Audio Decision List

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An Audio Decision List (or ADL) indicates what portions of a WAV file should be extracted to create separate MP3 files for web delivery. Below is an example file, in which the WAV file (u0008_2012038_0000196.wav) is 1801 seconds long, and three segments are to be pulled from it to create MP3 files.

The first one, which will have the addendum "_0001" added to the identifier u0008_2012038_0000196 (the file name prior to ".adl.xml") is 438 seconds long (see "duration", starts at zero seconds into the WAV file, and is entititled "Medley: Have Yourself a Merry Little Christmas and Do You Hear What I Hear."

<?xml version="1.0" encoding="utf-8"?>
<audioDecisionList filename="u0008_2012038_0000196.wav">
   <channel position="mono">
     <minimumSamplePosition unit="seconds">1430.389002</minimumSamplePosition>
     <minimumSampleValue unit="dbfs">-11.075</minimumSampleValue>
     <maximumSamplePosition unit="seconds">1429.624467</maximumSamplePosition>
     <maximumSampleValue unit="dbfs">-11.443</maximumSampleValue>
     <RMS_level unit="dbfs">-24.146</RMS_level>
   <length unit="seconds">1801</length>
 <region id="_0001">
   <in unit="seconds">0</in>
   <duration unit="seconds">438</duration>
   <text type="xhtml">
     <p type="title">Medley: Have Yourself a Merry Little Christmas and Do You Hear What I Hear</p>
 <region id="_0002">
   <in unit="seconds">442</in>
   <duration unit="seconds">180</duration>
   <text type="xhtml">
     <p type="title">Magnificat</p>
 <region id="_0003">
   <in unit="seconds">627</in>
   <duration unit="seconds">298</duration>
   <text type="xhtml">
     <p type="title">Traditional Christmas Medley: The Christmas Song (Chestnuts Roasting on an Open Fire); Deck the Halls; Angels We Have Heard; We Wish You a Merry Christmas</p>

How do we use the ADL files to generate MP3s? See [[1]].

For more information, see "SimpleADL" under Audio_Specifications_and_Standards#Resources_and_Links.