S5504 Brass Section
| Manufacturer | Yamaha |
| Function | Accessory |
| Produced | 1990 |
| Country | Japan |
| Form Factor | Part |
| Signal Path | Digital Hardware (including Analog Connections) |
| Notes | SY/TG55 Series D5504-01 data card and W5504 waveform card. 64 patches, 14 multis, 6 waveforms. |