AudioLobe allows you to alter the speed of audio playback without changing the pitch rate. Great for learning difficult notes in a musical sequence. You can set a very small section of the audio to loop at whatever playback speed you want and easily follow what is happening, without having pitch changes. AudioLobe 5 has the ability to save audio and video files with altered playback speeds. Key AudioLobe 5 features

Alter playback speed and pitch independently.
Save audio/video with altered playback speeds to new files.
Drag and drop playlist.
Easy to use and intuitive audio controls.
Supports all the common audio and video formats.
Major update to the graphical appearance.
Displays detailed audio track data.
Autosaves column width changes and positions, new preferences for color control.
Separate window for audio indicators and audio power levels.
Many minor improvements for list clearing, software updating, control sizes, help menu, etc.
Play adjusted-rate audio/video files exported by AudioLobe in other free apps such as QuickTime, ReelBean, etc.

Supports the following audio file formats:

AAC (the format commonly used by iTunes, MPEG4 audio, m4a)
MP3
AIFF
CD files
AIFC (AIFF Compressed)
WAV

Homepage: http://www.js8media.com/audiolobe/