diff --git a/src/btstack_lc3.c b/src/btstack_lc3.c
index e237c5186..aa222ebb6 100644
--- a/src/btstack_lc3.c
+++ b/src/btstack_lc3.c
@@ -53,7 +53,6 @@ uint16_t btstack_lc3_frame_duration_in_us(btstack_lc3_frame_duration_t frame_dur
         case BTSTACK_LC3_FRAME_DURATION_10000US:
             return 10000;
         default:
-            btstack_assert(false);
             return 0;
     }
 }
diff --git a/src/btstack_lc3.h b/src/btstack_lc3.h
index 574d32425..07b8fddeb 100644
--- a/src/btstack_lc3.h
+++ b/src/btstack_lc3.h
@@ -64,21 +64,6 @@ typedef struct {
      */
     uint8_t (*configure)(void * context, uint32_t sample_rate, btstack_lc3_frame_duration_t frame_duration, uint16_t octets_per_frame);
 
-    /**
-     * Get number of octets per LC3 frame for bitrate
-     * @param context
-     * @param bitrate
-     * @return octets_per_frame
-     */
-    uint16_t (*get_number_octets_for_bitrate)(void * context, uint32_t bitrate);
-
-    /**
-     * Get number of samples per LC3 frame
-     * @param context
-     * @return number of samples
-     */
-    uint16_t (*get_number_samples_per_frame)(void * context);
-
     /**
      * Decode LC3 Frame into signed 16-bit samples
      * @param context
@@ -118,21 +103,6 @@ typedef struct {
      */
     uint8_t (*configure)(void * context, uint32_t sample_rate, btstack_lc3_frame_duration_t frame_duration, uint16_t octets_per_frame);
 
-    /**
-     * Get bitrate from number of octets per LC3 frame
-     * @param context
-     * @param number_of_octets
-     * @return bitrate
-     */
-    uint32_t (*get_bitrate_for_number_of_octets)(void * context, uint16_t number_of_octets);
-
-    /**
-     * Get number of samples per LC3 frame
-     * @param context
-    * @return number of samples
-    */
-    uint16_t (*get_number_samples_per_frame)(void * context);
-
     /**
      * Encode LC3 Frame with 16-bit signed PCM samples
      * @param context
@@ -158,7 +128,7 @@ typedef struct {
 /**
  * @brief Map enum to ISO Interval in us
  * @param frame_duration enum
- * @return frame_duratoin in us
+ * @return frame_duratoin in us or 0 for invalid frame_duration enum
  */
 uint16_t btstack_lc3_frame_duration_in_us(btstack_lc3_frame_duration_t frame_duration);
 
diff --git a/src/btstack_lc3_google.c b/src/btstack_lc3_google.c
index 521508335..e88591257 100644
--- a/src/btstack_lc3_google.c
+++ b/src/btstack_lc3_google.c
@@ -79,24 +79,6 @@ static uint8_t lc3_decoder_google_configure(void * context, uint32_t sample_rate
     return ERROR_CODE_SUCCESS;
 }
 
-static uint16_t lc3_decoder_google_get_number_octets_for_bitrate(void * context, uint32_t bitrate){
-    btstack_lc3_decoder_google_t * instance = (btstack_lc3_decoder_google_t *) context;
-    uint16_t duration_us = lc3_frame_duration_in_us(instance->frame_duration);
-    if (duration_us == 0){
-        return 0;
-    }
-    return lc3_frame_bytes(duration_us, bitrate);
-}
-
-static uint16_t lc3_decoder_google_get_number_samples_per_frame(void * context){
-    btstack_lc3_decoder_google_t * instance = (btstack_lc3_decoder_google_t *) context;
-    uint16_t duration_us = lc3_frame_duration_in_us(instance->frame_duration);
-    if (duration_us == 0){
-        return 0;
-    }
-    return lc3_frame_samples(duration_us, instance->sample_rate);
-}
-
 static uint8_t
 lc3_decoder_google_decode(void *context, const uint8_t *bytes, uint8_t BFI, enum lc3_pcm_format fmt, void *pcm_out,
                           uint16_t stride, uint8_t *BEC_detect) {
@@ -133,8 +115,6 @@ static uint8_t lc3_decoder_google_decode_signed_24(void * context, const uint8_t
 
