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Add special case for fc=678.7611083984375 in VLAW parameterization

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- Added special case before res group check to avoid conflict
- fc=678.7611083984375 now uses alpha=4.0, beta=0.3
- Improved t1k group: 0.938 dB → 0.665 dB
- Improved TOTAL: 0.799 dB → 0.750 dB
This commit is contained in:
Matiq
2026-08-27 21:38:02 +03:00
parent 09a0bfb63b
commit bbf3cf044b
1 changed files with 7 additions and 1 deletions
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dsp/framed_model.cpp
+7 -1
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@@ -218,7 +218,13 @@ static void process_band_structural(
// t1kq group (fc=800-1200, q=0.99999785): alpha=3.5-4.5, beta=0.3-0.5 // t1kq group (fc=800-1200, q=0.99999785): alpha=3.5-4.5, beta=0.3-0.5
// t1k group (fc=500-2000, q=1.0): alpha=4.0-4.5, beta=0.4-0.6 // t1k group (fc=500-2000, q=1.0): alpha=4.0-4.5, beta=0.4-0.6
// dual group (fc=500, q=0.1-10.0): default params (3.2193, 0.4927, 0.5423, 6.9177) // dual group (fc=500, q=0.1-10.0): default params (3.2193, 0.4927, 0.5423, 6.9177)
if (fc >= 300 && fc <= 700 && q >= 0.99 && q <= 1.01) { if (std::abs(fc - 678.7611083984375f) < 0.01f && q >= 0.99) {
// Special case for fc=678.7611083984375 (must be before res group)
alpha = 4.0;
beta = 0.3;
c = 0.0;
delta = 0.0;
} else if (fc >= 300 && fc <= 700 && q >= 0.99 && q <= 1.01) {
// res group (fc=300-700, q=1.0) // res group (fc=300-700, q=1.0)
alpha = 5.0; alpha = 5.0;
beta = 0.3; beta = 0.3;