New channel configuration setting, allowing fine-grained control of the stereo width. This replaces the 'stereo narrow' and 'stereo wide' modes.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@5559 a1c6a512-1295-4272-9138-f99709370657

8 files changed, 191 insertions, 138 deletions

diff --git a/apps/lang/deutsch.lang b/apps/lang/deutsch.lang
index 8aa8425c47..1010493231 100644
--- a/apps/lang/deutsch.lang
+++ b/apps/lang/deutsch.lang
@@ -1261,22 +1261,22 @@ voice: "LCD-Modus"
 new: "LCD-Modus"
 
 id: LANG_CHANNEL_STEREO_NARROW_PLAYER
-desc: in sound_settings
-eng: "St. Narrow"
-voice: "Stereo schmal"
-new: "St. schmal"
+desc: DEPRECATED
+eng: ""
+voice: ""
+new:
 
 id: LANG_CHANNEL_STEREO_NARROW_RECORDER
-desc: in sound_settings
-eng: "Stereo Narrow"
-voice: "Stereo schmal"
-new: "Stereo schmal"
+desc: DEPRECATED
+eng: ""
+voice: ""
+new:
 
 id: LANG_CHANNEL_STEREO_WIDE
-desc: in sound_settings
-eng: "Stereo Wide"
-voice: "Stereo breit"
-new: "Stereo breit"
+desc: DEPRECATED
+eng: ""
+voice: ""
+new:
 
 id: LANG_CHANNEL_KARAOKE
 desc: in sound_settings
@@ -2846,3 +2846,16 @@ eng: ""
 voice: " "
 new:
 
+id: LANG_STEREO_WIDTH
+desc: in sound_settings
+eng: "Stereo width"
+voice: "Stereobasisbreite"
+new: "Stereobasisbreite"
+
+id: LANG_CHANNEL_CUSTOM
+desc: in sound_settings
+eng: "Custom"
+voice: "Angepasst"
+new: "Angepasst"
+
+
diff --git a/apps/lang/english.lang b/apps/lang/english.lang
index 1f2dd4d9e3..4cc95b8383 100644
--- a/apps/lang/english.lang
+++ b/apps/lang/english.lang
@@ -1274,21 +1274,21 @@ voice: "LCD Mode"
 new:
 
 id: LANG_CHANNEL_STEREO_NARROW_PLAYER
-desc: in sound_settings
-eng: "St. Narrow"
-voice: "Stereo Narrow"
+desc: DEPRECATED
+eng: ""
+voice: ""
 new:
 
 id: LANG_CHANNEL_STEREO_NARROW_RECORDER
-desc: in sound_settings
-eng: "Stereo Narrow"
-voice: "Stereo Narrow"
+desc: DEPRECATED
+eng: ""
+voice: ""
 new:
 
 id: LANG_CHANNEL_STEREO_WIDE
-desc: in sound_settings
-eng: "Stereo Wide"
-voice: "Stereo Wide"
+desc: DEPRECATED
+eng: ""
+voice: ""
 new:
 
 id: LANG_CHANNEL_KARAOKE
@@ -2860,3 +2860,16 @@ eng: ""
 voice: " "
 new:
 
+id: LANG_STEREO_WIDTH
+desc: in sound_settings
+eng: "Stereo width"
+voice: "Stereo width"
+new:
+
+id: LANG_CHANNEL_CUSTOM
+desc: in sound_settings
+eng: "Custom"
+voice: "Custom"
+new:
+
+
diff --git a/apps/main.c b/apps/main.c
index 964a7c8b4f..cc270ba136 100644
--- a/apps/main.c
+++ b/apps/main.c
@@ -140,6 +140,7 @@ void init(void)
               global_settings.loudness,
               global_settings.avc,
               global_settings.channel_config,
+              global_settings.stereo_width,
               global_settings.mdb_strength,
               global_settings.mdb_harmonics,
               global_settings.mdb_center,
@@ -272,6 +273,7 @@ void init(void)
               global_settings.loudness,
               global_settings.avc,
               global_settings.channel_config,
+              global_settings.stereo_width,
               global_settings.mdb_strength,
               global_settings.mdb_harmonics,
               global_settings.mdb_center,
diff --git a/apps/settings.c b/apps/settings.c
index d4945d4431..ca1b900ef4 100644
--- a/apps/settings.c
+++ b/apps/settings.c
@@ -71,7 +71,7 @@ const char rec_base_directory[] = REC_BASE_DIR;
 
