How System 11 makes sound
Music comes from a YM2151 eight-voice FM synthesizer, converted to analog by a YM3012 DAC and pre-amplified by an MC1458. Sampled and algorithm-generated sounds go through an MC1408 DAC (algorithm sounds were dropped from System 11C). Speech comes from a 55536 CVSD chip, also followed by an MC1458 preamp.
Systems
Related tips
- Which System 11 sound board each game uses
- Using a D-11581 sound board in other System 11 games
- The D-11581 sound board: chips and ROMs
- D-11297, D-11298 and D-12338 sound boards
- Sound circuits on the 11A and 11B CPU boards
- CPU sound diagnostic switch SW1 results
- Game-over music missing: reflow the sound board header pins
- Constant hum instead of sound: shorted capacitor C26 on the sound board
Source: Repairing Williams System 11 Pinball 1986 to 1990, Part Two, Clay Harrell (pinrepair.com)