diff --git a/gr-jay/grc/jay_peak_detect.xml b/gr-jay/grc/jay_peak_detect.xml
index 81a55d0..11cf225 100644
--- a/gr-jay/grc/jay_peak_detect.xml
+++ b/gr-jay/grc/jay_peak_detect.xml
@@ -4,27 +4,54 @@
   <key>jay_peak_detect</key>
   <category>[jay]</category>
   <import>import jay</import>
-  <make>jay.peak_detect($alpha_s, $alpha_m, $vlen)</make>
+  <make>jay.peak_detect($vlen, $framerate, $peak_height_min, $peak_width_min, $peak_width_max, $alpha_s, $alpha_m)</make>
   <!-- Make one 'param' node for every Parameter you want settable from the GUI.
        Sub-nodes:
        * name
        * key (makes the value accessible as $keyname, e.g. in the make node)
        * type -->
   <param>
-    <name>Alpha short</name>
-    <key>alpha_s</key>
-    <type>float</type>
-  </param>
-  <param>
-    <name>Alpha medium</name>
-    <key>alpha_m</key>
-    <type>float</type>
-  </param>
-  <param>
-    <name>Vector length</name>
+    <name>Vector Length</name>
     <key>vlen</key>
+    <value>1024</value>
     <type>int</type>
   </param>
+  <param>
+    <name>Frame Rate</name>
+    <key>framerate</key>
+    <value>30</value>
+    <type>float</type>
+  </param>
+  <param>
+    <name>Peak Height Minimum [dB]</name>
+    <key>peak_height_min</key>
+    <value>20</value>
+    <type>float</type>
+  </param>
+  <param>
+    <name>Peak Width Minimum [samples]</name>
+    <key>peak_width_min</key>
+    <value>5</value>
+    <type>int</type>
+  </param>
+  <param>
+    <name>Peak Width Maximum [samples]</name>
+    <key>peak_width_max</key>
+    <value>37</value>
+    <type>int</type>
+  </param>
+  <param>
+    <name>Alpha Short</name>
+    <key>alpha_s</key>
+    <value>0.4</value>
+    <type>float</type>
+  </param>
+  <param>
+    <name>Alpha Medium</name>
+    <key>alpha_m</key>
+    <value>0.04</value>
+    <type>float</type>
+  </param>
 
   <!-- Make one 'sink' node per input. Sub-nodes:
        * name (an identifier for the GUI)
diff --git a/gr-jay/include/jay/peak_detect.h b/gr-jay/include/jay/peak_detect.h
index 01cc674..5841616 100644
--- a/gr-jay/include/jay/peak_detect.h
+++ b/gr-jay/include/jay/peak_detect.h
@@ -46,7 +46,7 @@ namespace gr {
        * class. jay::peak_detect::make is the public interface for
        * creating new instances.
        */
-      static sptr make(float alpha_s, float alpha_l, int vlen);
+      static sptr make(int vlen, float framerate, float peak_height_min, int peak_width_min, int peak_width_max, float alpha_s, float alpha_m);
     };
 
   } // namespace jay
diff --git a/gr-jay/lib/peak_detect_impl.cc b/gr-jay/lib/peak_detect_impl.cc
index d584dbb..c63da45 100644
--- a/gr-jay/lib/peak_detect_impl.cc
+++ b/gr-jay/lib/peak_detect_impl.cc
@@ -29,19 +29,23 @@ namespace gr {
   namespace jay {
 
     peak_detect::sptr
-    peak_detect::make(float alpha_s, float alpha_m, int vlen)
+    peak_detect::make(int vlen, float framerate, float peak_height_min, int peak_width_min, int peak_width_max, float alpha_s, float alpha_m)
     {
       return gnuradio::get_initial_sptr
-        (new peak_detect_impl(alpha_s, alpha_m, vlen));
+        (new peak_detect_impl(vlen, framerate, peak_height_min, peak_width_min, peak_width_max, alpha_s, alpha_m));
     }
 
     /*
      * The private constructor
      */
-    peak_detect_impl::peak_detect_impl(float alpha_s, float alpha_m, int vlen)
+    peak_detect_impl::peak_detect_impl(int vlen, float framerate, float peak_height_min, int peak_width_min, int peak_width_max, float alpha_s, float alpha_m)
 		: gr::sync_block("peak_detect"
 		, gr::io_signature::make(1, 1, vlen*sizeof(float))
         , gr::io_signature::make(1, 1, vlen*sizeof(float)))
+		, m_framerate (framerate)
+		, m_peak_height_min (peak_height_min)
+		, m_peak_width_min (peak_width_min)
+		, m_peak_width_max (peak_width_max)
 		, m_alpha_s (alpha_s)
 		, m_alpha_m(alpha_m)
 		, m_frameCount(0)
@@ -200,7 +204,7 @@ namespace gr {
 			// Create peak list
 			// -----------------------------------------------------------------
 			// Find peak candidates by thresholding
-			threshold(m_pPeakData, m_pXd, nitems_per_block, 20.f);
+			threshold(m_pPeakData, m_pXd, nitems_per_block, m_peak_height_min);
 			int numPeaks = findPeakPos(m_pPeakPos, m_pPeakData, nitems_per_block);
 			
 			// -----------------------------------------------------------------
@@ -318,9 +322,9 @@ namespace gr {
 					pbh = std::max(pbh_left, pbh_right);
 
 					// Ensure peak box is at least pb_min
-					pbh = std::max(pbh, PB_MIN);
+					pbh = std::max(pbh, m_peak_width_min);
 					
-					if (pbh > PB_MAX)
+					if (pbh > m_peak_width_max)
 					{
 						pbh = 0;
 						break;
diff --git a/gr-jay/lib/peak_detect_impl.h b/gr-jay/lib/peak_detect_impl.h
index 273df42..a3f0f5b 100644
--- a/gr-jay/lib/peak_detect_impl.h
+++ b/gr-jay/lib/peak_detect_impl.h
@@ -44,6 +44,10 @@ namespace jay {
 		  
 		};
 		
+		float m_framerate;
+		float m_peak_height_min;
+		int m_peak_width_min;
+		int m_peak_width_max;
 		float m_alpha_s;
 		float m_alpha_m;
 		float *m_pPeakData;
@@ -57,11 +61,8 @@ namespace jay {
 		uint64_t m_frameCount;
 		pmt::pmt_t m_tag_id;
 		
-		const int PB_MIN = 5;
-		const int PB_MAX = 37;
-
 	public:
-		peak_detect_impl(float alpha_s, float alpha_m, int vlen);
+		peak_detect_impl(int vlen, float framerate, float peak_height_min, int peak_width_min, int peak_width_max, float alpha_s, float alpha_m);
 		~peak_detect_impl();
 
 		// Where all the action really happens