diff --git a/apps/decoder.c b/apps/decoder.c
index 5cf6f77f74fc5329417a4c625fb023cc294e3b67..054a219063fd75252a41305e8803e344662371b1 100644
--- a/apps/decoder.c
+++ b/apps/decoder.c
@@ -1649,7 +1649,11 @@ static void resetHeadRotation(
         pPos[i].x_fx = 0;
         pPos[i].y_fx = 0;
         pPos[i].z_fx = 0;
+#ifdef FIX_BASOP_2023_TDREND_DISTATT_PRECISION
+        pPos[i].q_fact = 22;
+#else
         pPos[i].q_fact = 25;
+#endif
     }
 
     return;
diff --git a/lib_com/common_api_types.h b/lib_com/common_api_types.h
index 5b158d957fbb062f99105191ca8d803ec09d0825..0a693d0451ab92c8a693b9f7f563b4b19d6c90c0 100644
--- a/lib_com/common_api_types.h
+++ b/lib_com/common_api_types.h
@@ -63,6 +63,10 @@
 #define IVAS_ER_LIST_HEIGHT              1.6f
 #define IVAS_ER_LIST_HEIGHT_FX           6710886 /* 1.6f in Q.22 */
 #define IVAS_DEFAULT_AEID                65535
+#ifdef FIX_BASOP_2023_TDREND_DISTATT_PRECISION
+#define IVAS_LISTENER_POSITION_MAX     327.67f
+#define IVAS_LISTENER_POSITION_MAX_Q22 1374347592 /* 327.67 in Q22 */
+#endif
 
 /* JBM constants for adaptive-playout */
 #define IVAS_TIME_SCALE_MIN 50  /* min. time-scaling [%] */
@@ -160,7 +164,11 @@ typedef struct
 typedef struct
 {
     float x, y, z;
+#ifdef FIX_BASOP_2023_TDREND_DISTATT_PRECISION
+    Word32 x_fx, y_fx, z_fx; /* Q22, Q22, Q22 */
+#else
     Word32 x_fx, y_fx, z_fx;
+#endif
     Word16 q_fact;
 
 } IVAS_VECTOR3;
@@ -351,7 +359,11 @@ typedef struct _IVAS_RENDER_CONFIG
     float directivity[IVAS_MAX_NUM_OBJECTS * 3];
     Word16 directivity_fx[IVAS_MAX_NUM_OBJECTS * 3]; // has the following q-factor pattern: {6, 6, 15, 6, 6, 15, 6, 6, 15, 6, 6, 15}
     float distAtt[3];
+#ifdef FIX_BASOP_2023_TDREND_DISTATT_PRECISION
+    Word32 distAtt_fx[3]; /* {Q25, Q28, Q28} */
+#else
     Word32 distAtt_fx[3]; /* {Q27, Q30, Q30} */
+#endif
 
 } IVAS_RENDER_CONFIG_DATA, *IVAS_RENDER_CONFIG_HANDLE;
 
diff --git a/lib_com/options.h b/lib_com/options.h
index 499a45afcaccdbf438b8eba5bbfc75c275211997..24be4ca8b9a48d433a042cec0e843179040f948b 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -107,6 +107,7 @@
 
 #define FIX_BASOP_2486_HQ_FINE_GAIN_ALIGNMENT           /* Eri: Basop issue 2486: IVAS BASOP used calculations with truncation, EVS BASOP used rounding. This aligns the use of a table lookup. */
 #define FIX_1540_EXPOSE_PT_IN_RTP_HEADER_API            /* Expose Payload Type setting in RTP Header */
+#define FIX_BASOP_2023_TDREND_DISTATT_PRECISION         /* Eri: Basop issue 2023: Distance attenuation scaling, adding clamping of distance att input and listener position */ 
 #define FIX_BASOP_2511_PROTO_REF_POWER_FIX              /* FhG: BASOP 2511; Fix reference power computation in protoSignalComputation_shd_fx() */
 #define FIX_BASOP_2512_WRONG_SHIFT_IN_DIRAC_CONFIG      /* Nokia: BASOP 2512: Fix wrong division by shift */
 #define FIX_BASOP_2513_EXTRA_RETURN_REND_OPEN           /* Nokia: BASOP issue 2513: Removes extra return block */
diff --git a/lib_dec/ivas_objectRenderer_internal_fx.c b/lib_dec/ivas_objectRenderer_internal_fx.c
index 999fe3824c93ee34ad56e917605469209f9b4a26..814ba4254ff6373368d4ae5eea9c1513cf0282a7 100644
--- a/lib_dec/ivas_objectRenderer_internal_fx.c
+++ b/lib_dec/ivas_objectRenderer_internal_fx.c
@@ -264,7 +264,11 @@ ivas_error ivas_td_binaural_renderer_sf_fx(
             enableCombinedOrientation = st_ivas->hCombinedOrientationData->enableCombinedOrientation[st_ivas->hCombinedOrientationData->subframe_idx];
             move16();
 
