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-rw-r--r--src/qmmp/equ/iir_fpu.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/qmmp/equ/iir_fpu.c b/src/qmmp/equ/iir_fpu.c
index 6314364b4..fdef54352 100644
--- a/src/qmmp/equ/iir_fpu.c
+++ b/src/qmmp/equ/iir_fpu.c
@@ -122,8 +122,8 @@ __inline__ int iir(float *d, int samples, int nch)
data_history[channel][band].y[i] =
(
/* = alpha * [x(n)-x(n-2)] */
- iir_cf[band].alpha * ( data_history[band][channel].x[i]
- - data_history[band][channel].x[k])
+ iir_cf[band].alpha * ( data_history[channel][band].x[i]
+ - data_history[channel][band].x[k])
/* + gamma * y(n-1) */
+ iir_cf[band].gamma * data_history[channel][band].y[j]
/* - beta * y(n-2) */