replayGain

The ReplayGain to apply to the material, as a linear multiplier. 1 applies nothing.

Set by the engine when a track opens, from the container's tags and the configured mode; see ReplayGainMode. The engine's values are already clamped by the file's own peak, so they cannot clip. Applied on the way into the ring, which is right for a per-track constant and wrong for a live control: the volume is the live one and lives on the other side.