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S-DSP/Pitch Counter: Difference between revisions
From SnesLab
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* bits 12-15 indicate which 4-bit sample-point within a [[BRR]] block | * bits 12-15 indicate which 4-bit sample-point within a [[BRR]] block | ||
=== | === See Also === | ||
* [[The Infamous Bit-Of-Confusion]] | |||
=== Reference === | |||
* https://problemkaputt.de/fullsnes.htm#snesapudspbrrpitch | * https://problemkaputt.de/fullsnes.htm#snesapudspbrrpitch | ||
[[Category:SNES Hardware]] | [[Category:SNES Hardware]] | ||
[[Category:Audio]] | [[Category:Audio]] | ||
[[Category:Timing]] | |||
Latest revision as of 03:16, 17 July 2023
The Pitch Counter is a hidden register (not part of DSPRAM) that the S-DSP is modifying at the speed of 32kHz. It is at least 15 bits wide, of which:
- bits 4-11 are used as an index into the gaussian interpolation table (in one place fullsnes says bit 3 is used to index as well)
- bits 12-15 indicate which 4-bit sample-point within a BRR block