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-rw-r--r--OpenAL32/alFilter.c12
1 files changed, 6 insertions, 6 deletions
diff --git a/OpenAL32/alFilter.c b/OpenAL32/alFilter.c
index 9e10595a..72eff9bb 100644
--- a/OpenAL32/alFilter.c
+++ b/OpenAL32/alFilter.c
@@ -388,12 +388,12 @@ void ALfilterState_setParams(ALfilterState *filter, ALfilterType type, ALfloat g
break;
case ALfilterType_HighPass:
alpha = sinf(w0) * sinhf(logf(2.0f) / 2.0f * bandwidth * w0 / sinf(w0));
- filter->b[0] = (1.0f + cosf(w0)) / 2.0f;
- filter->b[1] = 1.0f + cosf(w0);
- filter->b[2] = (1.0f + cosf(w0)) / 2.0f;
- filter->a[0] = 1.0f + alpha;
- filter->a[1] = -2.0f * cosf(w0);
- filter->a[2] = 1.0f - alpha;
+ filter->b[0] = (1.0f + cosf(w0)) / 2.0f;
+ filter->b[1] = -(1.0f + cosf(w0));
+ filter->b[2] = (1.0f + cosf(w0)) / 2.0f;
+ filter->a[0] = 1.0f + alpha;
+ filter->a[1] = -2.0f * cosf(w0);
+ filter->a[2] = 1.0f - alpha;
break;
case ALfilterType_BandPass:
alpha = sinf(w0) * sinhf(logf(2.0f) / 2.0f * bandwidth * w0 / sinf(w0));