PCSX2 Documentation/SPU2 is more than just sound!: Difference between revisions
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PCSX2 Documentation/SPU2 is more than just sound! (view source)
Revision as of 19:49, 19 July 2015
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#the write-back areas for each core's mixed output. | #the write-back areas for each core's mixed output. | ||
#Reverb Processing, which uses a series of overlapping buffers to generate feedback. | #Reverb Processing, which uses a series of overlapping buffers to generate feedback. | ||
==Free Running Voices== | ==Free Running Voices== | ||
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The SPU2 employs a clever reverberation algorithm that utilizes multiple overlapping read and writeback buffers within SPU2 memory to generate feedback. Each step of the reverb process accesses memory and must test against the IRQ address; for a grand total of 24 IRQ tests per Core. Fortunately, all reverb activity occurs within a specified area of SPU2 memory, so for most games a single simple test can be used to exclude the IRQ test. | The SPU2 employs a clever reverberation algorithm that utilizes multiple overlapping read and writeback buffers within SPU2 memory to generate feedback. Each step of the reverb process accesses memory and must test against the IRQ address; for a grand total of 24 IRQ tests per Core. Fortunately, all reverb activity occurs within a specified area of SPU2 memory, so for most games a single simple test can be used to exclude the IRQ test. | ||
==And It All Applies to SPU2null!== | |||
This is the boring part that I'm going to look to implementing soon: In order for SPU2null to be fully emulation-compliant, it must properly simulate all of these things, which basically means it needs to have a complete sound mixer implemented; including reverb buffering/addressing logic. It probably seems silly, but SPU2null would still be without any platform dependent code or sound drivers, making it an ideal base for emulation analysis and as a base for future plugins. | |||
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