diff --git a/README.md b/README.md
index c4bfb83..7dcf95f 100644
--- a/README.md
+++ b/README.md
@@ -76,8 +76,8 @@ The default audio alerts are stored in:
 `config/_default_cfg_src_/res/en/`
 
 If you want to change the alert to a custom sound, just replace the sound file you'd like to change
-(ie `config/_default_cfg_src_/res/en/SOUND_POWER_ON.mp3`) with your own MP3 with the same name
-and recompile with `./build.sh`!
+(ie `config/_default_cfg_src_/res/en/SOUND_POWER_ON.opus`) with your own audio file with the same base
+name (ie `config/_default_cfg_src_/res/en/SOUND_POWER_ON.mp3`) and recompile with `./build.sh`!
 
 ### Language support
 
@@ -87,4 +87,4 @@ for languages other than the default English. For example, running `AUDIO=cn ./b
 
 The current languages supported with sound files are English (`en`) and Chinese (`cn`). Other languages 
 (or other sets of custom sounds) may be added by adding all the correct sound files into a 
-`config/_default_cfg_src_/res/<custom_sounds>/` directory and building with `AUDIO=<custom_sounds> ./build.sh`.
\ No newline at end of file
+`config/_default_cfg_src_/res/<custom_sounds>/` directory and building with `AUDIO=<custom_sounds> ./build.sh`.
diff --git a/config/_default_cfg_src_/res/SOUND_MUTE.txt b/config/_default_cfg_src_/res/SOUND_MUTE.txt
deleted file mode 100644
index ff9fc2e..0000000
--- a/config/_default_cfg_src_/res/SOUND_MUTE.txt
+++ /dev/null
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diff --git a/convert.sh b/convert.sh
index ef58349..e6be442 100755
--- a/convert.sh
+++ b/convert.sh
@@ -1,74 +1,79 @@
 #!/bin/sh
+
 txt_to_wav() {
-  hash=$(echo $arg1 | md5sum | cut -d" " -f1)
-  xxd -r -p $arg1 > out-$hash.sbc
-  # sbcinfo out-$hash.sbc
+  hash="$(md5sum "$1" | cut -d ' ' -f 1)"
+  filename="out-$hash.sbc"
+
+  xxd -r -p "$1" > "$filename"
+
   ffmpeg -y \
-    -v quiet         `# verbosity - other options are "quiet", "error", "panic"` \
-    -f sbc          `# accept SBC format` \
-    -ac 1           `# audio channel: #1` \
-    -i ./out-$hash.sbc    `# input file: out.raw` \
-    $arg2           `# output to $arg2`
-  rm out-$hash.sbc
+    -v quiet       `# verbosity - other options are "quiet", "error", "panic"` \
+    -f sbc         `# accept SBC format` \
+    -ac 1          `# audio channel: #1` \
+    -i "$filename" `# input file: out-$hash.sbc` \
+    "$2"           `# output to $2`
+
+  rm "$filename"
 }
 
 audio_to_txt() {
-  hash=$(echo $arg1 | md5sum | cut -d" " -f1)
-  ffmpeg -y \
-    -v quiet            `# verbosity - other options are "quiet", "error", "panic"` \
-    -i $arg1           `#input file: $arg1` \
-    -f sbc             `#output format: SBC` \
-    -ar 16000          `# audio rate: 16 kHz` \
-    -ac 1              `# audio channel: #1` \
-    -aq 16             `# audio quality: 16 (for SBC this means bitpool=16)` \
-    -map_metadata -1   `# ????` \
-    out-$hash.sbc            `# output to out.raw`
+  hash="$(md5sum "$1" | cut -d ' ' -f 1)"
+  filename="out-$hash.sbc"
 
