diff --git a/framework/modules/saf_vbap/saf_vbap.c b/framework/modules/saf_vbap/saf_vbap.c
index d4eac4f8a..eb4dc7d58 100644
--- a/framework/modules/saf_vbap/saf_vbap.c
+++ b/framework/modules/saf_vbap/saf_vbap.c
@@ -681,15 +681,10 @@ void invertLsMtx3D
 )
 {
     int i, j, n;
-    float* tempGroup;
-    float tempInv[9], eye3[9];
+    float tempGroup[9];
+    float tempInv[9];
     void* hSinv;
 
-    for(i=0; i<3; i++)
-        for(j=0; j<3; j++)
-            eye3[i*3+j] = i==j ? 1.0f : 0.0f;
-    tempGroup = malloc1d(9* sizeof(float));
-
     /* pre-calculate inversions of the loudspeaker groups and store into matrix */
     (*layoutInvMtx) = malloc1d(N_group * 9 * sizeof(float));
     utility_sinv_create(&hSinv, 3);
@@ -700,18 +695,13 @@ void invertLsMtx3D
                 tempGroup[j*3+i] = U_spkr[ls_groups[n*3+i]*3 + j]; 
 
         /* get inverse of current group */
-        utility_sinv(hSinv, tempGroup,tempGroup,3);
-        cblas_sgemm(CblasRowMajor, CblasNoTrans, CblasTrans, 3, 3, 3, 1.0f,
-                    (float*)eye3, 3,
-                    tempGroup, 3, 0.0f,
-                    (float*)tempInv, 3);
+        utility_sinv(hSinv, tempGroup, tempInv, 3);
 
         /* store the vectorized inverse as a row the output */
         for(i=0; i<3; i++)
             for(j=0; j<3; j++)
                 (*layoutInvMtx)[n*9+(i*3+j)] = tempInv[j*3+i];
     }
-    free(tempGroup);
     utility_sinv_destroy(&hSinv);
 }
 
@@ -947,15 +937,10 @@ void invertLsMtx2D
 )
 {
     int i, j, n;
-    float* tempGroup;
-    float tempInv[4], eye2[4];
+    float tempGroup[4];
+    float tempInv[4];
     void* hSinv;
 
-    for(i=0; i<2; i++)
-        for(j=0; j<2; j++)
-            eye2[i*2+j] = i==j ? 1.0f : 0.0f;
-    tempGroup = malloc1d(4* sizeof(float));
-
     /* pre-calculate inversions of the loudspeaker groups and store into matrix */
     (*layoutInvMtx) = malloc1d(N_pairs * 4 * sizeof(float));
     utility_sinv_create(&hSinv, 2);
@@ -966,11 +951,7 @@ void invertLsMtx2D
                 tempGroup[j*2+i] = U_spkr[ls_pairs[n*2+i]*2 + j];
 
         /* get inverse of current group */
-        utility_sinv(hSinv, tempGroup,tempGroup,2);
-        cblas_sgemm(CblasRowMajor, CblasNoTrans, CblasTrans, 2, 2, 2, 1.0,
-                    eye2, 2,
-                    tempGroup, 2, 0.0,
-                    tempInv, 2);
+        utility_sinv(hSinv, tempGroup, tempInv, 2);
 
         /* store the vectorized inverse as a row the output */
         for(i=0; i<2; i++)
@@ -978,7 +959,6 @@ void invertLsMtx2D
                 (*layoutInvMtx)[n*4+(i*2+j)] = tempInv[j*2+i];
     }
 
-    free(tempGroup);
     utility_sinv_destroy(&hSinv);
 }