+#ifdef FIX_BASOP_2023_TDREND_DISTATT_PRECISION
+            /* Shifting x_fx, y_fx, z_fx to the same Q-factor as Listener_p->Pos_q (usually Q22) */
+#else
             /* Shifting x_fx, y_fx, z_fx to the same Q-factor as Listener_p->Pos_q (usually Q25) */
+#endif
             Word16 pos_q = st_ivas->hBinRendererTd->Listener_p->Pos_q;
             move16();
             tmp_vector_fx->x_fx = L_shr( tmp_vector_fx->x_fx, sub( tmp_vector_fx->q_fact, pos_q ) );
diff --git a/lib_dec/lib_dec_fx.c b/lib_dec/lib_dec_fx.c
index f79e5f233d10e15649773eeb55e946d2f5e28388..c49bf243355ab98557df651359d2a63a37f8af9e 100644
--- a/lib_dec/lib_dec_fx.c
+++ b/lib_dec/lib_dec_fx.c
@@ -44,6 +44,13 @@
 #include <assert.h>
 #include "wmc_auto.h"
 
+#ifndef min
+#define min( x, y ) ( ( x ) < ( y ) ? ( x ) : ( y ) )
+#endif
+
+#ifndef max
+#define max( x, y ) ( ( x ) > ( y ) ? ( x ) : ( y ) )
+#endif
 
 /*---------------------------------------------------------------------*
  * Local structs
@@ -2102,9 +2109,15 @@ ivas_error IVAS_DEC_FeedHeadTrackData(
         return error;
     }
 
+#ifdef FIX_BASOP_2023_TDREND_DISTATT_PRECISION
+    hHeadTrackData->Pos[subframe_idx].x_fx = max( min( IVAS_LISTENER_POSITION_MAX_Q22, Pos.x_fx ), -IVAS_LISTENER_POSITION_MAX_Q22 );
+    hHeadTrackData->Pos[subframe_idx].y_fx = max( min( IVAS_LISTENER_POSITION_MAX_Q22, Pos.y_fx ), -IVAS_LISTENER_POSITION_MAX_Q22 );
+    hHeadTrackData->Pos[subframe_idx].z_fx = max( min( IVAS_LISTENER_POSITION_MAX_Q22, Pos.z_fx ), -IVAS_LISTENER_POSITION_MAX_Q22 );
+#else
     hHeadTrackData->Pos[subframe_idx].x_fx = Pos.x_fx;
     hHeadTrackData->Pos[subframe_idx].y_fx = Pos.y_fx;
     hHeadTrackData->Pos[subframe_idx].z_fx = Pos.z_fx;
+#endif
     hHeadTrackData->Pos[subframe_idx].q_fact = Pos.q_fact;
     move32();
     move32();
diff --git a/lib_rend/ivas_objectRenderer_fx.c b/lib_rend/ivas_objectRenderer_fx.c
index 8255fe0b7fc61ee358a54f56165ec7ef8e08d6b9..bfa5d30396b09886024bb8878181b4873e3f3064 100644
--- a/lib_rend/ivas_objectRenderer_fx.c
+++ b/lib_rend/ivas_objectRenderer_fx.c
@@ -82,7 +82,11 @@ ivas_error ivas_td_binaural_open_unwrap_fx(
     TDREND_PosType_t PosType;
     Word16 nS;
     const Word32 *ls_azimuth_fx, *ls_elevation_fx;
+#ifdef FIX_BASOP_2023_TDREND_DISTATT_PRECISION
+    Word32 Pos_fx[3]; // Q22
+#else
     Word32 Pos_fx[3]; // Q25
+#endif
     Word32 Dir_fx[3]; // Q30
     TDREND_DirAtten_t *DirAtten_p;
     TDREND_DistAtten_t DistAtten;
@@ -185,6 +189,9 @@ ivas_error ivas_td_binaural_open_unwrap_fx(
         {
             /* Set source positions according to loudspeaker layout */
             angles_to_vec_fx( ONE_IN_Q9, ls_azimuth_fx[nS], ls_elevation_fx[nS], Pos_fx );
+#ifdef FIX_BASOP_2023_TDREND_DISTATT_PRECISION
+            Scale_sig32( Pos_fx, 3, -3 ); /* Q25 -> Q22 */
+#endif
 
             Dir_fx[0] = ONE_IN_Q30;
             move32();
@@ -202,12 +209,21 @@ ivas_error ivas_td_binaural_open_unwrap_fx(
 