-  # sbcinfo out-$hash.sbc
-  xxd -i out-$hash.sbc            `# output in C include file style` \
+  ffmpeg -y \
+    -v quiet                  `# verbosity - other options are "quiet", "error", "panic"` \
+    -i "$1"                   `# input file: $1` \
+    -f sbc                    `# output format: SBC` \
+    -ar 16000                 `# audio rate: 16 kHz` \
+    -ac 1                     `# audio channel: #1` \
+    -aq 16                    `# audio quality: 16 (for SBC this means bitpool=16)` \
+    -map_metadata -1          `# strip metadata` \
+    "$filename"               `# output to out-$hash.sbc`
+
+  xxd -i "$filename"          `# output in C include file style` \
     | head -n -2              `# skip last two xxd outline lines (skip C formatting)` \
     | tail -n +2              `# start output on line 2 of xxd output (skip C formatting)` \
     | sed 's/ //g'            `# remove spaces` \
     | tr --delete '\n'        `# remove newlines` \
     | sed 's/,/\,\n/16; P; D' `# collect into lines with the right length` \
-    > $arg2
-  rm out-$hash.sbc
+    > "$2"
+
+  rm "$filename"
 }
 
 audio_to_cpp() {
-  hash=$(echo $arg1 | md5sum | cut -d" " -f1)
-  filename="out-$hash.sbc"
-  varname=$(echo $arg1 | rev | cut -c5- | cut -d"/" -f1 | rev | tr '[:lower:]' '[:upper:]' | tr "/" _)
+  varname="$(basename "$1" | rev | cut -f 2- -d '.' | rev | tr '[:lower:]/' '[:upper:]_')"
+
   ffmpeg -y \
-    -v quiet            `# verbosity - other options are "quiet", "error", "panic"` \
-    -i $arg1           `#input file: $arg1` \
-    -f sbc             `#output format: SBC` \
-    -ar 16000          `# audio rate: 16 kHz` \
-    -ac 1              `# audio channel: #1` \
-    -aq 16             `# audio quality: 16 (for SBC this means bitpool=16)` \
-    -map_metadata -1   `# ????` \
-    $varname            `# output to something like EN_SOUND_POWER_ON`
+    -v quiet         `# verbosity - other options are "quiet", "error", "panic"` \
+    -i "$1"          `# input file: $1` \
+    -f sbc           `# output format: SBC` \
+    -ar 16000        `# audio rate: 16 kHz` \
+    -ac 1            `# audio channel: #1` \
+    -aq 16           `# audio quality: 16 (for SBC this means bitpool=16)` \
+    -map_metadata -1 `# strip metadata` \
+    "$varname"       `# output to something like EN_SOUND_POWER_ON`
 
-  echo "#include <stdint.h>\n" > $arg2
+  printf '#include <stdint.h>\n' > "$2"
 
-  # sbcinfo out-$hash.sbc
-  xxd -i $varname            `# output in C include file style` \
-    >> $arg2
+  xxd -i "$varname"  `# output in C include file style` \
+    >> "$2"
 
-  sed -i "s/unsigned char/uint8_t/g" $arg2
-  
-  #rm $filename
+  sed -i 's/unsigned char/uint8_t/g' "$2"
+
+  rm "$varname"
 }
 
