Why lullaby and piano tracks should not be mastered loud

A loud lullaby is a skip. Sleep and study channels live on long sessions. Heavy limiting removes the decay that makes piano feel calm, then the video feels like an ad.

Retention is the real meter

If average view duration drops after you “make it YouTube loud,” the master is the suspect. Compare the same video with a -16 LUFS master versus a -11 LUFS smash.

What to aim for

Piano / Lullaby: about -16 LUFS, True Peak -1.0 to -1.5 dBTP, lower processing amount. Keep the space between notes.

Voice-over on top

If you talk over the piano, the music should sit under the voice. A loud instrumental master fights the mic and you will duck it anyway. Master quieter first.

Use the Piano / Lullaby preset on Suno Audio Lab instead of a generic “louder” profile.

FAQ

Will a quiet master lose the algorithm?

YouTube cares more that people stay. A gentle master that holds a 2-hour sleep video beats a loud master that gets closed at minute three.