Assertion: sonar's application | /r/CapableOf | introduce feature
Facets:
value: gradually
type: MANNER
value: to widen their appeal
type: PURPOSE
Source sentences:
text: Even those audio applications that once served a very specific purpose, such as Pro Tools and Acid Pro, are gradually introducing features to widen their appeal as 'all-in-one' digital audio workstations for music production.