Perceived loudness comes from arrangement space and saturation — a mix with gaps sounds louder than a full, crushed one

The source states a counter-intuitive loudness principle: perceived loudness comes from arrangement space and saturation, not from crushing everything, and a mix with gaps (mud cleared, sidechain space) sounds louder than a full one. This reframes loudness as a compositional and timbral strategy rather than a mastering one. Clearing the mud zone, sidechaining for breathing room (sidechain-pump), and saturation (which adds harmonics without raising the peak level, saturation-drive) all add more perceived loudness than compressing and limiting harder. For livecoding, arrangement decisions — what to cut, when to leave silence — are the primary loudness tool.

Examples

Take a dense mix and mute the low-mid mud (high-pass pads above 300 Hz): the remaining elements suddenly sound louder and more defined despite carrying less total energy.

Assessment

Explain the paradox: why does a mix with more empty space and sidechain breathing sound louder than a dense, compressed one? Name the two techniques the source identifies as the primary sources of perceived loudness.