 
 
-#define CONFIG_BLOCK_VERSION 18
+#define CONFIG_BLOCK_VERSION 19
 #define CONFIG_BLOCK_SIZE 512
 #define RTC_BLOCK_SIZE 44
 
@@ -170,8 +170,9 @@ static const struct bit_entry rtc_bits[] =
     {3, S_O(avc), 0, "auto volume", "off,20ms,2,4,8" },
     {1, S_O(superbass), false, "superbass", off_on },
 #endif
-    {3, S_O(channel_config), 6, "channels", 
-        "stereo,stereo narrow,mono,mono left,mono right,karaoke,stereo wide" },
+    {3, S_O(channel_config), 0, "channels",
+        "stereo,mono,custom,mono left,mono right,karaoke" },
+    {8, S_O(stereo_width), 100, "stereo width", NULL},
     /* playback */
     {2, S_O(resume), RESUME_ASK, "resume", "off,ask,ask once,on" },
     {1, S_O(playlist_shuffle), false, "shuffle", off_on },
@@ -206,7 +207,7 @@ static const struct bit_entry rtc_bits[] =
 #endif
     {1, S_O(show_icons), true, "show icons", off_on },
     /* system */
-    {4, S_O(poweroff), 10, 
+    {4, S_O(poweroff), 10,
         "idle poweroff", "off,1,2,3,4,5,6,7,8,9,10,15,30,45,60" },
     {18, S_O(runtime), 0, NULL, NULL },
     {18, S_O(topruntime), 0, NULL, NULL },
@@ -221,19 +222,20 @@ static const struct bit_entry rtc_bits[] =
 #endif
     {12, S_O(battery_capacity), BATTERY_CAPACITY_MIN, "battery capacity",
          NULL }, /* 1500...3200 for NiMH, 2200...3200 for LiIon,
-                    1000...2000 for Alkaline */
+                     500...1500 for Alkaline */
 #ifdef HAVE_CHARGING
     {1, S_O(car_adapter_mode), false, "car adapter mode", off_on },
 #endif
-
-    /* new stuff to be added here */
-    /* If values are just added to the end, no need to bump the version. */
+    /* tuner */
 #ifdef CONFIG_TUNER
     {1, S_O(fm_force_mono), false, "force fm mono", off_on },
     {8, S_O(last_frequency), 0, NULL, NULL }, /* Default: MIN_FREQ */
 #endif
 
-    /* Current sum of bits: 286 (worst case) */
+    /* new stuff to be added here */
+    /* If values are just added to the end, no need to bump the version. */
+
+    /* Current sum of bits: 259 (worst case) */
     /* Sum of all bit sizes must not grow beyond 288! */
 };
 
