How to Adjust Audio Speed in Audacity?

In Audacity, you can speed up and slow down your audio using a Change Tempo or a Change Speed effect.

The difference between the two is that the Change Speed effect will affect the pitch while the Change Tempo effect won’t.

Apply Change Tempo in Audacity:

1. Select your audio recording
2. Go to Effect->Change Tempo
3. Adjust Percent Change
   • Adjust Percent Change below 0 to slow down your audio
   • Adjust Percent Change above 0 to speed up your audio

Normal audio:

100% sped up audio with Change Tempo:

-50% slowed down audio with Change Tempo:

Apply Change Speed in Audacity:

• Select your audio recording
• Go to Effect->Change Speed
• Adjust Speed Multiplier
  • Increase the Speed Multiplier above 1 to speed up audio
  • Decrease the Speed Multiplier below 1 to slow down audio

2 times sped up audio with Change Speed:

0.7 slowed down audio with Change Speed: