I will show you how I played my audio or mp3 files at any particular speed. This method will allow you to simply enter in your desired speed.(ex. 1.5 or 1.33)
In my case Im using an audio book [Lord of the flies] I download off youtube as a MP3 file using this program:
http://download.cnet.com/MediaHuman-YouTube-to-MP3-Converter/3000-2140_4-7544580 3.html
First off, you will need to make sure your audio file is open in QuickTime player rather then iTunes. First you need to locate the audio file. If your audio file is in itunes then right click the file and select "Show in Finder"
The file should open in a finder window, highlighted. Right click the file, go to "Open With.." And click Quicktime Player. (If quickTime Player is not an option, you need to go to "Other..." and select QuickTime Player from your Applications folder)
Now that your mp3 file is open in a QuickTime window you may proceed to step 1.
1) Open Finder
2) Click Applications
3) Click Utilities
4) Open AppleScript Editor
5) In the program copy and paste the script below.
6) Click "Compile"
7) Now to test this script, click "Run" A window should pop up prompting you to enter your desired speed (default is 1.5)
8) press "OK" and quick time should start playing your audio at the speed you entered in.
9) If you would like to use this script again, go to File > Save... >Name your AppleScript and save it Anywhere (I saved mine in the Music Folder for easy access)
tell application "iTunes"
pause
set myTrack to location of current track
# the player’s position within the currently playing track in seconds
set mySeconds to player position
end tell
# show a Dialog
set SpeedFactor to 1.5
display dialog "Enter speed factor:" default answer SpeedFactor
set SpeedFactor to text returned of the result
tell application "QuickTime Player"
activate
# pause all previously opened documents
set open_docs to documents
repeat with doc in open_docs
pause doc
end repeat
# open the track just played in iTunes
open myTrack
# get the 'QuickTime' document, MyTrack should be equivalent but it isn't
set MyMovie to first document
# rewind by 10 seconds
if mySeconds > 10 then
set mySeconds to mySeconds - 10
end if
# set current time
set current time of MyMovie to mySeconds
# set Speed Factor and start playing
set rate of MyMovie to SpeedFactor
end tell