diff --git a/lib_com/modif_fs_fx.c b/lib_com/modif_fs_fx.c
index a9b6581ed50b299ea9d021df8086b0750d89366d..46e24e31af8d899d10a3cd489e1ab217bcd3d7b1 100644
--- a/lib_com/modif_fs_fx.c
+++ b/lib_com/modif_fs_fx.c
@@ -1759,8 +1759,8 @@ void interpolate_3_over_1_allpass_fx32(
     {
         mem_temp = out[i]; // Qx
         move32();
-        out[i] = L_sub_sat( Mpy_32_16_1( L_add_sat( mem[12], mem[11] ), 18768 ), Mpy_32_16_1( L_add_sat( mem_temp, mem[10] ), 2424 ) ); // Qx
-        // 0.572769 in Q15 -> 18768, 0.074005 in Q15 -> 2424
+        out[i] = L_sub_sat( Mpy_32_16_1( L_add_sat( mem[12], mem[11] ), 18768 ), Mpy_32_16_1( L_add_sat( mem_temp, mem[10] ), 2425 ) ); // Qx
+        // 0.572769 in Q15 -> 18768, 0.074005 in Q15 -> 2425
         move32();
         mem[10] = mem[11]; // Qx
         move32();
diff --git a/lib_dec/swb_tbe_dec_fx.c b/lib_dec/swb_tbe_dec_fx.c
index 06da2a83d66d55805baf037f53ecd86491cfdc9b..61dc3d0c56749685434360b3a72d0e8d6498a914 100644
--- a/lib_dec/swb_tbe_dec_fx.c
+++ b/lib_dec/swb_tbe_dec_fx.c
@@ -613,6 +613,7 @@ void ivas_wb_tbe_dec_fx(
     Word16 error[L_FRAME16k];
     Word16 synth_frac[L_FRAME16k];
     Word16 upsampled_synth[L_FRAME48k];
+    Word32 tmp_synL[L_FRAME48k], upsampled_synth_32fx[L_FRAME48k];
     Word32 prev_pow, curr_pow, curr_frame_pow;
     Word16 curr_frame_pow_exp;
     Word16 temp, scale, n;
@@ -1181,9 +1182,10 @@ void ivas_wb_tbe_dec_fx(
         }
         ELSE IF( EQ_32( st_fx->output_Fs, 48000 ) )
         {
-            Scale_sig( hBWE_TD->mem_resamp_HB_fx, INTERP_3_1_MEM_LEN, sub( Qx, hBWE_TD->prev_Qx ) );
-            ivas_interpolate_3_over_1_allpass_fx( synth, L_FRAME16k, upsampled_synth, hBWE_TD->mem_resamp_HB_fx );
-            Copy( upsampled_synth, synth, L_FRAME48k );
+            Copy_Scale_sig_16_32_no_sat( synth, tmp_synL, L_FRAME48k, sub( Q11, Qx ) );
+            interpolate_3_over_1_allpass_fx32( tmp_synL, L_FRAME16k, upsampled_synth_32fx, hBWE_TD->mem_resamp_HB_fx_32 );
+            Copy_Scale_sig_32_16( hBWE_TD->mem_resamp_HB_fx_32, hBWE_TD->mem_resamp_HB_fx, INTERP_3_1_MEM_LEN, sub( Qx, Q11 ) );
+            Copy_Scale_sig_32_16( upsampled_synth_32fx, synth, L_FRAME48k, sub( Qx, Q11 ) );
         }
     }
     ELSE