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diff --git a/apps/plugins/mp3_encoder.c b/apps/plugins/mp3_encoder.c
index fe417ce..910437a 100644
--- a/apps/plugins/mp3_encoder.c
+++ b/apps/plugins/mp3_encoder.c
@@ -29,11 +29,11 @@ enum e_byte_order { order_unknown, order_bigEndian, order_littleEndian };
 typedef struct {
     int   type; /* 0=(MPEG2 - 22.05,24,16kHz) 1=(MPEG1 - 44.1,48,32kHz) */
     int   mode; /* 0=stereo, 1=jstereo, 2=dual, 3=mono  */
-    int   bitrate;
     int   padding;
-    int   num_bands;
     long  bitr_id;
     int   smpl_id;
+    uint16_t bitrate;
+    uint8_t num_bands;
 } mpeg_t;

 /* Side information */
@@ -42,13 +42,13 @@ typedef struct {
     int    count1;          /* number of 0-1-quadruples  */
     uint32_t global_gain;
     uint32_t table_select[4];
-    uint32_t region_0_1;
     uint32_t address1;
     uint32_t address2;
     uint32_t address3;
     long     quantStep;
     long     additStep;
     uint32_t max_val;
+    uint8_t  region_0_1;
 } side_info_t;

 typedef struct {
@@ -64,7 +64,7 @@ typedef struct {
     int               channels;
     int               granules;
     int               resample;
-    long              samplerate;
+    uint16_t          samplerate;
 } config_t;

 typedef struct {
@@ -97,14 +97,14 @@ static int       sb_data     [2][2][18][SBLIMIT] IBSS_ATTR; /* 13824 Bytes */
 static int       mdct_freq   [SAMPL2]            IBSS_ATTR; /*  2304 Bytes */
 static char      mdct_sign   [SAMPL2]            IBSS_ATTR; /*   576 Bytes */
 static short     enc_data    [SAMPL2]            IBSS_ATTR; /*  1152 Bytes */
-static uint32_t  scalefac    [23]                IBSS_ATTR; /*    92 Bytes */
+static uint16_t  scalefac    [23]                IBSS_ATTR; /*    46 Bytes */
 static BF_Data   CodedData                       IBSS_ATTR; /*  1056 Bytes */
-static int       ca          [8]                 IBSS_ATTR; /*    32 Bytes */
-static int       cs          [8]                 IBSS_ATTR; /*    32 Bytes */
-static int       cx          [9]                 IBSS_ATTR; /*    36 Bytes */
-static int       win         [18][4]             IBSS_ATTR; /*   288 Bytes */
-static short     enwindow    [15*27+24]          IBSS_ATTR; /*   862 Bytes */
-static short     int2idx     [4096]              IBSS_ATTR; /*  8192 Bytes */
+static int16_t   ca          [8]                 IBSS_ATTR; /*    16 Bytes */
+static uint16_t  cs          [8]                 IBSS_ATTR; /*    16 Bytes */
+static int16_t   cx          [9]                 IBSS_ATTR; /*    18 Bytes */
+static int16_t   win         [18][4]             IBSS_ATTR; /*   144 Bytes */
+static int16_t   enwindow    [15*27+24]          IBSS_ATTR; /*   862 Bytes */
+static uint16_t  int2idx     [4096]              IBSS_ATTR; /*  8192 Bytes */
 static uint8_t   ht_count    [2][2][16]          IBSS_ATTR; /*    64 Bytes */
 static uint32_t  tab01       [ 16]               IBSS_ATTR; /*    64 Bytes */
 static uint32_t  tab23       [  9]               IBSS_ATTR; /*    36 Bytes */
@@ -453,8 +453,8 @@ static const struct huffcodebig ht_big[HTN] =

 static const struct
 {
-  uint32_t region0_cnt;
-  uint32_t region1_cnt;
+  uint8_t region0_cnt;
+  uint8_t region1_cnt;
 } subdv_table[23] =
 { {0, 0}, /*  0 bands */
   {0, 0}, /*  1 bands */
@@ -481,7 +481,7 @@ static const struct
   {6, 7}, /* 22 bands */
 };

-static const uint32_t sfBand[6][23] =
+static const uint16_t sfBand[6][23] =
 {
 /* Table B.2.b: 22.05 kHz */
 {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576},
@@ -497,7 +497,7 @@ static const uint32_t sfBand[6][23] =
 {0,4, 8,12,16,20,24,30,36,44,54,66, 82,102,126,156,194,240,296,364,448,550,576} };