-[ "${1}" = "-T" ] || [ "${1}" = "--txt-to-wav"   ] && shift 1 && args=$@ && arg1=$(echo $args | cut -d" " -f1) && arg2=$(echo $args | cut -d" " -f2) && txt_to_wav && exit
-[ "${1}" = "-A" ] || [ "${1}" = "--audio-to-txt" ] && shift 1 && args=$@ && arg1=$(echo $args | cut -d" " -f1) && arg2=$(echo $args | cut -d" " -f2) && audio_to_txt && exit
-[ "${1}" = "-C" ] || [ "${1}" = "--audio-to-cpp" ] && shift 1 && args=$@ && arg1=$(echo $args | cut -d" " -f1) && arg2=$(echo $args | cut -d" " -f2) && audio_to_cpp && exit
+[ "$1" = '-T' ] || [ "$1" = '--txt-to-wav'   ] && shift 1 && txt_to_wav "$@" && exit
+[ "$1" = '-A' ] || [ "$1" = '--audio-to-txt' ] && shift 1 && audio_to_txt "$@" && exit
+[ "$1" = '-C' ] || [ "$1" = '--audio-to-cpp' ] && shift 1 && audio_to_cpp "$@" && exit
+
 echo "
 Sound format converter:
 Usage:
-  ./convert.sh [option] [input-file] [output-file]
+  $0 [option] [input-file] [output-file]
 Options:
--T or --txt-to-wav   Converts the text file to a wav audio file
--A or --audio-to-txt Converts a wav file to a file readable by the old pinebuds firmware
--C or --audio-to-cpp Converts a wav file to a file compilable into the pinebuds firmware
+  -T or --txt-to-wav   Converts the text file to a wav audio file
+  -A or --audio-to-txt Converts an audio file to a file readable by the old pinebuds firmware
+  -C or --audio-to-cpp Converts an audio file to a file compilable into the pinebuds firmware
 "
diff --git a/scripts/build.mk b/scripts/build.mk
index 25c60cc..cd64b88 100644
--- a/scripts/build.mk
+++ b/scripts/build.mk
@@ -244,11 +244,11 @@ $(obj)/%.i: $(src)/%.cpp FORCE
 $(obj)/%.i: $(src)/%.cc FORCE
 	$(call if_changed_dep,cc_i_c++)
 
-# Convert sounds (.mp3 to .txt)
+# Convert sounds (audio to .cpp)
 # ---------------------------------------------------------------------------
 
-%.snd.cpp: %.mp3 FORCE
-	../.././convert.sh -C $< $@
+%.snd.cpp: % FORCE
+	../../convert.sh -C $< $@
 #	$(call if_changed_dep,as_s_S)        TODO! Reference, delete once implemented below
 
 
diff --git a/services/bt_app/Makefile b/services/bt_app/Makefile
index c5624b9..45335d7 100644
--- a/services/bt_app/Makefile
+++ b/services/bt_app/Makefile
@@ -9,9 +9,9 @@ ifeq ($(VOICE_DATAPATH_TYPE),gsound)
 obj_cpp += $(patsubst $(cur_dir)%,%,$(wildcard $(cur_dir)/app_voice/app_$(VOICE_DATAPATH_TYPE)/*.cpp))
 endif
 
-obj_mp3 := $(patsubst $(cur_dir)%,%,$(wildcard ../../config/_default_cfg_src_/res/$(AUDIO)/*.mp3))
+obj_snd := $(patsubst $(cur_dir)%,%,$(wildcard ../../config/_default_cfg_src_/res/$(AUDIO)/*))
 
-obj-y := $(obj_mp3:.mp3=.snd.o) $(obj_mp3:.mp3=.snd.cpp) $(obj_c:.c=.o) $(obj_s:.S=.o) $(obj_cpp:.cpp=.o)
+obj-y := $(obj_snd:=.snd.o) $(obj_snd:=.snd.cpp) $(obj_c:.c=.o) $(obj_s:.S=.o) $(obj_cpp:.cpp=.o)
 
 obj-y += a2dp_codecs/
 
diff --git a/services/bt_app/app_media_player.cpp b/services/bt_app/app_media_player.cpp
index 52256a6..b76e63d 100644
--- a/services/bt_app/app_media_player.cpp
+++ b/services/bt_app/app_media_player.cpp
@@ -123,21 +123,15 @@ typedef struct tMediaSoundMap {
 } _tMediaSoundMap;
 