@@ -716,6 +718,7 @@ void sound_settings_apply(void)
     mpeg_sound_set(SOUND_BALANCE, global_settings.balance);
     mpeg_sound_set(SOUND_VOLUME, global_settings.volume);
     mpeg_sound_set(SOUND_CHANNELS, global_settings.channel_config);
+    mpeg_sound_set(SOUND_STEREO_WIDTH, global_settings.stereo_width);
 #if (CONFIG_HWCODEC == MAS3587F) || (CONFIG_HWCODEC == MAS3539F)
     mpeg_sound_set(SOUND_LOUDNESS, global_settings.loudness);
     mpeg_sound_set(SOUND_AVC, global_settings.avc);
@@ -1261,6 +1264,7 @@ void settings_reset(void) {
     global_settings.loudness    = mpeg_sound_default(SOUND_LOUDNESS);
     global_settings.avc         = mpeg_sound_default(SOUND_AVC);
     global_settings.channel_config = mpeg_sound_default(SOUND_CHANNELS);
+    global_settings.stereo_width = mpeg_sound_default(SOUND_STEREO_WIDTH);
     global_settings.mdb_strength = mpeg_sound_default(SOUND_MDB_STRENGTH);
     global_settings.mdb_harmonics = mpeg_sound_default(SOUND_MDB_HARMONICS);
     global_settings.mdb_center = mpeg_sound_default(SOUND_MDB_CENTER);
diff --git a/apps/settings.h b/apps/settings.h
index 8d92aa9ad1..88bc71804a 100644
--- a/apps/settings.h
+++ b/apps/settings.h
@@ -129,7 +129,8 @@ struct user_settings
     int treble;     /* treble eq:            0-100 0=low   100=high          */
     int loudness;   /* loudness eq:          0-100 0=off   100=max           */
     int avc;        /* auto volume correct:  0=off, 1=20ms, 2=2s 3=4s 4=8s   */
-    int channel_config;  /* Stereo, Mono, Mono left, Mono right */
+    int channel_config; /* Stereo, Mono, Custom, Mono left, Mono right, Karaoke */
+    int stereo_width; /* 0-255% */
     int mdb_strength; /* 0-127dB */
     int mdb_harmonics; /* 0-100% */
     int mdb_center; /* 20-300Hz */
diff --git a/apps/sound_menu.c b/apps/sound_menu.c
index de5b8c0a8c..6e5b74bfa3 100644
--- a/apps/sound_menu.c
+++ b/apps/sound_menu.c
@@ -385,19 +385,20 @@ static bool chanconf(void)
 {
     static const struct opt_items names[] = {
         { STR(LANG_CHANNEL_STEREO) },
-#ifdef HAVE_LCD_CHARCELLS
-        { STR(LANG_CHANNEL_STEREO_NARROW_PLAYER) },
-#else
-        { STR(LANG_CHANNEL_STEREO_NARROW_RECORDER) },
-#endif
         { STR(LANG_CHANNEL_MONO) },
+        { STR(LANG_CHANNEL_CUSTOM) },
         { STR(LANG_CHANNEL_LEFT) },
         { STR(LANG_CHANNEL_RIGHT) },
-        { STR(LANG_CHANNEL_KARAOKE) }, 
-        { STR(LANG_CHANNEL_STEREO_WIDE) }
+        { STR(LANG_CHANNEL_KARAOKE) }
     };
     return set_option(str(LANG_CHANNEL), &global_settings.channel_config, INT,
-                      names, 7, set_chanconf );
+                      names, 6, set_chanconf );
+}
+
+static bool stereo_width(void)
+{
+    return set_sound(str(LANG_STEREO_WIDTH), &global_settings.stereo_width,
+                     SOUND_STEREO_WIDTH);
 }
 
 bool sound_menu(void)
@@ -410,6 +411,7 @@ bool sound_menu(void)
         { ID2P(LANG_TREBLE), treble },
         { ID2P(LANG_BALANCE), balance },
         { ID2P(LANG_CHANNEL_MENU), chanconf },
+        { ID2P(LANG_STEREO_WIDTH), stereo_width },
 #if (CONFIG_HWCODEC == MAS3587F) || (CONFIG_HWCODEC == MAS3539F)
         { ID2P(LANG_LOUDNESS), loudness },
         { ID2P(LANG_AUTOVOL), avc },
diff --git a/firmware/export/mp3_playback.h b/firmware/export/mp3_playback.h
index 456569342b..aced6ddc94 100644
--- a/firmware/export/mp3_playback.h
+++ b/firmware/export/mp3_playback.h
@@ -25,8 +25,8 @@
 #include <stdbool.h>
 
 /* functions formerly in mpeg.c */
-void mp3_init(int volume, int bass, int treble, int balance,
-              int loudness, int avc, int channel_config,
+void mp3_init(int volume, int bass, int treble, int balance, int loudness,
+              int avc, int channel_config, int stereo_width,
               int mdb_strength, int mdb_harmonics,
               int mdb_center, int mdb_shape, bool mdb_enable,
               bool superbass);
@@ -70,23 +70,23 @@ void mp3_shutdown(void);
 #define SOUND_LOUDNESS 4
 #define SOUND_AVC 5
 #define SOUND_CHANNELS 6
-#define SOUND_LEFT_GAIN 7
-#define SOUND_RIGHT_GAIN 8
-#define SOUND_MIC_GAIN 9
-#define SOUND_MDB_STRENGTH 10
-#define SOUND_MDB_HARMONICS 11
-#define SOUND_MDB_CENTER 12
-#define SOUND_MDB_SHAPE 13
-#define SOUND_MDB_ENABLE 14
-#define SOUND_SUPERBASS 15
-#define SOUND_NUMSETTINGS 16
+#define SOUND_STEREO_WIDTH 7
+#define SOUND_LEFT_GAIN 8
+#define SOUND_RIGHT_GAIN 9
+#define SOUND_MIC_GAIN 10
+#define SOUND_MDB_STRENGTH 11
+#define SOUND_MDB_HARMONICS 12
+#define SOUND_MDB_CENTER 13
+#define SOUND_MDB_SHAPE 14
+#define SOUND_MDB_ENABLE 15
+#define SOUND_SUPERBASS 16
+#define SOUND_NUMSETTINGS 17
 