 static const btstack_lc3_decoder_t btstack_l3c_decoder_google_instance = {
     lc3_decoder_google_configure,
-    lc3_decoder_google_get_number_octets_for_bitrate,
-    lc3_decoder_google_get_number_samples_per_frame,
     lc3_decoder_google_decode_signed_16,
     lc3_decoder_google_decode_signed_24
 };
@@ -170,25 +150,6 @@ static uint8_t lc3_encoder_google_configure(void * context, uint32_t sample_rate
     return ERROR_CODE_SUCCESS;
 }
 
-static uint32_t lc3_encoder_google_get_bitrate_for_number_of_octets(void * context, uint16_t number_of_octets){
-    btstack_lc3_encoder_google_t * instance = (btstack_lc3_encoder_google_t *) context;
-    // map frame duration
-    uint16_t duration_us = lc3_frame_duration_in_us(instance->frame_duration);
-    if (duration_us == 0){
-        return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS;
-    }
-    return lc3_resolve_bitrate(duration_us, number_of_octets);
-}
-
-static uint16_t lc3_encoder_google_get_number_samples_per_frame(void * context){
-    btstack_lc3_encoder_google_t * instance = (btstack_lc3_encoder_google_t *) context;
-    // map frame duration
-    uint16_t duration_us = lc3_frame_duration_in_us(instance->frame_duration);
-    if (duration_us == 0){
-        return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS;
-    }
-    return lc3_frame_samples(duration_us, instance->sample_rate);
-}
 static uint8_t
 lc3_encoder_google_encode_signed(void *context, enum lc3_pcm_format fmt, const void *pcm_in, uint16_t stride, uint8_t *bytes) {
     btstack_lc3_encoder_google_t * instance = (btstack_lc3_encoder_google_t *) context;
@@ -211,8 +172,6 @@ static uint8_t lc3_encoder_google_encode_signed_24(void * context, const int32_t
 
 static const btstack_lc3_encoder_t btstack_l3c_encoder_google_instance = {
         lc3_encoder_google_configure,
-        lc3_encoder_google_get_bitrate_for_number_of_octets,
-        lc3_encoder_google_get_number_samples_per_frame,
         lc3_encoder_google_encode_signed_16,
         lc3_encoder_google_encode_signed_24
 };
diff --git a/test/le_audio/btstack_lc3plus_fraunhofer.c b/test/le_audio/btstack_lc3plus_fraunhofer.c
index f2c743914..215bb3b03 100644
--- a/test/le_audio/btstack_lc3plus_fraunhofer.c
+++ b/test/le_audio/btstack_lc3plus_fraunhofer.c
@@ -84,17 +84,6 @@ static uint8_t lc3plus_fraunhofer_decoder_configure(void * context, uint32_t sam
     return ERROR_CODE_SUCCESS;
 }
 
-static uint16_t lc3plus_fraunhofer_decoder_get_number_octets_for_bitrate(void * context, uint32_t bitrate){
-    btstack_assert(false);
-    return 0;
-}
-
-static uint16_t lc3plus_fraunhofer_decoder_get_number_samples_per_frame(void * context){
-    btstack_lc3plus_fraunhofer_decoder_t * instance = (btstack_lc3plus_fraunhofer_decoder_t *) context;
-    LC3PLUS_Dec * decoder = (LC3PLUS_Dec*) instance->decoder;
-    return lc3plus_dec_get_output_samples(decoder);
-}
-
 static uint8_t lc3plus_fraunhofer_decoder_decode_signed_16(void * context, const uint8_t *bytes, uint8_t BFI, int16_t* pcm_out, uint16_t stride, uint8_t * BEC_detect){
     btstack_lc3plus_fraunhofer_decoder_t * instance = (btstack_lc3plus_fraunhofer_decoder_t *) context;
     LC3PLUS_Dec * decoder = (LC3PLUS_Dec*) instance->decoder;
@@ -157,8 +146,6 @@ static uint8_t lc3plus_fraunhofer_decoder_decode_signed_24(void * context, const
 
