diff --git a/README b/README
index bfa61e3..cf396aa 100644
--- a/README
+++ b/README
@@ -1,4 +1,4 @@
-Digital Speech Decoder 1.6.0
+Digital Speech Decoder 1.6.0 with P25 & DMR Filter
 Copyright (C) 2010 DSD Author
 GPG Key ID: 0x3F1D7FD0 (74EF 430D F7F2 0A48 FCE6  F630 FAA2 635D 3F1D 7FD0)
 
@@ -455,10 +455,12 @@ Decoder options
 	-fp           Decode only ProVoice*
 	-fr           Decode only DMR/MOTOTRBO
 	-fx           Decode only X2-TDMA
+	-l            Disable Filters (not recommended)
 	-ma           Auto-select modulation optimizations (default)
 	-mc           Use only C4FM modulation optimizations
 	-mg           Use only GFSK modulation optimizations
 	-mq           Use only QPSK modulation optimizations
+	-pu           Unmute Encrypted P25
 	-u <num>      Unvoiced speech quality (default=3)
 	-xx           Expect non-inverted X2-TDMA signal
 	-xr           Expect inverted DMR/MOTOTRBO signal
diff --git a/dsd.h b/dsd.h
index 2373a3a..f2ff8ea 100644
--- a/dsd.h
+++ b/dsd.h
@@ -93,6 +93,8 @@ typedef struct
   int msize;
   int playfiles;
   int delay;
+  int disable_filters;
+  int unmute_encrypted_p25;
 } dsd_opts;
 
 typedef struct
diff --git a/dsd_main.c b/dsd_main.c
index 9a12711..ec28d4c 100644
--- a/dsd_main.c
+++ b/dsd_main.c
@@ -128,6 +128,8 @@ initOpts (dsd_opts * opts)
   opts->msize = 15;
   opts->playfiles = 0;
   opts->delay = 0;
+  opts->disable_filters = 0;
+  opts->unmute_encrypted_p25 = 0;
 }
 
 void
@@ -262,10 +264,12 @@ usage ()
   printf ("  -fp           Decode only ProVoice*\n");
   printf ("  -fr           Decode only DMR/MOTOTRBO\n");
   printf ("  -fx           Decode only X2-TDMA\n");
+  printf ("  -l            Disable Filters (not recommended)\n");
   printf ("  -ma           Auto-select modulation optimizations (default)\n");
   printf ("  -mc           Use only C4FM modulation optimizations\n");
   printf ("  -mg           Use only GFSK modulation optimizations\n");
   printf ("  -mq           Use only QPSK modulation optimizations\n");
+  printf ("  -pu           Unmute Encrypted P25\n");
   printf ("  -u <num>      Unvoiced speech quality (default=3)\n");
   printf ("  -xx           Expect non-inverted X2-TDMA signal\n");
   printf ("  -xr           Expect inverted DMR/MOTOTRBO signal\n");
@@ -335,7 +339,7 @@ main (int argc, char **argv)
   char versionstr[25];
   mbe_printVersion (versionstr);
 
-  printf ("Digital Speech Decoder 1.6.0\n");
+  printf ("Digital Speech Decoder 1.6.0 with P25 & DMR Filter\n");
   printf ("mbelib version %s\n", versionstr);
 
   initOpts (&opts);
@@ -344,7 +348,7 @@ main (int argc, char **argv)
   exitflag = 0;
   signal (SIGINT, sigfun);
 
-  while ((c = getopt (argc, argv, "hep:qstv:z:i:o:d:g:nw:B:C:R:f:m:u:x:A:S:M:r")) != -1)
+  while ((c = getopt (argc, argv, "hep:qstv:z:i:o:d:g:nw:B:C:R:f:m:u:x:A:S:M:r:l")) != -1)
     {
       opterr = 0;
       switch (c)
@@ -373,6 +377,10 @@ main (int argc, char **argv)
             {
               opts.p25tg = 1;
             }
+          else if (optarg[0] == 'u')
+            {
+        	  opts.unmute_encrypted_p25 = 1;
+            }
           break;
         case 'q':
           opts.errorbars = 0;
@@ -649,6 +657,10 @@ main (int argc, char **argv)
           opts.datascope = 0;
           state.optind = optind;
           break;
+        case 'l':
+          opts.disable_filters = 1;
+          printf ("DMR & P25 Filter Disabled\n");
+          break;
         default:
           usage ();
           exit (0);
diff --git a/dsd_symbol.c b/dsd_symbol.c
index b8fd812..81aed25 100644
--- a/dsd_symbol.c
+++ b/dsd_symbol.c
@@ -80,7 +80,9 @@ getSymbol (dsd_opts * opts, dsd_state * state, int have_sync)
         }
 
       result = read (opts->audio_in_fd, &sample, 2);
-      {
+
+      if (opts->disable_filters == 0)
+        {
       	  #define NZEROS 60
 		  #define GAIN 7.423339364e+00
 
@@ -117,7 +119,8 @@ getSymbol (dsd_opts * opts, dsd_state * state, int have_sync)
 		  sum += (xcoeffs[i] * xv[i]);
 
 		  sample = sum / GAIN; // filtered sample out
-      }
+        }
+
       if ((sample > state->max) && (have_sync == 1) && (state->rf_mod == 0))
         {
           sample = state->max;
diff --git a/p25p1_ldu1.c b/p25p1_ldu1.c
index a8a2f2f..fd6abe8 100644
--- a/p25p1_ldu1.c
+++ b/p25p1_ldu1.c
@@ -77,7 +77,7 @@ processLDU1 (dsd_opts * opts, dsd_state * state)
           y++;
           z++;
         }
-      if (state->p25kid == 0)
+      if (state->p25kid == 0 || opts->unmute_encrypted_p25 == 1)
         {
           processMbeFrame (opts, state, imbe_fr, NULL, NULL);
         }
diff --git a/p25p1_ldu2.c b/p25p1_ldu2.c
index 85ba279..a0f8fbb 100644
--- a/p25p1_ldu2.c
+++ b/p25p1_ldu2.c
@@ -80,7 +80,7 @@ processLDU2 (dsd_opts * opts, dsd_state * state)
           y++;
           z++;
         }
-      if (state->p25kid == 0)
+      if (state->p25kid == 0 || opts->unmute_encrypted_p25 == 1)
         {
     	  processMbeFrame (opts, state, imbe_fr, NULL, NULL);
         }