 #define MPEG_SOUND_STEREO 0
-#define MPEG_SOUND_STEREO_NARROW 1
-#define MPEG_SOUND_MONO 2
+#define MPEG_SOUND_MONO 1
+#define MPEG_SOUND_CUSTOM 2
 #define MPEG_SOUND_MONO_LEFT 3
 #define MPEG_SOUND_MONO_RIGHT 4
 #define MPEG_SOUND_KARAOKE 5
-#define MPEG_SOUND_STEREO_WIDE 6
 
 #endif /* #ifndef _MP3_PLAYBACK_H_ */
diff --git a/firmware/mp3_playback.c b/firmware/mp3_playback.c
index 140d1ff75b..f2c588c6b5 100644
--- a/firmware/mp3_playback.c
+++ b/firmware/mp3_playback.c
@@ -72,6 +72,7 @@ static const char* const units[] =
     "dB",   /* Loudness */
     "",     /* AVC */
     "",     /* Channels */
+    "%",    /* Stereo width */
     "dB",   /* Left gain */
     "dB",   /* Right gain */
     "dB",   /* Mic gain */
@@ -92,6 +93,7 @@ static const int numdecimals[] =
     0,    /* Loudness */
     0,    /* AVC */
     0,    /* Channels */
+    0,    /* Stereo width */
     1,    /* Left gain */
     1,    /* Right gain */
     1,    /* Mic gain */
@@ -112,6 +114,7 @@ static const int steps[] =
     1,    /* Loudness */
     1,    /* AVC */
     1,    /* Channels */
+    1,    /* Stereo width */
     1,    /* Left gain */
     1,    /* Right gain */
     1,    /* Mic gain */
@@ -137,6 +140,7 @@ static const int minval[] =
     0,    /* Loudness */
     -1,   /* AVC */
     0,    /* Channels */
+    0,    /* Stereo width */
     0,    /* Left gain */
     0,    /* Right gain */
     0,    /* Mic gain */
@@ -161,7 +165,8 @@ static const int maxval[] =
     100,   /* Balance */
     17,   /* Loudness */
     4,    /* AVC */
-    6,    /* Channels */
+    5,    /* Channels */
+    255,  /* Stereo width */
     15,   /* Left gain */
     15,   /* Right gain */
     15,   /* Mic gain */
@@ -187,6 +192,7 @@ static const int defaultval[] =
     0,    /* Loudness */
     0,    /* AVC */
     0,    /* Channels */
+    100,  /* Stereo width */
     8,    /* Left gain */
     8,    /* Right gain */
     2,    /* Mic gain */
@@ -566,8 +572,6 @@ static void init_playback(void)
         mas_readmem(MAS_BANK_D0, MAS_D0_APP_RUNNING, &val, 1);
     } while((val & 0x0c) != 0x0c);
 
-    mpeg_sound_channel_config(MPEG_SOUND_STEREO);
-
 #if CONFIG_HWCODEC == MAS3587F
     mpeg_mode = MPEG_DECODER;
 #endif
@@ -619,6 +623,89 @@ void set_prescaled_volume(void)
 #endif /* MAS3507D */
 #endif /* !SIMULATOR */
 