             DistAtten.DistAttenModel = TDREND_DIST_ATTEN_MODEL_INV_DIST_CLAMPED; // Q0
             move16();
+#ifdef FIX_BASOP_2023_TDREND_DISTATT_PRECISION
+            DistAtten.MaxDist_fx = 528482304; /* Maximum radius (2^ISM_RADIUS_NBITS-1)*0.25 */ /*15.75 in Q25*/
+            move32();
+            DistAtten.RefDist_fx = ONE_IN_Q28; // Q28
+            move32();
+            DistAtten.RollOffFactor_fx = ONE_IN_Q28; // Q28
+            move32();
+#else
             DistAtten.MaxDist_fx = 2113929216; /* Maximum radius (2^ISM_RADIUS_NBITS-1)*0.25 */ /*15.75 in Q27*/
             move32();
             DistAtten.RefDist_fx = ONE_IN_Q30; // Q30
             move32();
             DistAtten.RollOffFactor_fx = ONE_IN_Q30; // Q30
             move32();
+#endif
 
             // TDREND_SRC_SPATIAL_t *SrcSpatial_p = pBinRendTd->Sources[nS]->SrcSpatial_p;
             IF( NE_32( ( error = TDREND_MIX_SRC_SetPos_fx( pBinRendTd, nS, Pos_fx ) ), IVAS_ERR_OK ) )
@@ -638,7 +654,11 @@ ivas_error TDREND_Update_object_positions_fx(
 )
 {
     Word16 nS;
+#ifdef FIX_BASOP_2023_TDREND_DISTATT_PRECISION
+    Word32 Pos_fx[3]; // Q22
+#else
     Word32 Pos_fx[3]; // Q25
+#endif
     Word32 Dir_fx[3]; // Q30
     ivas_error error;
 
@@ -651,7 +671,12 @@ ivas_error TDREND_Update_object_positions_fx(
         {
             /* Update the source positions */
             /* Source position and direction */
+#ifdef FIX_BASOP_2023_TDREND_DISTATT_PRECISION
+            angles_to_vec_fx( hIsmMetaData[nS]->radius_fx /*Q9*/, hIsmMetaData[nS]->azimuth_fx, hIsmMetaData[nS]->elevation_fx, Pos_fx );
+            Scale_sig32( Pos_fx, 3, -3 ); /* Q25 -> Q22 */
+#else
             angles_to_vec_fx( hIsmMetaData[nS]->radius_fx /*Q9*/, hIsmMetaData[nS]->azimuth_fx, hIsmMetaData[nS]->elevation_fx, Pos_fx );
+#endif
             angles_to_vec_fx( ONE_IN_Q14, hIsmMetaData[nS]->yaw_fx, hIsmMetaData[nS]->pitch_fx, Dir_fx );
 
             // DirAtten_p->ConeInnerAngle_fx = DEG_360_IN_Q22;
@@ -674,7 +699,11 @@ ivas_error TDREND_Update_object_positions_fx(
             {
                 Pos_fx[0] = 0;
                 /* Pos[1] = hIsmMetaData[nS]->azimuth / 90.f; */
+#ifdef FIX_BASOP_2023_TDREND_DISTATT_PRECISION
+                Pos_fx[1] = L_shl( Mpy_32_32_r( hIsmMetaData[nS]->azimuth_fx, 23860929 /* 1 / 90.f in Q31 */ ), 0 ); /* Q22 */
+#else
                 Pos_fx[1] = L_shl( Mpy_32_32_r( hIsmMetaData[nS]->azimuth_fx, 23860929 /* 1 / 90.f in Q31 */ ), Q3 ); /* Q25 */
+#endif
                 move32();
                 Pos_fx[2] = 0;
                 move32();
@@ -983,7 +1012,11 @@ ivas_error ivas_td_binaural_renderer_ext_fx(
     {
         Word16 idx = subframe_idx;
         move16();
+#ifdef FIX_BASOP_2023_TDREND_DISTATT_PRECISION
+        Word16 pos_q = Q22;
+#else
         Word16 pos_q = Q25;
+#endif
         move16();
 
         test();
diff --git a/lib_rend/ivas_objectRenderer_hrFilt_fx.c b/lib_rend/ivas_objectRenderer_hrFilt_fx.c
index 7b2ebf908717859de29f68e4ee35eb1bfbe20b7b..88be20e0c9a43595b6799c043911a0039a4b5e56 100644
--- a/lib_rend/ivas_objectRenderer_hrFilt_fx.c
+++ b/lib_rend/ivas_objectRenderer_hrFilt_fx.c
@@ -38,7 +38,7 @@
 #include "ivas_rom_rend.h"
 #include "ivas_cnst.h"
 #include "wmc_auto.h"
-
+#include "debug.h"
 
