Click the "Import" icon. Select the audio you want to affect to open the waveform in the sequence window.
Click the "Region Plug-Ins" tab and select the region (song) where you want to apply effects.
Click "Plug-in Chain" to open the drop-down menu. Select the "Compression" and "EQ" effects.
Adjust the "EQ" settings to adjust the volume of specific frequency ranges. Mastering tames difficult extremely low and extremely high frequencies, so you will want to concentrate on these areas.
Adjust the "Compression" settings to bring the waveform's peaks and troughs closer together. This will create more consistent-sounding dynamics. The "Threshold" setting adjusts the decibel level at which the compressor begins to work, and the "Ratio" setting adjusts the amount of compression that is applied once the audio has crossed the decibel threshold. A 2:1 ratio is considered light compression. Adjust the "Volume" on the compressor to increase or decrease the overall track volume.
Press "Play" on the transport bar to listen to the mastered audio.