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sound, improve ym2612 accuracy (NB noticeably slower for low bitrates)

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This commit is contained in:
kub 2021-12-23 00:42:11 +01:00
parent c3fcdf3f8d
commit d127b3f3d5
3 changed files with 361 additions and 438 deletions
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4
pico/sound/ym2612.h
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@ -59,7 +59,7 @@ typedef struct
UINT8 ssgn;
UINT16 ar_ksr; /* 0x32 ar+ksr */
UINT16 vol_out; /* 0x34 current output from EG (without LFO) */
UINT16 vol_ipol; /* 0x36 interpolator memory */
UINT16 pad;
} FM_SLOT;
@ -79,7 +79,7 @@ typedef struct
UINT8 kcode; /* +11 key code: */
UINT8 fn_h; /* freq latch */
UINT8 pad2;
UINT8 upd_cnt; /* eg update counter */
UINT32 fc; /* fnum,blk:adjusted to sample rate */
UINT32 block_fnum; /* current blk/fnum value for this slot (can be different betweeen slots of one channel in 3slot mode) */