 /*---------------------------------------------------------------------*
  * Local function prototypes
diff --git a/lib_rend/ivas_objectRenderer_mix_fx.c b/lib_rend/ivas_objectRenderer_mix_fx.c
index 598308fd4dd355706e29d1084f972522c898de9d..c895b196779c5c2fa592023a7fba9dfe77d32788 100644
--- a/lib_rend/ivas_objectRenderer_mix_fx.c
+++ b/lib_rend/ivas_objectRenderer_mix_fx.c
@@ -198,7 +198,11 @@ ivas_error TDREND_MIX_Init_fx(
     }
     /* Init virtual and rendering listeners for spatial mixers */
     TDREND_SPATIAL_VecInit_fx( hBinRendererTd->Listener_p->Pos_fx, 0, 0, 0 );
+#ifdef FIX_BASOP_2023_TDREND_DISTATT_PRECISION
+    hBinRendererTd->Listener_p->Pos_q = Q22;
+#else
     hBinRendererTd->Listener_p->Pos_q = Q25;
+#endif
     move16();
     TDREND_SPATIAL_VecInit_fx( hBinRendererTd->Listener_p->Vel_fx, 0, 0, 0 );
     TDREND_SPATIAL_VecInit_fx( hBinRendererTd->Listener_p->Front_fx, 0, 0, -ONE_IN_Q30 );
diff --git a/lib_rend/ivas_objectRenderer_sources_fx.c b/lib_rend/ivas_objectRenderer_sources_fx.c
index ad4776fbcb57c09b8a4b679bd4b04cdffa96c0f7..4f0ccb8cfceb906e555e01152bc8f0ef6ddaaf42 100644
--- a/lib_rend/ivas_objectRenderer_sources_fx.c
+++ b/lib_rend/ivas_objectRenderer_sources_fx.c
@@ -61,7 +61,11 @@ static void TDREND_SRC_SPATIAL_Dealloc( TDREND_SRC_SPATIAL_t *SrcSpatial_p );
 ivas_error TDREND_MIX_SRC_SetPos_fx(
     BINAURAL_TD_OBJECT_RENDERER_HANDLE hBinRendererTd, /* i/o: TD renderer handle  */
     const Word16 SrcInd,                               /* i  : Source index        */
-    const Word32 *Vec_p                                /* i  : Position vector Q25 */
+#ifdef FIX_BASOP_2023_TDREND_DISTATT_PRECISION
+    const Word32 *Vec_p /* i  : Position vector Q22 */
+#else
+    const Word32 *Vec_p /* i  : Position vector Q25 */
+#endif
 )
 {
     TDREND_SRC_SPATIAL_t *SrcSpatial_p;
@@ -73,6 +77,15 @@ ivas_error TDREND_MIX_SRC_SetPos_fx(
     ELSE
     {
         SrcSpatial_p = hBinRendererTd->Sources[SrcInd]->SrcSpatial_p;
+#ifdef FIX_BASOP_2023_TDREND_DISTATT_PRECISION
+        SrcSpatial_p->Pos_p_fx[0] = L_shr( SrcSpatial_p->Pos_p_fx[0], sub( SrcSpatial_p->q_Pos_p, Q22 ) ); // Q22
+        move32();
+        SrcSpatial_p->Pos_p_fx[1] = L_shr( SrcSpatial_p->Pos_p_fx[1], sub( SrcSpatial_p->q_Pos_p, Q22 ) ); // Q22
+        move32();
+        SrcSpatial_p->Pos_p_fx[2] = L_shr( SrcSpatial_p->Pos_p_fx[2], sub( SrcSpatial_p->q_Pos_p, Q22 ) ); // Q22
+        move32();
+        SrcSpatial_p->q_Pos_p = Q22;
+#else
         SrcSpatial_p->Pos_p_fx[0] = L_shr( SrcSpatial_p->Pos_p_fx[0], sub( SrcSpatial_p->q_Pos_p, Q25 ) ); // Q25
         move32();
         SrcSpatial_p->Pos_p_fx[1] = L_shr( SrcSpatial_p->Pos_p_fx[1], sub( SrcSpatial_p->q_Pos_p, Q25 ) ); // Q25
@@ -80,12 +93,17 @@ ivas_error TDREND_MIX_SRC_SetPos_fx(
         SrcSpatial_p->Pos_p_fx[2] = L_shr( SrcSpatial_p->Pos_p_fx[2], sub( SrcSpatial_p->q_Pos_p, Q25 ) ); // Q25
         move32();
         SrcSpatial_p->q_Pos_p = Q25;
+#endif
         move16();
         test();
         test();
         IF( NE_32( SrcSpatial_p->Pos_p_fx[0], Vec_p[0] ) || NE_32( SrcSpatial_p->Pos_p_fx[1], Vec_p[1] ) || NE_32( SrcSpatial_p->Pos_p_fx[2], Vec_p[2] ) )
         {
+#ifdef FIX_BASOP_2023_TDREND_DISTATT_PRECISION
+            Copy32( Vec_p, SrcSpatial_p->Pos_p_fx, 3 ); // Q22
+#else
             Copy32( Vec_p, SrcSpatial_p->Pos_p_fx, 3 ); // Q25
+#endif
             SrcSpatial_p->Updated = TRUE;
             move16();
         }
@@ -324,6 +342,9 @@ void TDREND_SRC_REND_UpdateFiltersFromSpatialParams_fx(
     Word32 azim_delta;
     Word32 elev_delta;
     Word16 ListRelPos_e, ListRelDist_e;
+#ifdef FIX_BASOP_2023_TDREND_DISTATT_PRECISION
+    Word32 Pos_p_q21[3], Lis_p_q21[3];
+#endif
 
