Blu-ray discs
type: Concept
broader: sound recordings

DVD
type: Concept
broader: sound recordings

audio tapes
type: Concept
broader: sound recordings

compact discs
type: Concept
broader: sound recordings

concepts
type: Collection
type: ConceptGroup
member: sound recordings

phonograph records
type: Concept
broader: sound recordings

quadrophonic recordings
type: Concept
broader: sound recordings

recording
type: Concept
narrower: sound recordings

sound recordings
type: Concept
broader: recording
narrower: compact discs
narrower: phonograph records
narrower: DVD
narrower: audio tapes
narrower: quadrophonic recordings
narrower: stereophonic recordings
narrower: Blu-ray discs

stereophonic recordings
type: Concept
broader: sound recordings