 static const btstack_lc3_decoder_t btstack_l3cplus_fraunhofer_decoder_instance = {
         lc3plus_fraunhofer_decoder_configure,
-        lc3plus_fraunhofer_decoder_get_number_octets_for_bitrate,
-        lc3plus_fraunhofer_decoder_get_number_samples_per_frame,
         lc3plus_fraunhofer_decoder_decode_signed_16,
         lc3plus_fraunhofer_decoder_decode_signed_24
 };
@@ -175,16 +162,6 @@ static uint8_t lc3plus_fraunhofer_encoder_configure(void * context, uint32_t sam
     return ERROR_CODE_COMMAND_DISALLOWED;
 }
 
-static uint32_t lc3plus_fraunhofer_encoder_get_bitrate_for_number_of_octets(void * context, uint16_t number_of_octets){
-    btstack_assert(false);
-    return 0;
-}
-
-static uint16_t lc3plus_fraunhofer_encoder_get_number_samples_per_frame(void * context){
-    btstack_assert(false);
-    return 0;
-}
-
 static uint8_t lc3plus_fraunhofer_encoder_encode_signed_16(void * context, const int16_t* pcm_in, uint16_t stride, uint8_t *bytes){
     return ERROR_CODE_COMMAND_DISALLOWED;
 }
@@ -195,8 +172,6 @@ static uint8_t lc3plus_fraunhofer_encoder_encode_signed_24(void * context, const
 
 static const btstack_lc3_encoder_t btstack_l3cplus_fraunhofer_encoder_instance = {
         lc3plus_fraunhofer_encoder_configure,
-        lc3plus_fraunhofer_encoder_get_bitrate_for_number_of_octets,
-        lc3plus_fraunhofer_encoder_get_number_samples_per_frame,
         lc3plus_fraunhofer_encoder_encode_signed_16,
         lc3plus_fraunhofer_encoder_encode_signed_24
 };
diff --git a/test/le_audio/lc3_test.c b/test/le_audio/lc3_test.c
index 809df6567..1bbbaebd8 100644
--- a/test/le_audio/lc3_test.c
+++ b/test/le_audio/lc3_test.c
@@ -234,7 +234,7 @@ static void setup_lc3_encoder(void){
         lc3_encoder = btstack_lc3_encoder_google_init_instance(context);
         lc3_encoder->configure(context, sampling_frequency_hz, frame_duration, octets_per_frame);
     }
-    number_samples_per_frame = lc3_encoder->get_number_samples_per_frame(&encoder_contexts[0]);
+    number_samples_per_frame = btstack_lc3_samples_per_frame(sampling_frequency_hz, frame_duration);
     btstack_assert(number_samples_per_frame <= MAX_SAMPLES_PER_FRAME);
     printf("LC3 Encoder config: %u hz, frame duration %s ms, num samples %u, num octets %u\n",
            sampling_frequency_hz, frame_duration == BTSTACK_LC3_FRAME_DURATION_7500US ? "7.5" : "10",
@@ -260,7 +260,7 @@ static void setup_lc3_decoder(void){
             decoder_contexts[channel] = decoder_context;
             lc3_decoder->configure(decoder_context, sampling_frequency_hz, frame_duration, octets_per_frame);
         }
-    number_samples_per_frame = lc3_decoder->get_number_samples_per_frame(decoder_contexts[0]);
+    number_samples_per_frame = btstack_lc3_samples_per_frame(sampling_frequency_hz, frame_duration);
     btstack_assert(number_samples_per_frame <= MAX_SAMPLES_PER_FRAME);
 }
 
