AudioScope
Why Did This Crossfade Get Louder?
Hear why an equal-power crossfade can add about 3 dB at the midpoint when the two sounds are identical and sample-aligned.
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Why does the midpoint get louder?
When two copies are identical and sample-aligned, a linear crossfade adds their midpoint gains to one. An equal-power crossfade adds them to about 1.414, or a rise of roughly 3 dB. Different sounds and timing can change the result.