This Audacity tutorials will demonstrate how to use several of the tools on the Effects menu.
Noise Reduction
Noise reduction is useful if you hear an audible hiss or buzz or any repeated noise that you would like to remove from throughout your audio track. Simply select a representative sample of the objectionable sound and select Noise Removal from the Effects Menu. Click on Get Noise Profile. This "teaches" Audacity what sound to recognize as noise (your objectionable audio). Then select the whole track, go back to the Effect Menu and choose Noise Removal, and click Remove Noise.
Equalizer/Bass Boost
Audacity has the ability to change the volume of certain bands of frequencies, much like an equalizer can do for your home stereo. This allows you to reinforce or emphasize bass or treble frequencies for example. The Bass Boost has the same effect as increasing the bass frequency with the
You can apply the Equalizer effect by going to the Effect Menu and selecting Equalization to bring up the Equalizer. This tools works in a similar way to the Envelope Tool. The blue line represents your audio track. The frequencies are listed across the bottom with the low or bass frequencies on the left, the high or treble frequencies on the right and the midrange frequencies in the middle.
By clicking on the line at any location, you will create a handle that can be move up or down to increase or decrease the volume at that frequency.
This is the Equalization after clicking on the line and increasing and decreasing the volumes at the various frequencies. The white dots are the handles that can be grabbed with your mouse.
Bass Boost
The Bass Boost brings up the menu on the left and allows you to select the frequency and then the Boost in decibels (dB). You can click the Preview button to hear the impact your changes have made to the sound track.
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Noise Reduction
