clicks. You want to reject as many detected clicks as possible but still remove all audible clicks. [. . . ] In Adobe Audition, you perform spectral editing to remove noise or process specific frequency ranges. stereo A signal with a left and right channel, allowing for spatial placement of sounds. stripe To copy SMPTE timecode to a single track of a multitrack tape so remaining tracks can be synchronized with other devices. T tempo The rhythmic speed of music, normally measured in beats per minute. (See "beats per minute (bpm)" on page 273. ) timecode An audio or digital signal that synchronizes time between multiple devices. The most common forms are SMPTE and MIDI timecode. ADOBE AUDITION 3. 0 279 User Guide U unity gain An amplification level that precisely corresponds to the input signal level, without amplifying or lowering it. [. . . ]