Download and install Audacity. Run the program on your computer after installation.
Navigate to Audacity's "File" menu and then select "Open" to locate a song on your computer to work with.
Locate the “Effect” menu and select the “Equalization” option.
Draw a curve with the equalization tool to reduce bass. Start low and slowly meet the “0 dB line” in the center on the equalization box. The bass level should stay on the “0 dB line” after it is adjusted.