     /* Evaluate the HR filters from the source and listener positions and orientations */
     Listener_p = hBinRendererTd->Listener_p;
@@ -335,8 +356,17 @@ void TDREND_SRC_REND_UpdateFiltersFromSpatialParams_fx(
     {
 
         /* Absolute position */
+#ifdef FIX_BASOP_2023_TDREND_DISTATT_PRECISION
+        /* Q22 -> Q21 for 1 bit headroom. Relative position has twice the range of the position */
+        Copy_Scale_sig32( SrcSpatial_p->Pos_p_fx, Pos_p_q21, 3, -1 );
+        Copy_Scale_sig32( Listener_p->Pos_fx, Lis_p_q21, 3, -1 );
+        TDREND_SPATIAL_VecMapToNewCoordSystem_fx( Pos_p_q21, Lis_p_q21, Listener_p->Front_fx, Listener_p->Up_fx, Listener_p->Right_fx, ListRelPos, ListRelPosAbs );
+        ListRelPos_e = 11; // Q21 + Q30 - 31 = Q20, exp = 31 - 20 = 11
+#else
         TDREND_SPATIAL_VecMapToNewCoordSystem_fx( SrcSpatial_p->Pos_p_fx, Listener_p->Pos_fx, Listener_p->Front_fx, Listener_p->Up_fx, Listener_p->Right_fx, ListRelPos, ListRelPosAbs );
         ListRelPos_e = 7; // output q of above function is Q25 + Q30 - 31. so exp will be 62 - Q25 - Q30.
+#endif
+
         move16();
         ListRelDist = TDREND_SPATIAL_VecNorm_fx( ListRelPos, ListRelPos_e, &ListRelDist_e );
 
@@ -375,7 +405,11 @@ void TDREND_SRC_REND_UpdateFiltersFromSpatialParams_fx(
         move16();
         IF( SrcSpatial_p->DirAttenEnabled )
         {
+#ifdef FIX_BASOP_2023_TDREND_DISTATT_PRECISION
+            *SrcRend_p->DirGain_p_fx = TDREND_SRC_SPATIAL_GetDirGain_fx( &SrcSpatial_p->DirAtten, SrcSpatial_p->Front_p_fx, ListRelPosAbs, 9 /*exp: 31 - 22 = 9 */ );
+#else
             *SrcRend_p->DirGain_p_fx = TDREND_SRC_SPATIAL_GetDirGain_fx( &SrcSpatial_p->DirAtten, SrcSpatial_p->Front_p_fx, ListRelPosAbs, 6 );
+#endif
         }
 
         /* Distance gain */
@@ -458,6 +492,15 @@ void TDREND_SRC_REND_UpdateFiltersFromSpatialParams_fx(
         move32();
         set32_fx( hrf_left, 0, *filterlength );
         set32_fx( hrf_right, 0, *filterlength );
+#ifdef FIX_BASOP_2023_TDREND_DISTATT_PRECISION
+        hrf_left[0] = L_shr( L_add( SrcSpatial_p->Pos_p_fx[1], ONE_IN_Q22 ), 1 ); // Q22
+        move32();
+        hrf_right[0] = L_sub( ONE_IN_Q22, hrf_left[0] ); // Q22
+        move32();
+        hrf_left_e = 9;
+        move16();
+        hrf_right_e = 9;
+#else
         hrf_left[0] = L_shr( L_add( SrcSpatial_p->Pos_p_fx[1], ONE_IN_Q25 ), 1 ); // Q25
         move32();
         hrf_right[0] = L_sub( ONE_IN_Q25, hrf_left[0] ); // Q25
@@ -465,6 +508,7 @@ void TDREND_SRC_REND_UpdateFiltersFromSpatialParams_fx(
         hrf_left_e = 6;
         move16();
         hrf_right_e = 6;
+#endif
         move16();
         *intp_count = MAX_INTERPOLATION_STEPS; // Q22
         move16();
@@ -628,12 +672,21 @@ static void TDREND_SRC_SPATIAL_Init_fx(
     move16();
     SrcSpatial_p->DistAtten.DistAttenModel = TDREND_DIST_ATTEN_MODEL_INV_DIST_CLAMPED; // Q0
     move16();
+#ifdef FIX_BASOP_2023_TDREND_DISTATT_PRECISION
+    SrcSpatial_p->DistAtten.RefDist_fx = ONE_IN_Q28; // Q28
+    move32();
+    SrcSpatial_p->DistAtten.MaxDist_fx = 528482304; /* Maximum radius (2^ISM_RADIUS_NBITS-1)*0.25 */ /*15.75 in Q25*/
+    move32();
+    SrcSpatial_p->DistAtten.RollOffFactor_fx = ONE_IN_Q28; // Q28
+    move32();
+#else
     SrcSpatial_p->DistAtten.RefDist_fx = ONE_IN_Q30; // Q30
     move32();
     SrcSpatial_p->DistAtten.MaxDist_fx = 2113929216; /* Maximum radius (2^ISM_RADIUS_NBITS-1)*0.25 */ /*15.75 in Q27*/
     move32();
     SrcSpatial_p->DistAtten.RollOffFactor_fx = ONE_IN_Q30; // Q30
     move16();
+#endif
 