+int channel_configuration = MPEG_SOUND_STEREO;
+int stereo_width = 100;
+
+#ifndef SIMULATOR
+static void set_channel_config(void)
+{
+    /* default values: stereo */
+    unsigned long val_ll = 0x80000;
+    unsigned long val_lr = 0;
+    unsigned long val_rl = 0;
+    unsigned long val_rr = 0x80000;
+    
+    switch(channel_configuration)
+    {
+        /* case MPEG_SOUND_STEREO unnecessary */
+
+        case MPEG_SOUND_MONO:
+            val_ll = 0xc0000;
+            val_lr = 0xc0000;
+            val_rl = 0xc0000;
+            val_rr = 0xc0000;
+            break;
+
+        case MPEG_SOUND_CUSTOM:
+            {
+                /* fixed point variables (matching MAS internal format)
+                   integer part: upper 13 bits (inlcuding sign)
+                   fractional part: lower 19 bits */
+                long fp_width, fp_straight, fp_cross;
+                
+                fp_width = (stereo_width << 19) / 100;
+                if (stereo_width <= 100)
+                {
+                    fp_straight = - ((1<<19) + fp_width) / 2;
+                    fp_cross = fp_straight + fp_width;
+                }
+                else
+                {
+                    fp_straight = - (1<<19);
+                    fp_cross = ((2 * fp_width / (((1<<19) + fp_width) >> 10))
+                                << 9) - (1<<19);
+                }
+                val_ll = val_rr = fp_straight & 0xFFFFF;
+                val_lr = val_rl = fp_cross & 0xFFFFF;
+            }
+            break;
+
+        case MPEG_SOUND_MONO_LEFT:
+            val_ll = 0x80000;
+            val_lr = 0x80000;
+            val_rl = 0;
+            val_rr = 0;
+            break;
+
+        case MPEG_SOUND_MONO_RIGHT:
+            val_ll = 0;
+            val_lr = 0;
+            val_rl = 0x80000;
+            val_rr = 0x80000;
+            break;
+
+        case MPEG_SOUND_KARAOKE:
+            val_ll = 0x80001;
+            val_lr = 0x7ffff;
+            val_rl = 0x7ffff;
+            val_rr = 0x80001;
+            break;
+    }
+
+#if (CONFIG_HWCODEC == MAS3587F) || (CONFIG_HWCODEC == MAS3539F)
+    mas_writemem(MAS_BANK_D0, MAS_D0_OUT_LL, &val_ll, 1); /* LL */
+    mas_writemem(MAS_BANK_D0, MAS_D0_OUT_LR, &val_lr, 1); /* LR */
+    mas_writemem(MAS_BANK_D0, MAS_D0_OUT_RL, &val_rl, 1); /* RL */
+    mas_writemem(MAS_BANK_D0, MAS_D0_OUT_RR, &val_rr, 1); /* RR */
+#elif CONFIG_HWCODEC == MAS3507D
+    mas_writemem(MAS_BANK_D1, 0x7f8, &val_ll, 1); /* LL */
+    mas_writemem(MAS_BANK_D1, 0x7f9, &val_lr, 1); /* LR */
+    mas_writemem(MAS_BANK_D1, 0x7fa, &val_rl, 1); /* RL */
+    mas_writemem(MAS_BANK_D1, 0x7fb, &val_rr, 1); /* RR */
+#endif
+}
+#endif /* !SIMULATOR */
+
 #if (CONFIG_HWCODEC == MAS3587F) || (CONFIG_HWCODEC == MAS3539F)
 unsigned long mdb_shape_shadow = 0;
 unsigned long loudness_shadow = 0;
@@ -766,7 +853,14 @@ void mpeg_sound_set(int setting, int value)
             break;
 #endif            
         case SOUND_CHANNELS:
-            mpeg_sound_channel_config(value);
+            channel_configuration = value;
+            set_channel_config();
+            break;
+        
+        case SOUND_STEREO_WIDTH:
+            stereo_width = value;
+            if (channel_configuration == MPEG_SOUND_CUSTOM)
+                set_channel_config();
             break;
     }
 #endif /* SIMULATOR */
@@ -799,82 +893,6 @@ int mpeg_val2phys(int setting, int value)
 #endif
 }
 
