Sound Sources ROM 128
| Manufacturer | Yamaha, Sound Sources |
| Function | Accessory |
| Country | USA |
| Form Factor | Part |
| Signal Path | Digital Hardware (including Analog Connections) |
| Links | Banks |
| Notes | DX7 Cartridge - 2 types of RAM (32 or 128 patches) - 1 type of ROM (128 patches) - combined RAM (64 patches)/ROM (64 patches) |