     return;
 }
@@ -832,28 +885,56 @@ static Word16 TDREND_SRC_SPATIAL_GetDistGain_fx(
             BREAK;
 
         case TDREND_DIST_ATTEN_MODEL_INV_DIST_CLAMPED:
+#ifdef FIX_BASOP_2023_TDREND_DISTATT_PRECISION
+            flag = BASOP_Util_Cmp_Mant32Exp( Dist2_fx, Dist2_e, DistAtten_p->RefDist_fx, 3 );
+#else
             flag = BASOP_Util_Cmp_Mant32Exp( Dist2_fx, Dist2_e, DistAtten_p->RefDist_fx, 1 );
+#endif
             IF( flag < 0 )
             {
+#ifdef FIX_BASOP_2023_TDREND_DISTATT_PRECISION
+                Dist2_fx = DistAtten_p->RefDist_fx; // Q28
+                move32();
+                Dist2_e = 3;
+                move16();
+#else
                 Dist2_fx = DistAtten_p->RefDist_fx; // Q30
                 move32();
                 Dist2_e = 1;
                 move16();
+#endif
             }
+#ifdef FIX_BASOP_2023_TDREND_DISTATT_PRECISION
+            flag = BASOP_Util_Cmp_Mant32Exp( Dist2_fx, Dist2_e, DistAtten_p->MaxDist_fx, 6 );
+#else
             flag = BASOP_Util_Cmp_Mant32Exp( Dist2_fx, Dist2_e, DistAtten_p->MaxDist_fx, 4 );
+#endif
             IF( flag > 0 )
             {
+#ifdef FIX_BASOP_2023_TDREND_DISTATT_PRECISION
+                Dist2_fx = DistAtten_p->MaxDist_fx; // Q25
+                move32();
+                Dist2_e = 6;
+                move16();
+#else
                 Dist2_fx = DistAtten_p->MaxDist_fx; // Q27
                 move32();
                 Dist2_e = 4;
                 move16();
+#endif
             }
             /* DistGain = powf( DistAtten_p->RefDist / Dist2, DistAtten_p->RollOffFactor ); */
+#ifdef FIX_BASOP_2023_TDREND_DISTATT_PRECISION
+            tmp16 = BASOP_Util_Divide3232_Scale( DistAtten_p->RefDist_fx, Dist2_fx, &Dist_s ); /* tmp16 is Q(15 - Dist_s + Dist2_e - 3) */
+            tmp32 = L_deposit_h( tmp16 );                                                      /* tmp32 is Q(31 - Dist_s + Dist2_e - 3) */
+            /* tmp32 exponent: 31 - (31 - Dist_s + Dist2_e - 3) = Dist_s - Dist2_e + 3, RollOffFactor_fx exponent: 31 - 28 = 3 */
+            tmp32 = BASOP_Util_fPow( tmp32, add( sub( Dist_s, Dist2_e ), 3 ), DistAtten_p->RollOffFactor_fx, 3, &tmp_e ); /* Q(31 - tmp_e) */
+#else
             tmp16 = BASOP_Util_Divide3232_Scale( DistAtten_p->RefDist_fx, Dist2_fx, &Dist_s ); /* tmp16 is Q(15 - Dist_s + Dist2_e - 1) */
             tmp32 = L_deposit_h( tmp16 );                                                      /* tmp32 is Q(31 - Dist_s + Dist2_e - 1) */
             /* tmp32 exponent: 31 - (31 - Dist_s + Dist2_e - 1) = Dist_s - Dist2_e + 1, RollOffFactor_fx exponent: 31 - 30 = 1 */
             tmp32 = BASOP_Util_fPow( tmp32, add( sub( Dist_s, Dist2_e ), 1 ), DistAtten_p->RollOffFactor_fx, 1, &tmp_e ); /* Q(31 - tmp_e) */
-
+#endif
             BREAK;
     }
 
