diff --git a/code/client/snd_wavelet.c b/code/client/snd_wavelet.c
index 273862ca..c569b43c 100644
--- a/code/client/snd_wavelet.c
+++ b/code/client/snd_wavelet.c
@@ -30,7 +30,7 @@ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 static void daub4(float b[], unsigned long n, int isign)
 {
 	float wksp[4097] = { 0.0f };
-	float	*a=b-1;						// numerical recipies so a[1] = b[0]
+	float *a=b;
 
 	unsigned long nh,nh1,i,j;
 
@@ -39,21 +39,21 @@ static void daub4(float b[], unsigned long n, int isign)
 	nh1=(nh=n >> 1)+1;
 	if (isign >= 0) {
 		for (i=1,j=1;j<=n-3;j+=2,i++) {
-			wksp[i]	   = C0*a[j]+C1*a[j+1]+C2*a[j+2]+C3*a[j+3];
-			wksp[i+nh] = C3*a[j]-C2*a[j+1]+C1*a[j+2]-C0*a[j+3];
+			wksp[i]	   = C0*a[j-1]+C1*a[j]+C2*a[j+1]+C3*a[j+2];
+			wksp[i+nh] = C3*a[j-1]-C2*a[j]+C1*a[j+1]-C0*a[j+2];
 		}
-		wksp[i   ] = C0*a[n-1]+C1*a[n]+C2*a[1]+C3*a[2];
-		wksp[i+nh] = C3*a[n-1]-C2*a[n]+C1*a[1]-C0*a[2];
+		wksp[i   ] = C0*a[n-2]+C1*a[n-1]+C2*a[0]+C3*a[1];
+		wksp[i+nh] = C3*a[n-2]-C2*a[n-1]+C1*a[0]-C0*a[1];
 	} else {
-		wksp[1] = C2*a[nh]+C1*a[n]+C0*a[1]+C3*a[nh1];
-		wksp[2] = C3*a[nh]-C0*a[n]+C1*a[1]-C2*a[nh1];
+		wksp[1] = C2*a[nh-1]+C1*a[n-1]+C0*a[0]+C3*a[nh1-1];
+		wksp[2] = C3*a[nh-1]-C0*a[n-1]+C1*a[0]-C2*a[nh1-1];
 		for (i=1,j=3;i<nh;i++) {
-			wksp[j++] = C2*a[i]+C1*a[i+nh]+C0*a[i+1]+C3*a[i+nh1];
-			wksp[j++] = C3*a[i]-C0*a[i+nh]+C1*a[i+1]-C2*a[i+nh1];
+			wksp[j++] = C2*a[i-1]+C1*a[i+nh-1]+C0*a[i]+C3*a[i+nh1-1];
+			wksp[j++] = C3*a[i-1]-C0*a[i+nh-1]+C1*a[i]-C2*a[i+nh1-1];
 		}
 	}
 	for (i=1;i<=n;i++) {
-		a[i]=wksp[i];
+		a[i-1]=wksp[i];
 	}
 }