diff options
Diffstat (limited to 'src/emu/sound/discrete.h')
-rw-r--r-- | src/emu/sound/discrete.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/emu/sound/discrete.h b/src/emu/sound/discrete.h index 2abc171fe83..6fb097cea89 100644 --- a/src/emu/sound/discrete.h +++ b/src/emu/sound/discrete.h @@ -3412,6 +3412,8 @@ #define RC_DISCHARGE_EXP_DT(rc, dt) (exp(-(dt) / (rc))) #define RC_DISCHARGE_NEG_EXP_DT(rc, dt) (exp((dt) / (rc))) +#define FREQ_OF_555(_r1, _r2, _c) (1.49 / ((_r1 + 2 * _r2) * _c)) + /************************************* * * Interface & Naming |