Slow Down – Tempo Change Software

There are many programs for changing bpm (beats per minute) without changing the pitch of the songs. Here are two freeware programs that you can use for changing the tempo.

Slow MP3

Slow MP3 is freeware music player that can slow down the song. It’s written in Java and it runs on Windows, Mac OS and Linux. You can also use it to transpose (change the pitch) and transcribe the songs.

Here’s a quick using guide:

Download Slow MP3 here and start the program.

Open your MP3 or WAV file by dragging it to the Slow MP3 window, or by selecting File -> Open:

Slow MP3 free tempo changing audio editing

Use Speed slider to change tempo. Tempo can be maximally reduced to 50% of the original tempo. On the following image, tempo is reduced to about 25-30% of the original:

Speed Slider for changing tempo of the song

Listen to the audio clips processed with Slow MP3:

Example Audio Clips Processed with Slow MP3

Original audio clip:

Audio clip: Adobe Flash Player (version 9 or above) is required to play this audio clip. Download the latest version here. You also need to have JavaScript enabled in your browser.

Tempo reduced by about 30%:

Audio clip: Adobe Flash Player (version 9 or above) is required to play this audio clip. Download the latest version here. You also need to have JavaScript enabled in your browser.

Tempo reduced by 50%:

Audio clip: Adobe Flash Player (version 9 or above) is required to play this audio clip. Download the latest version here. You also need to have JavaScript enabled in your browser.

Change Tempo in Audacity

Audacity is well-known open source audio recording and editing software. It has many great features, such as Change Tempo feature.

So, download Audacity, install it on your computer and start the program. Open your audio file (by selecting File -> Open). Select whole song by pressing CTRL+a. From “Effects” menu, select “Change Tempo”:

select change tempo in effects menu

In the “Percent Change” field type negative number to reduce tempo, or positive number to increase tempo. Alternatively, you can use the slider, BPM, or Length feature. In the image below, tempo is reduced by 30%:

change beats per minute

Click the “OK” button and it’s done.

Example Audio Clips Processed with Audacity

Original audio clip:

Audio clip: Adobe Flash Player (version 9 or above) is required to play this audio clip. Download the latest version here. You also need to have JavaScript enabled in your browser.

Tempo reduced by 30%:

Audio clip: Adobe Flash Player (version 9 or above) is required to play this audio clip. Download the latest version here. You also need to have JavaScript enabled in your browser.

Tempo increased by 15%:

Audio clip: Adobe Flash Player (version 9 or above) is required to play this audio clip. Download the latest version here. You also need to have JavaScript enabled in your browser.

Which software do you prefer for changing tempo without changing pitch?

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