-static const short int2idx_const[4096] = /*  int2idx[i] = sqrt(i*sqrt(i)); */
+static const uint16_t int2idx_const[4096] = /*  int2idx[i] = sqrt(i*sqrt(i)); */
 {
   0,  1,  2,  2,  3,  3,  4,  4,  5,  5,  6,  6,  6,  7,  7,  8,  8,  8,  9,  9,
   9, 10, 10, 11, 11, 11, 12, 12, 12, 12, 13, 13, 13, 14, 14, 14, 15, 15, 15, 16,
@@ -705,33 +705,33 @@ static const short int2idx_const[4096] = /*  int2idx[i] = sqrt(i*sqrt(i)); */
 509,509,509,509,509,509,509,509,509,509,510,510,510,510,510,510,510,510,510,510,
 510,511,511,511,511,511,511,511,511,511,511,512,512,512,512,512 };

-static const int order[32] = 
+static const uint8_t order[32] =
 { 0, 1, 16, 17, 8, 9, 24, 25, 4, 5, 20, 21, 12, 13, 28, 29,
   2, 3, 18, 19,10,11, 26, 27, 6, 7, 22, 23, 14, 15, 30, 31 };

-static const long sampr_index[2][3] = 
+static const uint16_t sampr_index[2][3] =
 { { 22050, 24000, 16000 },      /* MPEG 2 */
   { 44100, 48000, 32000 } };    /* MPEG 1 */

-static const long bitr_index[2][15] =
+static const uint16_t bitr_index[2][15] =
 { {0, 8,16,24,32,40,48,56, 64, 80, 96,112,128,144,160},    /* MPEG 2 */
   {0,32,40,48,56,64,80,96,112,128,160,192,224,256,320} };  /* MPEG 1 */

-static const int num_bands[3][15]  =
+static const uint8_t num_bands[3][15]  =
 { {0,10,10,10,10,12,14,16, 20, 22, 24, 26, 28, 30, 32},
   {0,10,10,10,10,10,12,14, 18, 24, 26, 28, 30, 32, 32},
   {0,10,12,14,18,24,26,28, 30, 32, 32, 32, 32, 32, 32} };

-static const int cx_const[9] =
+static const int16_t cx_const[9] =
 { 16135, 10531,  5604, 15396, -2845,-12551, 14189,  8192, 16384 };

-static const int ca_const[8] =
+static const int16_t ca_const[8] =
 {-16859,-15458,-10269, -5961, -3099, -1342,  -465,  -121 };

-static const int cs_const[8] =
+static const uint16_t cs_const[8] =
 { 28098, 28893, 31117, 32221, 32621, 32740, 32765, 32768 };

-static const short enwindow_const[15*27+24] = 
+static const int16_t enwindow_const[15*27+24] =
 { 0,   65,  593,  1766, 22228, 2115, 611, 62,
   8,  119, 1419, 10564,-11659,-1635,-154, -9,
  -8, -119,-1419,-10564, 11659, 1635, 154,  9, 464,  100,  91,
@@ -782,7 +782,7 @@ static const short enwindow_const[15*27+24] =
  21226,-21226,10604,-10604,1860,-1860,1458,-1458,576,-576,130,-130,60,-60,8,-8
 };

-static const int win_const[18][4] = {
+static const int16_t win_const[18][4] = {
   { -3072, -134, -146, 3352 },
   { -2747, -362, -471, 3579 },
   { -2387, -529, -831, 3747 },
@@ -2011,7 +2011,7 @@ void mdct_long(int *out, int *in)
   out[16] = ct - st;
 }

-static int find_bitrate_index(int type, int bitrate)
+static int find_bitrate_index(int type, uint16_t bitrate)
 {
   int i;

@@ -2022,7 +2022,7 @@ static int find_bitrate_index(int type, int bitrate)
   return i;
 }

-static int find_samplerate_index(long freq, int *mp3_type)
+static int find_samplerate_index(uint16_t freq, int *mp3_type)
 {
   int    mpg, rate;

@@ -2037,7 +2037,7 @@ static int find_samplerate_index(long freq, int *mp3_type)
   return 0;
 }

-void init_mp3_encoder_engine(bool stereo, int bitrate, int sample_rate)
+void init_mp3_encoder_engine(bool stereo, int bitrate, uint16_t sample_rate)
 {
   uint32_t  avg_byte_per_frame;