When you mix these eras in a single FLAC playlist, the average perceived loudness varies wildly, even if their peak digital volumes look identical on paper. Why You Should Never Use "Normalization"
This is the standard audiophile approach. It adds metadata tags that tell your player how much to adjust the volume during playback without changing the original audio data. flac gain fix
For advanced users, metaflac (included with the FLAC tools) can write ReplayGain tags via the terminal. metaflac --add-replay-gain *.flac Use code with caution. When you mix these eras in a single