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author superctr <themvrules@gmail.com>2018-08-14 15:56:44 +0200
committer R. Belmont <rb6502@users.noreply.github.com>2018-08-14 09:56:44 -0400
commit9bad37d8cb561bf9dc7b5c48273e9b26f813a119 (patch)
tree09ee103f0fa74eaa13097ab23385027a55091a30 /doxygen/doxy-boot.js
parentc347aec715081d3b4141db059cf1b6db3c3f622a (diff)
Improve Taito Zoom ZSG-2 sound emulation (#3847)
* Improve Taito Zoom ZSG-2 sound emulation zsg2.cpp: implement emphasis filter, this is a noise reduction scheme that amplifies higher frequncies to reduce quantization noise. zsg2.cpp: Add sample interpolation and another adjustable lowpass filter. This seems to be roughly what real hardware does... zsg2.cpp: Improve panning registers and identify DSP output gain registers. * zsg2: minor changes [nw] zsg2: Register 0b appears to be status flags [nw] zsg2: Linear ramping probably makes more sense [nw] * zsg2: slight adjustment of emphasis filter [nw] * zsg2: slight adjustment of emphasis filter #2 [nw] * zsg2: more sober ramping algorithm [nw]
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