diff --git a/fsk_rx.grc b/fsk_rx.grc
index 07acf9f..9ef913b 100644
--- a/fsk_rx.grc
+++ b/fsk_rx.grc
@@ -167,7 +167,7 @@
     </param>
     <param>
       <key>value</key>
-      <value>48000</value>
+      <value>8*audio_rate</value>
     </param>
   </block>
   <block>
@@ -221,7 +221,7 @@
     </param>
     <param>
       <key>value</key>
-      <value>samp_rate/4</value>
+      <value>38.2e3</value>
     </param>
   </block>
   <block>
@@ -290,11 +290,11 @@
     </param>
     <param>
       <key>value</key>
-      <value>1</value>
+      <value>-1400</value>
     </param>
     <param>
       <key>_enabled</key>
-      <value>True</value>
+      <value>1</value>
     </param>
     <param>
       <key>_coordinate</key>
@@ -318,11 +318,11 @@
     </param>
     <param>
       <key>max</key>
-      <value>100</value>
+      <value>2000</value>
     </param>
     <param>
       <key>min</key>
-      <value>0</value>
+      <value>-2000</value>
     </param>
     <param>
       <key>notebook</key>
@@ -330,7 +330,7 @@
     </param>
     <param>
       <key>num_steps</key>
-      <value>100</value>
+      <value>20</value>
     </param>
     <param>
       <key>style</key>
@@ -353,7 +353,7 @@
     </param>
     <param>
       <key>_enabled</key>
-      <value>True</value>
+      <value>1</value>
     </param>
     <param>
       <key>_coordinate</key>
@@ -404,11 +404,11 @@
     </param>
     <param>
       <key>freq</key>
-      <value>f_offset</value>
+      <value>f_offset + variable_slider_0</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(184, 340)</value>
+      <value>(176, 484)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -592,6 +592,65 @@
       <value>1</value>
     </param>
   </block>
+  <block>
+    <key>blocks_file_source</key>
+    <param>
+      <key>begin_tag</key>
+      <value>pmt.PMT_NIL</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>comment</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>file</key>
+      <value>/media/jens/Big Disk/gqrx_20190109_160212_466268999_2000000_pocsag.raw</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(120, 220)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>id</key>
+      <value>blocks_file_source_0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>complex</value>
+    </param>
+    <param>
+      <key>repeat</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>vlen</key>
+      <value>1</value>
+    </param>
+  </block>
   <block>
     <key>blocks_float_to_uchar</key>
     <param>
@@ -729,6 +788,57 @@
       <value>audio_rate</value>
     </param>
   </block>
+  <block>
+    <key>blocks_wavfile_source</key>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>comment</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>file</key>
+      <value>/home/jens/pocsag_004.wav</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(920, 588)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>id</key>
+      <value>blocks_wavfile_source_0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>nchan</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>repeat</key>
+      <value>True</value>
+    </param>
+  </block>
   <block>
     <key>jay_garage</key>
     <param>
@@ -2153,11 +2263,11 @@
     </param>
     <param>
       <key>_enabled</key>
-      <value>1</value>
+      <value>0</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(136, 220)</value>
+      <value>(120, 316)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -2340,7 +2450,7 @@
     </param>
     <param>
       <key>_enabled</key>
-      <value>1</value>
+      <value>0</value>
     </param>
     <param>
       <key>fft_size</key>
@@ -2538,7 +2648,7 @@
     </param>
     <param>
       <key>_enabled</key>
-      <value>1</value>
+      <value>0</value>
     </param>
     <param>
       <key>_coordinate</key>
@@ -2617,6 +2727,12 @@
     <source_key>0</source_key>
     <sink_key>1</sink_key>
   </connection>
+  <connection>
+    <source_block_id>blocks_file_source_0</source_block_id>
+    <sink_block_id>blocks_multiply_xx_0</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
   <connection>
     <source_block_id>blocks_float_to_uchar_0</source_block_id>
     <sink_block_id>blocks_file_sink_0_0</sink_block_id>
@@ -2641,6 +2757,24 @@
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
+  <connection>
+    <source_block_id>blocks_wavfile_source_0</source_block_id>
+    <sink_block_id>audio_sink_0</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>blocks_wavfile_source_0</source_block_id>
+    <sink_block_id>blocks_wavfile_sink_1</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>blocks_wavfile_source_0</source_block_id>
+    <sink_block_id>jay_garage_0</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
   <connection>
     <source_block_id>jay_garage_0</source_block_id>
     <sink_block_id>blocks_float_to_uchar_0</sink_block_id>