 const tMediaSoundMap media_sound_map[MAX_SOUND_NUMBER] = {
-    {(U8 *)SOUND_ZERO, SOUND_ZERO_len},
-    {(U8 *)SOUND_ONE, SOUND_ONE_len},
-    {(U8 *)SOUND_TWO, SOUND_TWO_len},
-    {(U8 *)SOUND_THREE, SOUND_THREE_len},
-    {(U8 *)SOUND_FOUR, SOUND_FOUR_len},
-    {(U8 *)SOUND_FIVE, SOUND_FIVE_len},
-    {(U8 *)SOUND_SIX, SOUND_SIX_len},
-    {(U8 *)SOUND_SEVEN, SOUND_SEVEN_len},
-    {(U8 *)SOUND_EIGHT, SOUND_EIGHT_len},
-    {(U8 *)SOUND_NINE, SOUND_NINE_len},
+    {(U8 *)SOUND_ZERO, SOUND_ZERO_len},   {(U8 *)SOUND_ONE, SOUND_ONE_len},
+    {(U8 *)SOUND_TWO, SOUND_TWO_len},     {(U8 *)SOUND_THREE, SOUND_THREE_len},
+    {(U8 *)SOUND_FOUR, SOUND_FOUR_len},   {(U8 *)SOUND_FIVE, SOUND_FIVE_len},
+    {(U8 *)SOUND_SIX, SOUND_SIX_len},     {(U8 *)SOUND_SEVEN, SOUND_SEVEN_len},
+    {(U8 *)SOUND_EIGHT, SOUND_EIGHT_len}, {(U8 *)SOUND_NINE, SOUND_NINE_len},
 };
 
-const uint8_t BT_MUTE[] = {
-#include "res/SOUND_MUTE.txt"
-};
+extern const uint8_t SOUND_MUTE[];
+extern const unsigned SOUND_MUTE_len;
 
 char Media_player_number[MAX_PHB_NUMBER];
 
