How can I increase audio volume of a mp3 file in audacity?

I need to cut a part of mp3 song to make a ringtone. But as I save it in by mobile, the volume is too low for this particular file. Is there a way to increase volume of mp3 file in audacity without distorting quality?

3 Answers 3


Go to Effect>Amplify and mess with it (press preview) until it sounds right. If the waveforms look too big, undo it and try again. Hope this helps :)

I don't think this will add distortion but if it does, I can reach back in my head and dig out the other way of raising the volume.

  • Digital amplification like this won't add any distortion until it hits the format's maximum amplitude. Then it'll hard-clip horribly :)
    – Warrior Bob
    Commented Jan 13, 2013 at 7:58
  • Thanks! That is what I thought but sometimes I do things that end up all weird.
    – b2550
    Commented Jan 13, 2013 at 15:58
  • Audacity will automatically calculate the amplification needed to bring the volume up to 0dB so you shouldn't have to mess around with the values at all, do keep in mind that this only works for one sound file at a time though. You cannot batch-amplify using this process.
    – jdagenet
    Commented Sep 28, 2015 at 18:41

equalisation works a lot better than amp, however even it cannot inc the sound of all mp3 perfectly, sometimes distortion does creep inenter image description here

  • 1
    This doesn't actually show anything about how to increase the volume, it just shows how to get to the Equalizer and is left as an exercise to the user to figure out how that would be helpful. (Which I can't figure out even with 15 years of sound experience, particularly since EQs are best done subtractively.)
    – AJ Henderson
    Commented Mar 12, 2014 at 17:44

First normalize to -1dB which is the default. Use function normalize. Then lower it about 18 with amplify. Again that is in function amplify. Next compress it 2.5x1 ratio in function compress. Then check that the make up gain brings you to -1dB else normalize again.


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