Tech

How to Modify a Song’s Playback Speed Using Audacity

Use time stretching to change the tempo

need to know

  • Go to and open an audio file. File > Open. choose Done > change time.
  • Then move the progress slider. choose to view to hear and select changes OK.
  • To export the audio as a new file, go to: File > Export. Pick and choose a format save .

The free Audacity audio editor has a playback speed control that also changes the pitch. Use Audacity’s time stretch feature to maintain the pitch of a song while changing its pace. Follow these instructions to learn how to use Audacity’s built-in time dilation tool and save modified files.

Import an audio file and extend time

Follow these steps to change the playback speed of a song in Audacity.

Make sure you have the latest version of Audacity. You can download it from the Audacity website.

Before downloading and using Audacity, please review the privacy policy to make sure you are compatible.

While Audacity is running, select File > Open.

Select the audio file you want to work on by clicking and selecting it. Open.

If you get a message that the file cannot be opened, install the FFmpeg plugin. This adds support for more formats than Audacity offers, such as AAC and WMA.

Audacity open file

Select a snippet and Done > change time to access the time extension option.

Print command+one To select the entire file

Audacity effect changes tempo

To speed up the audio file, move the slider to the right and to view You can also enter a value in the field to listen to a short clip. percent change box if you want.

Changes Audacity timing settings

To slow down the volume, move the slider to the left, making sure the percentage value is negative. As in the previous step, you can also enter an exact value by typing a negative number in the box. percent change cashier. choose to view Scale.

When you are satisfied with the tempo change, OK to process the entire audio file. Your original file remains unchanged at this stage.

Change Audacity time settings ok

Play the audio to check if the speed is appropriate. Otherwise, repeat steps 3 to 6.

Save changes to a new file

If you want to save the changes made, export the audio as a new file. See how:

choose File > Export and choose a format type.

Whatever file format is chosen, you have the option to change it in the window that appears.

Audacity export file type

Enter a name for your file File name text box and select save .

If you see a message that you cannot save to MP3 format, or you get the error lame_enc.dll, download and install the LAME encoder plugin. For more information on how to set it up, read this Audacity tutorial on how to convert WAV to MP3 (go to LAME installation section).

Why should you change the playback speed?

Changing the speed of a song or other audio file can be useful in many scenarios. For example, you might want to learn the lyrics of a song, but you can’t keep up with the words because the song plays so fast. Likewise, if you are learning a new language using a set of audiobooks, you may find that words are spoken very quickly; Slowing things down a bit can increase your learning speed.

The problem with changing the speed of a recording by changing the playback is that it often results in a pitch change. If the speed of a song is increased, the singer may sound like a squirrel.


See more

How to Modify a Song’s Playback Speed Using Audacity

Use time stretching to change tempo

What to Know
Open an audio file by going to File > Open. Select Effect > Change Tempo.
Then, move the tempo slider. Select Preview to hear changes and select OK.
To export the audio as a new file, go to File > Export. Choose a format and select Save.

The free audio editor Audacity has a playback speed control that also changes the pitch. To preserve the pitch of a song while altering its speed, use Audacity’s time-stretching feature. Follow these instructions to learn how to use Audacity’s built-in time-stretching tool, and how to save the changed files.

Import and Time Stretch an Audio File

Follow these steps to modify a song’s playback speed in Audacity.

Ensure you have the latest version of Audacity. You can download it from the Audacity website.

Before you download and use Audacity, review its privacy policy to ensure you’re in compliance.

With Audacity running, select File > Open.

Choose the audio file you want to work on by clicking it and selecting Open.

If you get a message saying that the file cannot be opened, install the FFmpeg plugin. This adds support for more formats than Audacity comes with, such as AAC and WMA.

Select a stretch of audio and choose Effect > Change Tempo to access the time-stretching option.

Press Command+A to select the entire file.

To speed up the audio file, move the slider to the right and click Preview to hear a short clip. You can also type a value in the Percent Change box if you prefer.

To slow down the audio, move the slider to the left, making sure the percent value is negative. As in the previous step, you can also enter an exact value by typing a negative number in the Percent Change box. Select Preview to test.

When you are happy with the change in tempo, choose OK to process the whole audio file. Your original file remains unchanged at this stage.

Play the audio to check that the speed is OK. If not, repeat steps 3 to 6.

Save Changes to a New File

If you want to save the changes you made, export the audio as a new file. Here’s how:

Select File > Export and choose a format type.

Whichever file format you select, you have the option of changing it in the window that appears.

Type a name for your file in the File name text box and select Save.

If you see a message saying that you can’t save in the MP3 format or you receive a lame_enc.dll error, download and install the LAME encoder plugin. For more information on installing this, read this Audacity tutorial on converting WAV to MP3 (scroll down to the LAME installation section).

Why Change the Playback Speed?

Changing the speed of a song or other type of audio file can be useful in many scenarios. For example, you might want to learn the lyrics to a song but can’t follow the words because it plays too quickly. Similarly, if you’re learning a new language using a set of audiobooks, you might find that the words are spoken too quickly; slowing things down a bit could improve your learning speed.

The problem with changing the speed of a recording by altering the playback is that it typically results in changing the pitch, too. If a song’s speed increases, the person singing could end up sounding like a chipmunk.

#Modify #Songs #Playback #Speed #Audacity


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