@@ -449,149 +443,149 @@ void media_runtime_audio_prompt_update(uint16_t id, uint8_t **ptr,
                                        uint32_t *len) {
   switch (id) {
   case AUD_ID_POWER_ON:
-    g_app_audio_data = (U8*)SOUND_POWER_ON; // aud_get_reouce((AUD_ID_ENUM)id,
-                                 // &g_app_audio_length, &type);
+    g_app_audio_data = (U8 *)SOUND_POWER_ON; // aud_get_reouce((AUD_ID_ENUM)id,
+                                             // &g_app_audio_length, &type);
     g_app_audio_length = SOUND_POWER_ON_len;
     break;
   case AUD_ID_POWER_OFF:
-    g_app_audio_data = (U8*)SOUND_POWER_OFF;
+    g_app_audio_data = (U8 *)SOUND_POWER_OFF;
     g_app_audio_length = SOUND_POWER_OFF_len;
     break;
   case AUD_ID_BT_PAIR_ENABLE:
-    g_app_audio_data = (U8*)SOUND_PAIR_ENABLE;
+    g_app_audio_data = (U8 *)SOUND_PAIR_ENABLE;
     g_app_audio_length = SOUND_PAIR_ENABLE_len;
     break;
   case AUD_ID_BT_PAIRING:
-    g_app_audio_data = (U8*)SOUND_PAIRING;
+    g_app_audio_data = (U8 *)SOUND_PAIRING;
     g_app_audio_length = SOUND_PAIRING_len;
     break;
   case AUD_ID_BT_PAIRING_SUC:
-    g_app_audio_data = (U8*)SOUND_PAIRING_SUCCESS;
+    g_app_audio_data = (U8 *)SOUND_PAIRING_SUCCESS;
     g_app_audio_length = SOUND_PAIRING_SUCCESS_len;
     break;
   case AUD_ID_BT_PAIRING_FAIL:
-    g_app_audio_data = (U8*)SOUND_PAIRING_FAIL;
+    g_app_audio_data = (U8 *)SOUND_PAIRING_FAIL;
     g_app_audio_length = SOUND_PAIRING_FAIL_len;
     break;
   case AUD_ID_BT_CALL_REFUSE:
-    g_app_audio_data = (U8*)SOUND_REFUSE;
+    g_app_audio_data = (U8 *)SOUND_REFUSE;
     g_app_audio_length = SOUND_REFUSE_len;
     break;
   case AUD_ID_BT_CALL_OVER:
-    g_app_audio_data = (U8*)SOUND_OVER;
+    g_app_audio_data = (U8 *)SOUND_OVER;
     g_app_audio_length = SOUND_OVER_len;
     break;
   case AUD_ID_BT_CALL_ANSWER:
-    g_app_audio_data = (U8*)SOUND_ANSWER;
+    g_app_audio_data = (U8 *)SOUND_ANSWER;
     g_app_audio_length = SOUND_ANSWER_len;
     break;
   case AUD_ID_BT_CALL_HUNG_UP:
-    g_app_audio_data = (U8*)SOUND_HUNG_UP;
+    g_app_audio_data = (U8 *)SOUND_HUNG_UP;
     g_app_audio_length = SOUND_HUNG_UP_len;
     break;
   case AUD_ID_BT_CALL_INCOMING_CALL:
-    g_app_audio_data = (U8*)SOUND_INCOMING_CALL;
+    g_app_audio_data = (U8 *)SOUND_INCOMING_CALL;
     g_app_audio_length = SOUND_INCOMING_CALL_len;
     break;
   case AUD_ID_BT_CHARGE_PLEASE:
-    g_app_audio_data = (U8*)SOUND_CHARGE_PLEASE;
+    g_app_audio_data = (U8 *)SOUND_CHARGE_PLEASE;
     g_app_audio_length = SOUND_CHARGE_PLEASE_len;
     break;
   case AUD_ID_BT_CHARGE_FINISH:
-    g_app_audio_data = (U8*)SOUND_CHARGE_FINISH;
+    g_app_audio_data = (U8 *)SOUND_CHARGE_FINISH;
     g_app_audio_length = SOUND_CHARGE_FINISH_len;
     break;
   case AUD_ID_BT_CONNECTED:
-    g_app_audio_data = (U8*)SOUND_CONNECTED;
+    g_app_audio_data = (U8 *)SOUND_CONNECTED;
     g_app_audio_length = SOUND_CONNECTED_len;
     break;
   case AUD_ID_BT_DIS_CONNECT:
-    g_app_audio_data = (U8*)SOUND_DIS_CONNECT;
+    g_app_audio_data = (U8 *)SOUND_DIS_CONNECT;
     g_app_audio_length = SOUND_DIS_CONNECT_len;
     break;
   case AUD_ID_BT_WARNING:
-    g_app_audio_data = (U8*)SOUND_WARNING;
+    g_app_audio_data = (U8 *)SOUND_WARNING;
     g_app_audio_length = SOUND_WARNING_len;
     break;
   case AUDIO_ID_BT_ALEXA_START:
-    g_app_audio_data = (U8*)SOUND_ALEXA_START;
+    g_app_audio_data = (U8 *)SOUND_ALEXA_START;
     g_app_audio_length = SOUND_ALEXA_START_len;
     break;
   case AUDIO_ID_BT_ALEXA_STOP:
   case AUDIO_ID_FIND_MY_BUDS:
   case AUDIO_ID_FIND_TILE:
-    g_app_audio_data = (U8*)SOUND_ALEXA_STOP;
+    g_app_audio_data = (U8 *)SOUND_ALEXA_STOP;
