★ HARDWARE Manual ★ SCSP User's Manual
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SCSP User's Manual / 4.3 Sound Source Register
■ FM modulation control register
- SOUS [15: 0] (R / W); SOUnd Stack
- A data buffer for slot output. A 64-word ring buffer can hold two generations of sampling data. It is used for modulation and slot-to-slot addition processing.
- MDL [3: 0] (R / W); MoDuLation level
- Modulation Specifies the effect (modulation degree) of the input source on modulation.
- Table 4.8 Modulation degree by register setting value
| MDL [3: 0] | 0-4 | Five | 6 | 7 | 8 | 9 | A | B | C | D | E | F |
| Modulation degree (± nπ) | 0 | 1/16 | 1/8 | 1/4 | 1/2 | 1 | 2 | Four | 8 | 16 | 32 | 64 |
- MDXSL [5: 0] (R / W); MoDulation input-X SeLect
- Specifies the source to use as the modulation input X. Specify the source slot of the modulation input X in 2's complement relative to the current slot. Also, when this value is within the range of "1CH" to "3BH", it indicates the latest generation, and when it is out of the range, it indicates that the source is one sample past the latest generation ( see Table 4.9 ).
- MDYSL [5: 0] (R / W); MoDulation input-Y SeLect
- Specifies the source to use as the modulation input Y. Specify the source slot of the modulation input Y in 2's complement relative to the current slot. Also, when this value is within the range of "1CH" to "3BH", it indicates the latest generation, and when it is out of the range, it indicates that the source is one sample past the latest generation ( see Table 4.9 ).
- STWINH (R / W); STack Write IN Hibit
- When this bit is "1B", writing the slot output to the sound stack (SOUS) is prohibited. Normally, "0B" is fine.
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