diff options
author | Brian Troha <briantro@users.noreply.github.com> | 2007-12-23 15:21:00 +0000 |
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committer | Brian Troha <briantro@users.noreply.github.com> | 2007-12-23 15:21:00 +0000 |
commit | 975f32f1cca2f49f87f7a4783e84ce87182889f3 (patch) | |
tree | 2cf675bf31a68e57375bb1acbdf730970bc83281 | |
parent | 28e5db00d5e18c937cb9de281656003ef65315b6 (diff) |
Changes LFO Frequency table entry 232 from 13.35547 to 14.35547 as per discussions of the list. Adds notes about it and the other error in the manual. IE entry 201 & 202 were the same 3.74490 and 202 has been changed to 3.92 which is "about right"
-rw-r--r-- | src/emu/sound/ymf271.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/src/emu/sound/ymf271.c b/src/emu/sound/ymf271.c index 204db210961..a5b0fb14c12 100644 --- a/src/emu/sound/ymf271.c +++ b/src/emu/sound/ymf271.c @@ -158,6 +158,14 @@ static const double DCTime[] = 11.41, 9.12, 7.60, 6.51, 5.69, 5.69, 5.69, 5.69 }; +/* Notes about the LFO Frequency Table below; + + There appears to be at least 2 errors in the table from the original manual. + + Both 201 & 202 where listed as 3.74490. 202 has be changed to 3.92000 which is "about right" + 232 was listed as 13.35547. We use 14.35547 as it apears to be the correct value +*/ + static const double LFO_frequency_table[256] = { 0.00066, 0.00068, 0.00070, 0.00073, 0.00075, 0.00078, 0.00081, 0.00084, @@ -189,7 +197,7 @@ static const double LFO_frequency_table[256] = 5.38330, 5.55696, 5.74219, 5.94019, 6.15234, 6.38021, 6.62560, 6.89062, 7.17773, 7.48981, 7.83026, 8.20312, 8.61328, 9.06661, 9.57031, 10.13327, 10.76660, 11.11391, 11.48438, 11.88039, 12.30469, 12.76042, 13.25120, 13.78125, - 13.35547, 14.97962, 15.66051, 16.40625, 17.22656, 18.13322, 19.14062, 20.26654, + 14.35547, 14.97962, 15.66051, 16.40625, 17.22656, 18.13322, 19.14062, 20.26654, 21.53320, 22.96875, 24.60938, 26.50240, 28.71094, 31.32102, 34.45312, 38.28125, 43.06641, 49.21875, 57.42188, 68.90625, 86.13281, 114.84375, 172.26562, 344.53125 }; |