Tracklist
| A1 | Hardrock |
| A2 | Metal Beat |
| A3 | Karabali |
| B1 | Junku |
| B2 | People Are Changing |
| B3 | Sound-System |
Barcode and Other Identifiers
- Barcode (Text): 0 7464-39478-4
- Barcode (Scanned): 074643947848
Other versions
| Category | Artist | Title (Format) | Label | Category | Country | Year |
|---|---|---|---|---|---|---|
| FC 39478 | Herbie Hancock | Sound-System (LP, Album) | Columbia | FC 39478 | US | 1984 |
| 28AP 2918 | Herbie Hancock | Sound-System (LP, Album) | CBS/Sony | 28AP 2918 | Japan | 1984 |
| SRCS 9509 | Herbie Hancock | Sound-System (CD, Album, Ltd, RE, RM, Pap) | Sony Records | SRCS 9509 | Japan | 1998 |
| CBS 26062 | Herbie Hancock | Sound-System (LP, Album) | CBS | CBS 26062 | UK | 1984 |
| 20.585 | Herbie Hancock | Sound-System (LP, Album, Promo) | Columbia, Discos CBS | 20.585 | Argentina | 1984 |