     g_app_audio_length = SOUND_ALEXA_STOP_len;
     break;
   case AUDIO_ID_BT_GSOUND_MIC_OPEN:
-    g_app_audio_data = (U8*)SOUND_GSOUND_MIC_OPEN;
+    g_app_audio_data = (U8 *)SOUND_GSOUND_MIC_OPEN;
     g_app_audio_length = SOUND_GSOUND_MIC_OPEN_len;
     break;
   case AUDIO_ID_BT_GSOUND_MIC_CLOSE:
-    g_app_audio_data = (U8*)SOUND_GSOUND_MIC_CLOSE;
+    g_app_audio_data = (U8 *)SOUND_GSOUND_MIC_CLOSE;
     g_app_audio_length = SOUND_GSOUND_MIC_CLOSE_len;
     break;
   case AUDIO_ID_BT_GSOUND_NC:
-    g_app_audio_data = (U8*)SOUND_GSOUND_NC;
+    g_app_audio_data = (U8 *)SOUND_GSOUND_NC;
     g_app_audio_length = SOUND_GSOUND_NC_len;
     break;
   case AUD_ID_LANGUAGE_SWITCH:
-    g_app_audio_data = (U8*)SOUND_LANGUAGE_SWITCH;
+    g_app_audio_data = (U8 *)SOUND_LANGUAGE_SWITCH;
     g_app_audio_length = SOUND_LANGUAGE_SWITCH_len;
     break;
   case AUDIO_ID_BT_MUTE:
-    g_app_audio_data = (U8 *)BT_MUTE;
-    g_app_audio_length = sizeof(BT_MUTE);
+    g_app_audio_data = (U8 *)SOUND_MUTE;
+    g_app_audio_length = SOUND_MUTE_len;
     break;
   case AUD_ID_NUM_0:
-    g_app_audio_data = (U8*)SOUND_ZERO;
+    g_app_audio_data = (U8 *)SOUND_ZERO;
     g_app_audio_length = SOUND_ZERO_len;
     break;
   case AUD_ID_NUM_1:
-    g_app_audio_data = (U8*)SOUND_ONE;
+    g_app_audio_data = (U8 *)SOUND_ONE;
     g_app_audio_length = SOUND_ONE_len;
     break;
   case AUD_ID_NUM_2:
-    g_app_audio_data = (U8*)SOUND_TWO;
+    g_app_audio_data = (U8 *)SOUND_TWO;
     g_app_audio_length = SOUND_TWO_len;
     break;
   case AUD_ID_NUM_3:
-    g_app_audio_data = (U8*)SOUND_THREE;
+    g_app_audio_data = (U8 *)SOUND_THREE;
     g_app_audio_length = SOUND_THREE_len;
     break;
   case AUD_ID_NUM_4:
-    g_app_audio_data = (U8*)SOUND_FOUR;
+    g_app_audio_data = (U8 *)SOUND_FOUR;
     g_app_audio_length = SOUND_FOUR_len;
     break;
   case AUD_ID_NUM_5:
-    g_app_audio_data = (U8*)SOUND_FIVE;
+    g_app_audio_data = (U8 *)SOUND_FIVE;
     g_app_audio_length = SOUND_FIVE_len;
     break;
   case AUD_ID_NUM_6:
-    g_app_audio_data = (U8*)SOUND_SIX;
+    g_app_audio_data = (U8 *)SOUND_SIX;
     g_app_audio_length = SOUND_SIX_len;
     break;
   case AUD_ID_NUM_7:
-    g_app_audio_data = (U8*)SOUND_SEVEN;
+    g_app_audio_data = (U8 *)SOUND_SEVEN;
     g_app_audio_length = SOUND_SEVEN_len;
     break;
   case AUD_ID_NUM_8:
-    g_app_audio_data = (U8*)SOUND_EIGHT;
+    g_app_audio_data = (U8 *)SOUND_EIGHT;
     g_app_audio_length = SOUND_EIGHT_len;
     break;
   case AUD_ID_NUM_9:
-    g_app_audio_data = (U8*)SOUND_NINE;
+    g_app_audio_data = (U8 *)SOUND_NINE;
     g_app_audio_length = SOUND_NINE_len;
     break;
 #ifdef __BT_WARNING_TONE_MERGE_INTO_STREAM_SBC__
   case AUD_ID_RING_WARNING:
-    g_app_audio_data = (U8*)RES_AUD_RING_SAMPRATE_16000;
+    g_app_audio_data = (U8 *)RES_AUD_RING_SAMPRATE_16000;
     g_app_audio_length = RES_AUD_RING_SAMPRATE_16000;
     break;
 #endif
 #ifdef __INTERACTION__
   case AUD_ID_BT_FINDME:
-    g_app_audio_data = (U8*)SOUND_FINDME;
+    g_app_audio_data = (U8 *)SOUND_FINDME;
     g_app_audio_length = SOUND_FINDME_len;
     break;
 #endif
diff --git a/services/bt_app/res_audio_data.h b/services/bt_app/res_audio_data.h
index cac08fb..bdbdcb2 100644
--- a/services/bt_app/res_audio_data.h
+++ b/services/bt_app/res_audio_data.h
@@ -1,3 +1,5 @@
+#pragma once
+
 /***************************************************************************
  *
  * Copyright 2015-2019 BES.
@@ -13,148 +15,75 @@
  * trademark and other intellectual property rights.
  *
  ****************************************************************************/
-
 #ifdef MEDIA_PLAYER_SUPPORT
 