diff --git a/lib_rend/ivas_render_config_fx.c b/lib_rend/ivas_render_config_fx.c
index 81f66bf60af8e61e1eac8098d2204cde18c0265f..87192a4f6d310a236122db947d0306a90b3a1c43 100644
--- a/lib_rend/ivas_render_config_fx.c
+++ b/lib_rend/ivas_render_config_fx.c
@@ -140,12 +140,21 @@ ivas_error ivas_render_config_init_from_rom_fx(
         ( *hRenderConfig )->directivity_fx[add( i_mult( i, 3 ), 2 )] = 32767 /*1.0f in Q15*/; /* Back attenuation */
         move16();
     }
+#ifdef FIX_BASOP_2023_TDREND_DISTATT_PRECISION
+    ( *hRenderConfig )->distAtt_fx[0] = 528482304; /* Maximum radius (2^ISM_RADIUS_NBITS-1)*0.25 */ /*15.75 in Q25*/ /* Default max dist */
+    move32();
+    ( *hRenderConfig )->distAtt_fx[1] = ONE_IN_Q28; // Q28   /* Default ref dist */
+    move32();
+    ( *hRenderConfig )->distAtt_fx[2] = ONE_IN_Q28; // Q28   /* Default rolloff factor */
+    move32();
+#else
     ( *hRenderConfig )->distAtt_fx[0] = 2113929216; /* Maximum radius (2^ISM_RADIUS_NBITS-1)*0.25 */ /*15.75 in Q27*/ /* Default max dist */
     move32();
     ( *hRenderConfig )->distAtt_fx[1] = ONE_IN_Q30; // Q30   /* Default ref dist */
     move32();
     ( *hRenderConfig )->distAtt_fx[2] = ONE_IN_Q30; // Q30   /* Default rolloff factor */
     move32();
+#endif
     ( *hRenderConfig )->split_rend_config.splitRendBitRate = ISAR_MAX_SPLIT_REND_BITRATE;
     move32();
     ( *hRenderConfig )->split_rend_config.dof = 3;
diff --git a/lib_rend/ivas_stat_rend.h b/lib_rend/ivas_stat_rend.h
index dc5db5e4fa92a98e80a6fb0a14271e2f9cef5490..f2d1e48752a602c791f578849e517b743aec9212 100644
--- a/lib_rend/ivas_stat_rend.h
+++ b/lib_rend/ivas_stat_rend.h
@@ -1178,9 +1178,15 @@ typedef struct ivas_hrtf_TDREND_HRFILT_FiltSet_struct
 typedef struct
 {
     TDREND_DistAttenModel_t DistAttenModel;
+#ifdef FIX_BASOP_2023_TDREND_DISTATT_PRECISION
+    Word32 RefDist_fx;       /* Q28 */
+    Word32 MaxDist_fx;       /* Q25 */
+    Word32 RollOffFactor_fx; /* Q28 */
+#else
     Word32 RefDist_fx;       /* Q30 */
     Word32 MaxDist_fx;       /* Q27 */
     Word32 RollOffFactor_fx; /* Q30 */
+#endif
 
 } TDREND_DistAtten_t;
 
@@ -1218,7 +1224,11 @@ typedef struct
 {
     Word16 Updated;
     TDREND_PosType_t PosType;
+#ifdef FIX_BASOP_2023_TDREND_DISTATT_PRECISION
+    Word32 Pos_p_fx[3 * SPAT_BIN_MAX_INPUT_CHANNELS]; // Q22
+#else
     Word32 Pos_p_fx[3 * SPAT_BIN_MAX_INPUT_CHANNELS]; // Q25
+#endif
     Word16 q_Pos_p;
     Word32 Front_p_fx[3 * SPAT_BIN_MAX_INPUT_CHANNELS]; // Q30
     Word16 DirAttenEnabled;
diff --git a/lib_util/render_config_reader.c b/lib_util/render_config_reader.c
index 318072fe8566da06ff6755c612e8f231b09868ed..4a313b6c26ba2370ee14847b532701e9bad1443a 100644
--- a/lib_util/render_config_reader.c
+++ b/lib_util/render_config_reader.c
@@ -80,6 +80,20 @@
 #define IVAS_ER_LIST_ORIGIN_X_FX 0
 #define IVAS_ER_LIST_ORIGIN_Y_FX 0
 
+#ifdef FIX_BASOP_2023_TDREND_DISTATT_PRECISION
+#define DIST_ATT_MAX_MAXDIST 63.0f
+#define DIST_ATT_MAX_REFDIST 6.3f
+#define DIST_ATT_MAX_ROLLOFF 4.0f
+
+#ifndef min
+#define min( x, y ) ( ( x ) < ( y ) ? ( x ) : ( y ) )
+#endif
+
+#ifndef max
+#define max( x, y ) ( ( x ) > ( y ) ? ( x ) : ( y ) )
+#endif
+#endif
+
 #ifndef TRUE
 #define TRUE 1
 #endif
@@ -143,7 +157,11 @@ struct RenderConfigReader
     AcousticEnv *pAE;     /* Acoustic environments */
     uint32_t nDP;         /* Number of directivity patterns */
     DirectrivityPat *pDP; /* Directivity Pattern */
-    float distAtt[3];     /* [MaxDist Q30, RefDist Q30, Rolloff Q30] */
+#ifdef FIX_BASOP_2023_TDREND_DISTATT_PRECISION
+    float distAtt[3]; /* [MaxDist Q25, RefDist Q28, Rolloff Q28] */
+#else
+    float distAtt[3]; /* [MaxDist Q30, RefDist Q30, Rolloff Q30] */
+#endif
 };
 
