Sound Normalizer 87 Verified -

For MP3s, it uses the ReplayGain standard. This doesn't just look at the loudest "peak" but uses psychoacoustic analysis to determine how loud a song sounds to a human ear, ensuring a consistent listening experience across different tracks.

If you are looking to verify your audio levels, industry standards typically suggest: This App Cleans Up Your Audio Instantly and For Free! sound normalizer 87 verified

Most free normalization tools are reckless. They scan a file, find a peak at -6 dB, and boost the entire track by +6 dB to hit 0 dB. This works for a single track but fails catastrophically in playlists. For MP3s, it uses the ReplayGain standard

Best for WAV files to bring the highest peak to a specific target. Most free normalization tools are reckless

You can test and normalize the left and right audio channels separately to ensure a balanced stereo image.