-extern const uint8_t SOUND_POWER_ON [];
-
-extern const uint8_t SOUND_POWER_OFF [];
-
+extern const uint8_t SOUND_POWER_ON[];
+extern const uint8_t SOUND_POWER_OFF[];
 extern const uint8_t SOUND_ZERO[];
-
 extern const uint8_t SOUND_ONE[];
-
 extern const uint8_t SOUND_TWO[];
-
 extern const uint8_t SOUND_THREE[];
-
 extern const uint8_t SOUND_FOUR[];
-
 extern const uint8_t SOUND_FIVE[];
-
 extern const uint8_t SOUND_SIX[];
-
-extern const uint8_t SOUND_SEVEN [];
-
-extern const uint8_t SOUND_EIGHT [];
-
-extern const uint8_t SOUND_NINE [];
-
+extern const uint8_t SOUND_SEVEN[];
+extern const uint8_t SOUND_EIGHT[];
+extern const uint8_t SOUND_NINE[];
 extern const uint8_t SOUND_PAIR_ENABLE[];
-
 extern const uint8_t SOUND_PAIRING[];
-
 extern const uint8_t SOUND_PAIRING_FAIL[];
-
 extern const uint8_t SOUND_PAIRING_SUCCESS[];
-
 extern const uint8_t SOUND_REFUSE[];
-
 extern const uint8_t SOUND_OVER[];
-
 extern const uint8_t SOUND_ANSWER[];
-
 extern const uint8_t SOUND_HUNG_UP[];
-
-extern const uint8_t SOUND_CONNECTED [];
-
-extern const uint8_t SOUND_DIS_CONNECT [];
-
+extern const uint8_t SOUND_CONNECTED[];
+extern const uint8_t SOUND_DIS_CONNECT[];
 extern const uint8_t SOUND_INCOMING_CALL[];
-
 extern const uint8_t SOUND_CHARGE_PLEASE[];
-
 extern const uint8_t SOUND_CHARGE_FINISH[];
-
 extern const uint8_t SOUND_LANGUAGE_SWITCH[];
-
 extern const uint8_t SOUND_WARNING[];
-
 extern const uint8_t SOUND_ALEXA_START[];
-
 extern const uint8_t SOUND_ALEXA_STOP[];
-
 extern const uint8_t SOUND_GSOUND_MIC_OPEN[];
-
 extern const uint8_t SOUND_GSOUND_MIC_CLOSE[];
-
 extern const uint8_t DUDU[];
-
 extern const uint8_t SOUND_GSOUND_NC[];
 