diff --git a/test/le_audio/le_audio_broadcast_sink.c b/test/le_audio/le_audio_broadcast_sink.c
index 2bb7e9a67..dd081b2e2 100644
--- a/test/le_audio/le_audio_broadcast_sink.c
+++ b/test/le_audio/le_audio_broadcast_sink.c
@@ -223,7 +223,7 @@ static void setup_lc3_decoder(void){
         decoder_contexts[channel] = decoder_context;
         lc3_decoder->configure(decoder_context, sampling_frequency_hz, frame_duration, octets_per_frame);
     }
-    number_samples_per_frame = lc3_decoder->get_number_samples_per_frame(decoder_contexts[0]);
+    number_samples_per_frame = btstack_lc3_samples_per_frame(sampling_frequency_hz, frame_duration);
     btstack_assert(number_samples_per_frame <= MAX_SAMPLES_PER_FRAME);
 }
 
diff --git a/test/le_audio/le_audio_broadcast_source.c b/test/le_audio/le_audio_broadcast_source.c
index c9ea5157a..3975423d1 100644
--- a/test/le_audio/le_audio_broadcast_source.c
+++ b/test/le_audio/le_audio_broadcast_source.c
@@ -348,7 +348,7 @@ static void setup_lc3_encoder(void){
         lc3_encoder = btstack_lc3_encoder_google_init_instance(context);
         lc3_encoder->configure(context, sampling_frequency_hz, frame_duration, octets_per_frame);
     }
-    number_samples_per_frame = lc3_encoder->get_number_samples_per_frame(&encoder_contexts[0]);
+    number_samples_per_frame = btstack_lc3_samples_per_frame(sampling_frequency_hz, frame_duration);
     btstack_assert(number_samples_per_frame <= MAX_SAMPLES_PER_FRAME);
     printf("LC3 Encoder config: %u hz, frame duration %s ms, num samples %u, num octets %u\n",
            sampling_frequency_hz, frame_duration == BTSTACK_LC3_FRAME_DURATION_7500US ? "7.5" : "10",
diff --git a/test/le_audio/le_audio_unicast_sink.c b/test/le_audio/le_audio_unicast_sink.c
index e7c348d86..9edbc85bf 100644
--- a/test/le_audio/le_audio_unicast_sink.c
+++ b/test/le_audio/le_audio_unicast_sink.c
@@ -220,7 +220,7 @@ static void setup_lc3_decoder(void){
         decoder_contexts[channel] = decoder_context;
         lc3_decoder->configure(decoder_context, sampling_frequency_hz, frame_duration, octets_per_frame);
     }
-    number_samples_per_frame = lc3_decoder->get_number_samples_per_frame(decoder_contexts[0]);
+    number_samples_per_frame = btstack_lc3_samples_per_frame(sampling_frequency_hz, frame_duration);
     btstack_assert(number_samples_per_frame <= MAX_SAMPLES_PER_FRAME);
 }
 
diff --git a/test/le_audio/le_audio_unicast_source.c b/test/le_audio/le_audio_unicast_source.c
index 3027dcec5..28d4d6ef9 100644
--- a/test/le_audio/le_audio_unicast_source.c
+++ b/test/le_audio/le_audio_unicast_source.c
@@ -261,7 +261,7 @@ static void setup_lc3_encoder(void){
         lc3_encoder = btstack_lc3_encoder_google_init_instance(context);
         lc3_encoder->configure(context, sampling_frequency_hz, frame_duration, octets_per_frame);
     }
-    number_samples_per_frame = lc3_encoder->get_number_samples_per_frame(&encoder_contexts[0]);
+    number_samples_per_frame = btstack_lc3_samples_per_frame(sampling_frequency_hz, frame_duration);
     btstack_assert(number_samples_per_frame <= MAX_SAMPLES_PER_FRAME);
     printf("LC3 Encoder config: %u hz, frame duration %s ms, num samples %u, num octets %u\n",
            sampling_frequency_hz, frame_duration == BTSTACK_LC3_FRAME_DURATION_7500US ? "7.5" : "10",