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Play it slowly is a software to play back audio files at a different speed or pitch.


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This project is currently unmaintained. It has been superceded by timestretch player. Play it slowly will likely not work on modern linux distributions anymore. If someone wants to continue working on play it slowly I'd be glad to hand over maintainership.

Play it Slowly Manual


'Play it Slowly' is a tool to help you when practicing or transcribing music. It allows you to play a piece of music at a different speed or pitch.


The following keyboard shortcuts exist:
  • Alt + P or SPACE: Play/Pause
  • Alt + e: Rewind
  • CTRL + 1-9: Rewind (x seconds)

Selecting the audio output device

You can select which audiodevice playitslowly uses by passing a gstreamer sink with the --sink commandline parameter.

Example: playitslowly "--sink=alsasink device=plughw:GT10" or playitslowly "--sink=alsasink device=hw:1"

You can also use other sinks than alsa.

Generic Installation

To install use you need to have the following libraries installed:

  • Python 3.4 or newer
  • PyGI (Python GObject Introspection)
  • GTK3
  • gstreamer 1.0 including the soundtouch/pitch element (included in gstreamer-plugins-bad)

Normally these libraries are already installed on your system.

To install play it slowly execute: python install as superuser (root). If you are using a gnome based system like Ubuntu you can just doubleclick and select run.


The source code of play it slowly is hosted on github:

If you have any questions or a patch just drop me a mail or fill a pull request on github.


Copyright (C) 2009 - 2016 Jonas Wagner

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see <>.

Bugreports / Questions

If you encounter any bugs or have suggestions or just want to thank me - I would like to hear about it!

Known Issues

  • None



Play it slowly is a software to play back audio files at a different speed or pitch.








Contributors 4