-
-
-
-
-
-
-extern unsigned int SOUND_POWER_ON_len;
-
-extern unsigned int SOUND_POWER_OFF_len;
-
-extern unsigned int SOUND_ZERO_len;
-
-extern unsigned int SOUND_ONE_len;
-
-extern unsigned int SOUND_TWO_len;
-
-extern unsigned int SOUND_THREE_len;
-
-extern unsigned int SOUND_FOUR_len;
-
-extern unsigned int SOUND_FIVE_len;
-
-extern unsigned int SOUND_SIX_len;
-
-extern unsigned int SOUND_SEVEN_len;
-
-extern unsigned int SOUND_EIGHT_len;
-
-extern unsigned int SOUND_NINE_len;
-
-extern unsigned int SOUND_PAIR_ENABLE_len;
-
-extern unsigned int SOUND_PAIRING_len;
-
-extern unsigned int SOUND_PAIRING_FAIL_len;
-
-extern unsigned int SOUND_PAIRING_SUCCESS_len;
-
-extern unsigned int SOUND_REFUSE_len;
-
-extern unsigned int SOUND_OVER_len;
-
-extern unsigned int SOUND_ANSWER_len;
-
-extern unsigned int SOUND_HUNG_UP_len;
-
-extern unsigned int SOUND_CONNECTED_len;
-
-extern unsigned int SOUND_DIS_CONNECT_len;
-
-extern unsigned int SOUND_INCOMING_CALL_len;
-
-extern unsigned int SOUND_CHARGE_PLEASE_len;
-
-extern unsigned int SOUND_CHARGE_FINISH_len;
-
-extern unsigned int SOUND_LANGUAGE_SWITCH_len;
-
-extern unsigned int SOUND_WARNING_len;
-
-extern unsigned int SOUND_ALEXA_START_len;
-
-extern unsigned int SOUND_ALEXA_STOP_len;
-
-extern unsigned int SOUND_GSOUND_MIC_OPEN_len;
-
-extern unsigned int SOUND_GSOUND_MIC_CLOSE_len;
-
-extern unsigned int DUDU_len;
-
-extern unsigned int SOUND_GSOUND_NC_len;
-
-
+extern const unsigned SOUND_POWER_ON_len;
+extern const unsigned SOUND_POWER_OFF_len;
+extern const unsigned SOUND_ZERO_len;
+extern const unsigned SOUND_ONE_len;
+extern const unsigned SOUND_TWO_len;
+extern const unsigned SOUND_THREE_len;
+extern const unsigned SOUND_FOUR_len;
+extern const unsigned SOUND_FIVE_len;
+extern const unsigned SOUND_SIX_len;
+extern const unsigned SOUND_SEVEN_len;
+extern const unsigned SOUND_EIGHT_len;
+extern const unsigned SOUND_NINE_len;
+extern const unsigned SOUND_PAIR_ENABLE_len;
+extern const unsigned SOUND_PAIRING_len;
+extern const unsigned SOUND_PAIRING_FAIL_len;
+extern const unsigned SOUND_PAIRING_SUCCESS_len;
+extern const unsigned SOUND_REFUSE_len;
+extern const unsigned SOUND_OVER_len;
+extern const unsigned SOUND_ANSWER_len;
+extern const unsigned SOUND_HUNG_UP_len;
+extern const unsigned SOUND_CONNECTED_len;
+extern const unsigned SOUND_DIS_CONNECT_len;
+extern const unsigned SOUND_INCOMING_CALL_len;
+extern const unsigned SOUND_CHARGE_PLEASE_len;
+extern const unsigned SOUND_CHARGE_FINISH_len;
+extern const unsigned SOUND_LANGUAGE_SWITCH_len;
+extern const unsigned SOUND_WARNING_len;
+extern const unsigned SOUND_ALEXA_START_len;
+extern const unsigned SOUND_ALEXA_STOP_len;
+extern const unsigned SOUND_GSOUND_MIC_OPEN_len;
+extern const unsigned SOUND_GSOUND_MIC_CLOSE_len;
+extern const unsigned DUDU_len;
+extern const unsigned SOUND_GSOUND_NC_len;
 
 #ifdef __INTERACTION__
 extern const uint8_t SOUND_FINDME[];