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This question already has an answer here:

Is there any application like amazing slow downer for window or Mac?

Some of the features:

  • Change the speed of the music - from 20% (one fifth speed) to 200% (double speed) without changing the pitch.
  • Wrong key? Change the pitch in semi-tones - at full or changed speed.

  • Out of tune? Adjust the pitch in cents (100ths of a semi-tone) to suit your instrument.

  • Real-time processing - all described above is done in real-time - just insert the CD and press the play button!

  • Also slows down MP3, Wave, Windows Media Audio, Ogg, FLAC and AAC/M4A files on your computer in real-time. Note: M4P files from the iTunes store is now supported.

http://www.ronimusic.com/amsldowin.htm

marked as duplicate by karel, Fabby, waltinator, Elder Geek, Eric Carvalho May 2 '18 at 5:22

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

  • Not as detailed, but vlc does have slowdown/speedup options. – Karthik T Jan 31 '13 at 8:05
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    So does smplayer. Evergreen: If that website goes down this question becomes hard to answer. It is generally a better idea to copy/paste some of the content of the website over and keep the link as a reference. – Rinzwind Jan 31 '13 at 8:40
  • Thank you Rinzwind for help making more clarification, I like it. Also thank you Karthik. I studied both VLC and smplayer, they help for a little speed change, but not specific and have no pitch change too. – evergreen Feb 2 '13 at 16:43
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You could try Audacity (available in the software centre).

http://audacity.sourceforge.net/

http://wiki.audacityteam.org/wiki/Change_Speed

http://manual.audacityteam.org/man/Change_Pitch

And about a million other things :)

There are ones with even more features available but Audacity is the simplest to use I think.

That program you talk about (Amazing Slow Downer) may run in WINE if you can't find anything else that meets your needs. It doesn't look like a very complicated application.

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It look like I've found out the right thing. It's the app Play it slowly

enter image description here

Play it slowly is a light weight application but has a simple , clean interface. It is simple to use and has basic features such as:

Slow the speed on playback without altering pitch. Easily mark, move, and reset sections of a track for playback. Easy to start/stop/restart playback. Play is slowly is in the Debian and Ubuntu repositories

sudo apt-get install playitslowly

The above information is quoted the post: Music practice

by the author bodhi.zazen.

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