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sound, add ym2612 channel clipping, ladder effect

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kub 2021-11-17 22:27:02 +01:00
parent 55615f9c97
commit 8794ba5c8d
7 changed files with 39 additions and 9 deletions
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4
pico/sound/ym2612_arm.S
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@ -924,6 +924,10 @@ crl_algo_done:
tst r0, r0
beq ctl_sample_skip
orr r4, r4, #8 @ have_output
lsr r1, r0, #31 @ clip (saturate) sample to 14 bit
adds r2, r1, r0, asr #13
subne r0, r1, #0x80000001
asrne r0, r0, #18
tst r12, #1
beq ctl_sample_mono