Floating-point DAW mixing gives effectively unlimited headroom, so channel overloads don't distort

Modern DAW mixers use floating-point maths, giving effectively unlimited internal headroom and no noise floor, so overloading individual channel meters does not distort as long as the master output is brought back below clipping. There is therefore no need to chase a target channel meter reading; leaving 24 dB or more of headroom on channels is fine. The level at which signals hit mix processors, however, still matters sonically.

Examples

You can run channel meters “into the red” and simply pull the master down to avoid output clipping without any quality loss, because the summing is floating-point.

Assessment

Explain why floating-point DAW summing makes channel-meter overloads harmless and what still constrains channel level choices.