Index: apps/lang/english.lang
===================================================================
--- apps/lang/english.lang	(revision 20909)
+++ apps/lang/english.lang	(working copy)
@@ -12468,3 +12468,20 @@
     *: "Prevent Track Skipping"
   </voice>
 </phrase>
+<phrase>
+  id: LANG_COMPRESSION
+  desc: in sound settings
+  user: core
+  <source>
+    *: none
+    swcodec: "Compression"
+  </source>
+  <dest>
+    *: none
+    swcodec: "Compression"
+  </dest>
+  <voice>
+    *: none
+    swcodec: "Compression"
+  </voice>
+</phrase>
Index: apps/settings.c
===================================================================
--- apps/settings.c	(revision 20909)
+++ apps/settings.c	(working copy)
@@ -936,6 +936,7 @@
     }
 
     dsp_dither_enable(global_settings.dithering_enabled);
+    dsp_set_compression_level(global_settings.compression_level);
 #endif
 
 #ifdef HAVE_SPDIF_POWER
Index: apps/settings.h
===================================================================
--- apps/settings.h	(revision 20909)
+++ apps/settings.h	(working copy)
@@ -731,6 +731,10 @@
     int touch_mode;
 #endif
 
+#if CONFIG_CODEC == SWCODEC
+    int compression_level;
+#endif
+
     /* If values are just added to the end, no need to bump plugin API
        version. */
     /* new stuff to be added at the end */
Index: apps/menus/sound_menu.c
===================================================================
--- apps/menus/sound_menu.c	(revision 20909)
+++ apps/menus/sound_menu.c	(working copy)
@@ -89,6 +89,10 @@
               
     MENUITEM_SETTING(dithering_enabled,
                      &global_settings.dithering_enabled, lowlatency_callback);
+                     
+    MENUITEM_SETTING(compression_level,
+                     &global_settings.compression_level, lowlatency_callback);
+
 #endif
 
 #if (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F)
@@ -121,6 +125,7 @@
           &balance,&channel_config,&stereo_width
 #if CONFIG_CODEC == SWCODEC
          ,&crossfeed_menu, &equalizer_menu, &dithering_enabled
+         ,&compression_level
 #endif
 #if (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F)
          ,&loudness,&avc,&superbass,&mdb_enable,&mdb_strength
Index: apps/dsp.c
===================================================================
--- apps/dsp.c	(revision 20909)
+++ apps/dsp.c	(working copy)
@@ -217,6 +217,8 @@
 static long album_peak;
 static long replaygain;
 static bool crossfeed_enabled;
+static bool compression_enabled;
+static float compression_gain;
 
 #define audio_dsp (dsp_conf[CODEC_IDX_AUDIO])
 #define voice_dsp (dsp_conf[CODEC_IDX_VOICE])
@@ -1405,3 +1407,10 @@
     replaygain = gain;
     set_gain(&audio_dsp);
 }
+
+void dsp_set_compression_level(int compression_level)
+/* initializes compression */
+{
+    compression_gain = compression_level / 10.0;
+    compression_enabled = (compression_level > 0);
+}
Index: apps/dsp.h
===================================================================
--- apps/dsp.h	(revision 20909)
+++ apps/dsp.h	(working copy)
@@ -26,6 +26,9 @@
 #include <stdbool.h>
 
 #define NATIVE_FREQUENCY       44100
+
+#define MAX_COMPRESSION_GAIN   200  /* 20 dB */
+
 enum
 {
     STEREO_INTERLEAVED = 0,
@@ -164,5 +167,6 @@
 int sound_get_pitch(void);
 int dsp_callback(int msg, intptr_t param);
 void dsp_dither_enable(bool enable);
+void dsp_set_compression_level(int compression_level);
 
 #endif
Index: apps/settings_list.c
===================================================================
--- apps/settings_list.c	(revision 20909)
+++ apps/settings_list.c	(working copy)
@@ -1181,6 +1181,13 @@
     /* dithering */
     OFFON_SETTING(F_SOUNDSETTING, dithering_enabled, LANG_DITHERING, false,
                   "dithering enabled", dsp_dither_enable),
+
+    /* compression */
+    INT_SETTING_NOWRAP(F_SOUNDSETTING, compression_level,
+                       LANG_COMPRESSION, 0,
+                       "compression level", UNIT_DB, 0, MAX_COMPRESSION_GAIN,
+                       5, db_format, get_dec_talkid, dsp_set_compression_level),
+
 #endif
 #ifdef HAVE_WM8758
     SOUND_SETTING(F_NO_WRAP, bass_cutoff, LANG_BASS_CUTOFF,