 
@@ -3094,6 +3112,14 @@ ivas_error RenderConfigReader_getDirectivity(
     /* Convert to Word16 */
     FOR( n = 0; n < 4; n++ )
     {
+#ifdef FIX_BASOP_2023_TDREND_DISTATT_PRECISION
+        /* Verify range of directivity patterns */
+        /* Range needs to be checked before converting to fixed point -- different from float */
+        directivity[n * 3] = max( 0.0f, min( 360.0f, directivity[n * 3] ) );
+        directivity[n * 3 + 1] = max( 0.0f, min( 360.0f, directivity[n * 3 + 1] ) );
+        directivity[n * 3 + 2] = max( 0.0f, min( 1.0f, directivity[n * 3 + 2] ) );
+#endif
+
         directivity_fx[n * 3] = (Word16) ( directivity[n * 3] * ( 1u << 6 ) );
         directivity_fx[n * 3 + 1] = (Word16) ( directivity[n * 3 + 1] * ( 1u << 6 ) );
         directivity_fx[n * 3 + 2] = (Word16) ( directivity[n * 3 + 2] * ( ( 1u << 15 ) - 1 ) );
@@ -3131,9 +3157,23 @@ ivas_error RenderConfigReader_getDistanceAttenuation(
     }
 
     /* Convert to Word32 */
+#ifdef FIX_BASOP_2023_TDREND_DISTATT_PRECISION
+    /* Range needs to be checked before converting to fixed point -- different from float */
+    /* Verify range of distance attenuation parameters: refDist:       0.0 <= distAtt[1] <= 6.3         */
+    /*                                                  maxDist:       distAtt[1] <= distAtt[0] <= 63.0 */
+    /*                                                  rollOffFactor: 0 <= distAtt[2] <= 4.0           */
+    distAtt[1] = min( max( 0, distAtt[1] ), DIST_ATT_MAX_REFDIST );
+    distAtt[0] = min( max( distAtt[1], distAtt[0] ), DIST_ATT_MAX_MAXDIST );
+    distAtt[2] = min( max( 0.0f, distAtt[2] ), DIST_ATT_MAX_ROLLOFF );
+
+    distAtt_fx[0] = (Word32) ( distAtt[0] * ( 1u << 25 ) );
+    distAtt_fx[1] = (Word32) ( distAtt[1] * ( 1u << 28 ) );
+    distAtt_fx[2] = (Word32) ( distAtt[2] * ( 1u << 28 ) );
+#else
     distAtt_fx[0] = (Word32) ( distAtt[0] * ( 1u << 27 ) );
     distAtt_fx[1] = (Word32) ( distAtt[1] * ( 1u << 30 ) );
     distAtt_fx[2] = (Word32) ( distAtt[2] * ( 1u << 30 ) );
+#endif
 
     return IVAS_ERR_OK;
 }
diff --git a/lib_util/rotation_file_reader.c b/lib_util/rotation_file_reader.c
index 5530371b090f41232163ea275c94296668c4c540..2652fde9172540a6c809531aa8530ca3765cb878 100644
--- a/lib_util/rotation_file_reader.c
+++ b/lib_util/rotation_file_reader.c
@@ -41,6 +41,17 @@
 #define Q29 29
 #define Q31 31
 
+#ifdef FIX_BASOP_2023_TDREND_DISTATT_PRECISION
+#ifndef min
+#define min( x, y ) ( ( x ) < ( y ) ? ( x ) : ( y ) )
+#endif
+
+#ifndef max
+#define max( x, y ) ( ( x ) > ( y ) ? ( x ) : ( y ) )
+#endif
+#endif
+
+
 struct RotFileReader
 {
     FILE *trajFile;
@@ -144,6 +155,15 @@ ivas_error HeadRotationFileReading(
 
     if ( pPos != NULL )
     {
+#ifdef FIX_BASOP_2023_TDREND_DISTATT_PRECISION
+        pPos->x = min( max( -IVAS_LISTENER_POSITION_MAX, posx ), IVAS_LISTENER_POSITION_MAX );
+        pPos->y = min( max( -IVAS_LISTENER_POSITION_MAX, posy ), IVAS_LISTENER_POSITION_MAX );
+        pPos->z = min( max( -IVAS_LISTENER_POSITION_MAX, posz ), IVAS_LISTENER_POSITION_MAX );
+        pPos->x_fx = floatToFixed_32( pPos->x, Q22 );
+        pPos->y_fx = floatToFixed_32( pPos->y, Q22 );
+        pPos->z_fx = floatToFixed_32( pPos->z, Q22 );
+        pPos->q_fact = Q22;
+#else
         pPos->x = posx;
         pPos->y = posy;
         pPos->z = posz;
@@ -151,6 +171,7 @@ ivas_error HeadRotationFileReading(
         pPos->y_fx = floatToFixed_32( posy, Q25 );
         pPos->z_fx = floatToFixed_32( posz, Q25 );
         pPos->q_fact = Q25;
+#endif
     }
 
     return IVAS_ERR_OK;