Yamaha YMF292

The YMF292, aka SCSP (Saturn Custom Sound Processor) is a multi-function sound chip developed by Yamaha for the Sega Saturn, and was also used in Sega's arcade version of the Saturn, the ST-V, along with the Model 2 and Model 3.

For sound generation, the SCSP contains 32 sound generators which can function in either FM synthesis or PCM digital audio mode. The sound generation hardware is then fed into the FH-1 128-step sound effects Digital Signal Processor, which includes 16 sound effect presets. Finally each audio channel is mixed together, with fully configurable channel combining for various levels of FM generation complexity. This allowed the channels to modulate each other, in practice four generators were connected at a time but all 32 generators could be combined into one channel if desired. The SCSP also included a 7-level interrupt controller.