Slow MP3
by Pekka Kauppila
(Pekka Kauppila Website)

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Author's Website

Operating System:
File Size: 532.27 KB
License Conditions:


System Requirements:

Java Runtime Environment 1.5 or higher

Last Updated: 2010-09-27
For more detail about software : Software Description
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Software Description

Slow MP3 is a musician's music player. It can slow down, transpose and transcribe songs on the fly. Need to learn a song in a different key from the original? No problem. Want to play a fast solo part over and over again, in half speed? Can do. Cannot identify a chord? Slow MP3 will show the notes to you.


  • Play MP3 and WAV files
  • Transpose song to any key
  • Slow down tempo
  • Loop song parts
  • Identify notes and chords

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Works on Mavericks

Yep it slows down and pitch changes on mp3. pretty listenable too.
Seems to trans crib but I hav'nt confirmed accuracy.
Need to use control-click to run as OSx security doesn't like.
Needs latest JAVA

sliders don't work

Will only play mp3. can't use sliders at all.

Nope, doesn't work

Not working on Mac Leopard - Java up to date. Sliders don't work.

Notating/Transposing Vocals

Will this program provide the notes a singer is singing? And then allow me to transpose them to a different key? And provide the chords for a piece of music?

That's what it says in the

That's what it says in the description - just download it and try it out for free and see if you like it.

Works like a charm. Love

Works like a charm. Love the transpose feature! Thanks!

Slow MP3

It's just an interface that plays MP3-files. None of the tools works.

I can't make it slow down or

I can't make it slow down or change key either, I used an mp3 song.

Very useful. I used

Very useful. I used Quicktime Pro for this, but this app changes precisely the key! Thanks!

the whole slowing down part

the whole slowing down part doesn't really work for some reason

I can't make any of it work!

I can't make any of it work! I loaded a song into the program, but don't know how to do anything else.



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