Open Audacity.
Click “File,” choose “Import” and select “Audio.”
Choose the audio file for the vocal you want to improve in Audacity and click the “Open” button.
Click the “Effect” category at the top of Audacity, choose “Equalization” from the drop-down menu and select “Graphic Equalizer.”
Decrease the graphic equalizer bands at 60 Hz and below to reduce unwanted low frequency information captured by the vocal microphone.
Decrease the graphic equalizer bands anywhere from 60 Hz to 200 Hz to thin out a vocal with too much bass. The closer you get to reducing the 200 Hz band, the thinner it will make the vocal.
Increase the graphic equalizer bands around 150 Hz if the vocal is too thin sounding. This will improve the vocal by giving it some body.
Increase the graphic equalizer bands around 3 KHz to add intelligibility to a vocal. This will improve the vocal by making it clearer.
Increase the graphic equalizer bands around 5 KHz to help a vocal cut through music. This will improve the vocal by adding presence to it.
Decrease the graphic equalizer bands around 5 KHz if your vocal is too bright and has too much presence. This will help the vocal sit back in the mix.
Increase the graphic equalizer bands at 10 KHz and above to add a high-frequency sheen to the vocal, giving it an airy quality.