Currently those IDs are not covered by copy-on-write mechanism since that ruins the current design of BKE_sound, But this change allows to move towards system where sound handlers are only valid for an evaluated ID datablocks.
Currently those IDs are not covered by copy-on-write mechanism since that ruins the current design of BKE_sound, But this change allows to move towards system where sound handlers are only valid for an evaluated ID datablocks.