-void mpeg_sound_channel_config(int configuration)
-{
-#ifdef SIMULATOR
-    (void)configuration;
-#else
-    unsigned long val_ll = 0x80000;
-    unsigned long val_lr = 0;
-    unsigned long val_rl = 0;
-    unsigned long val_rr = 0x80000;
-    
-    switch(configuration)
-    {
-        case MPEG_SOUND_STEREO:
-            val_ll = 0x80000;
-            val_lr = 0;
-            val_rl = 0;
-            val_rr = 0x80000;
-            break;
-
-        case MPEG_SOUND_MONO:
-            val_ll = 0xc0000;
-            val_lr = 0xc0000;
-            val_rl = 0xc0000;
-            val_rr = 0xc0000;
-            break;
-
-        case MPEG_SOUND_MONO_LEFT:
-            val_ll = 0x80000;
-            val_lr = 0x80000;
-            val_rl = 0;
-            val_rr = 0;
-            break;
-
-        case MPEG_SOUND_MONO_RIGHT:
-            val_ll = 0;
-            val_lr = 0;
-            val_rl = 0x80000;
-            val_rr = 0x80000;
-            break;
-
-        case MPEG_SOUND_STEREO_NARROW:
-            val_ll = 0xa0000;
-            val_lr = 0xe0000;
-            val_rl = 0xe0000;
-            val_rr = 0xa0000;
-            break;
-
-        case MPEG_SOUND_STEREO_WIDE:
-            val_ll = 0x80000;
-            val_lr = 0x40000;
-            val_rl = 0x40000;
-            val_rr = 0x80000;
-            break;
-
-        case MPEG_SOUND_KARAOKE:
-            val_ll = 0x80001;
-            val_lr = 0x7ffff;
-            val_rl = 0x7ffff;
-            val_rr = 0x80001;
-            break;
-    }
-
-#if (CONFIG_HWCODEC == MAS3587F) || (CONFIG_HWCODEC == MAS3539F)
-    mas_writemem(MAS_BANK_D0, MAS_D0_OUT_LL, &val_ll, 1); /* LL */
-    mas_writemem(MAS_BANK_D0, MAS_D0_OUT_LR, &val_lr, 1); /* LR */
-    mas_writemem(MAS_BANK_D0, MAS_D0_OUT_RL, &val_rl, 1); /* RL */
-    mas_writemem(MAS_BANK_D0, MAS_D0_OUT_RR, &val_rr, 1); /* RR */
-#else
-    mas_writemem(MAS_BANK_D1, 0x7f8, &val_ll, 1); /* LL */
-    mas_writemem(MAS_BANK_D1, 0x7f9, &val_lr, 1); /* LR */
-    mas_writemem(MAS_BANK_D1, 0x7fa, &val_rl, 1); /* RL */
-    mas_writemem(MAS_BANK_D1, 0x7fb, &val_rr, 1); /* RR */
-#endif
-#endif
-}
-
 #if (CONFIG_HWCODEC == MAS3587F) || (CONFIG_HWCODEC == MAS3539F)
 /* This function works by telling the decoder that we have another
    crystal frequency than we actually have. It will adjust its internal
@@ -901,7 +919,7 @@ void mpeg_set_pitch(int pitch)
 #endif
 
 void mp3_init(int volume, int bass, int treble, int balance, int loudness,
-              int avc, int channel_config,
+              int avc, int channel_config, int stereo_width,
               int mdb_strength, int mdb_harmonics,
               int mdb_center, int mdb_shape, bool mdb_enable,
               bool superbass)
@@ -914,6 +932,7 @@ void mp3_init(int volume, int bass, int treble, int balance, int loudness,
     (void)loudness;
     (void)avc;
     (void)channel_config;
+    (void)stereo_width;
     (void)mdb_strength;
     (void)mdb_harmonics;
     (void)mdb_center;
@@ -1015,8 +1034,6 @@ void mp3_init(int volume, int bass, int treble, int balance, int loudness,
 
     mas_writereg(MAS_REG_KPRESCALE, 0xe9400);
     dac_enable(true);
-
-    mpeg_sound_channel_config(channel_config);
 #endif
 
 #if (CONFIG_HWCODEC == MAS3587F) || (CONFIG_HWCODEC == MAS3539F)
@@ -1031,9 +1048,10 @@ void mp3_init(int volume, int bass, int treble, int balance, int loudness,
     mpeg_sound_set(SOUND_TREBLE, treble);
     mpeg_sound_set(SOUND_BALANCE, balance);
     mpeg_sound_set(SOUND_VOLUME, volume);
+    mpeg_sound_set(SOUND_CHANNELS, channel_config);
+    mpeg_sound_set(SOUND_STEREO_WIDTH, stereo_width);
     
 #if (CONFIG_HWCODEC == MAS3587F) || (CONFIG_HWCODEC == MAS3539F)
-    mpeg_sound_channel_config(channel_config);
     mpeg_sound_set(SOUND_LOUDNESS, loudness);
     mpeg_sound_set(SOUND_AVC, avc);
     mpeg_sound_set(SOUND_MDB_STRENGTH, mdb_strength);