Represents the "Volume" entry of the movie activation dictionary object.

It is an optional entry defined as part of the PDF 1.0 specification.

It contains a double representing a PDF numeric object.

It should have a minimum value of 0 and a maximum of 1.

The PDF specification states that this item assumes a value of 1 if no value has been provided.

For definitive details see:.

The ISO PDF Specification, ISO 32000-1:2008 PDF 1.7; Table: 296, page 508.

The ISO PDF Specification, ISO 32000-2:2017 PDF 2.0; Table: 307, page 635.

The Volume entry holds the audio volume as a real number from 0.0 (silent) to 1.0 (full volume). Values greater than 1.0 are not standard and may be clamped by the player.