pub const SOUND_EXISTS_ABSENT: u8 = 0x80;Expand description
What SoundExists resolves to when a node does not carry it.
A genuine oddity: not 0, not 1. Nothing overrides it except an explicit
file value or the runtime downgrade that forces 0 when both Sound and
VO_ResRef fail to resolve, so a reader substituting 0 reports the
downgraded state for every node that merely omitted the field.