| Abbreviation | Definition |
|---|---|
| CR | Crash Ride |
| CRAB | Currently Recruited Active Bandsman |
| CRAMP | Crediton Rural Arts and Music Project |
| CRAP | Country Roots Alternative Pop |
| CRBN | Capital Region Blues Network |
| CREMS | Canberra Recorder and Early Music Society |
| CREMS | Canberra Recorder Early Music Society |
| CRIA | Canadian Recording Industry Association |
| CRME | Council for Research in Music Education |
| CRMF | Canadian River Music Festival |
| CRMP | Croatia Records Music Publishing |
| CRPB | City of Regina Pipe Band |
| CRQ | Crimson River Quartet |
| CRS | Columbia Rhythm Section |
| CS | CD Single |
| CS | Channel Strip |
| CS | Cobra Starship |
| CS | Collective Soul |
| CSB | Chicago Staff Band |
| CSBC | California State Band Championships |