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Try Audacity which is a free audio file editor. <br />
<br />
<a href="http://audacity.sourceforge.net/download/" rel="ugc">http://audacity.sourceforge.net/download/</a><br />
<br />
Open your file in Audacity and you should be able to go to <b>Effect </b>&gt; <b>Change Speed...</b> slow down what you need. We are not intentionally changing the pitch as there is an option in the program that will allow you to do so intentionally if you so needed. 
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Save and rename, changing .TXT extension to .MP3

Speed-vs-Tempo-mp3.txt

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If you need to know a bit more about Audacity (installation, loading files, exporting, or manipulating tracks) then just ask. &nbsp;Quite a few of us here are pretty conversant with it and may be able to save you some time hunting through help files for the answer.
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brothertruffle. &nbsp;I mentioned &quot;devices&quot; in my previous comment.<br />
<br />
Here is a retail program for $50 that allows you just to load an audio file into its own &quot;player&quot; and immediately modify the tempo:<br />
&quot;Amazing Slow Downer&quot; by Roni Music (versions for Windows and Mac):<br />
<a href="http://www.ronimusic.com/" rel="ugc">http://www.ronimusic.com/</a><br />
<a href="http://www.ronimusic.com/slowdown.htm" rel="ugc">http://www.ronimusic.com/slowdown.htm</a><br />
<br />
This is the area that you are most likely to find such a program, ie. guitarists needing to slow down a piece of music in the same key to learn the parts. &nbsp;There are others, and possibly some will be free, but this is one I have used previously and I know it works:<br />
<a href="http://www.ronimusic.com/samples.htm" rel="ugc">http://www.ronimusic.com/samples.htm</a><br />
<br />
When you see the software writer referring to &quot;stretched&quot;, that is exactly what it does. &nbsp;If you were to apply the tempo effect in Audacity to decrease the tempo of an MP3 file, you would see the playback time of the audio file being lengthened.<br />
<br />
Another one here for $50 named &quot;Guitar and Drum Trainer&quot; that I haven't tested:<br />
<a href="http://renegademinds.com/Products/GuitarDrumTrainer/Features/SlowDownMusic/tabid/94/Default.aspx" rel="ugc">http://renegademinds.com/Products/GuitarDrumTrainer/Features/SlowDownMusic/tabid/94/Default.aspx</a><br />
This one allows you to encode (ie. save out /export your reduced tempo audio as a new file).<br />

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Will Audicity allow me to slow the tempo of the music on a CD? &nbsp;That's what I need.
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Hi brothertruffle.<br />
<br />
No, Audacity only opens audio files. &nbsp;To use it for your purpose you would first have to &quot;rip&quot; one or more tracks from the CD to suitable audio files and then open them separately in Audacity. &nbsp;You can rip tracks from a CD to *.WMA, *.MP3, or to uncompressed large *.WAV files using Windows Media Player, your CD burning software, or any one of the free and retail &quot;CD Rippers&quot; downloadable from the Internet.<br />
<br />
The Amazing Slow Downer that I mentioned in my previous statement WILL do what you need:<br />
<a href="http://www.ronimusic.com/amsldowin.htm" rel="ugc">http://www.ronimusic.com/amsldowin.htm</a><br />
&quot;<i>... just insert the CD and press the play button.</i>&quot;<br />
It is a retail application ($50), but you can test it out before buying.<br />
<br />
Bill<br />
<br />

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I need a program for a Windows XP PC which can take music on a CD or MP3 file and slow down the tune but NOT adjust the pitch. &nbsp;I don't care about other features but this one feature is key.
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I need a program for a Windows XP PC which can take music on a CD or MP3 file and slow down the tune but NOT adjust the pitch.  I don't care about other features but this one feature is key.

Simple audio program to adjust speed of recording but NOT pitch

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