diff --git a/python/radio.py b/python/radio.py
index 0268b33..8f50533 100644
--- a/python/radio.py
+++ b/python/radio.py
@@ -141,7 +141,12 @@ class modes_radio (gr.top_block, pubsub):
     else:
         self._rx_rate = rate
     self._rx_path.set_rate(self._rx_rate)
-    return self._u.set_rate(rate) if self.live_source() else 0
+    if self._options.source in ("osmocom"):
+        return self._u.set_sample_rate(rate)
+    if self._options.source in ("uhd"):
+        return self._u.set_rate(rate)
+    else:
+        return 0
 
   def set_threshold(self, threshold):
     self._rx_path.set_threshold(threshold)
diff --git a/python/rx_path.py b/python/rx_path.py
index f948b97..b89ff2d 100644
--- a/python/rx_path.py
+++ b/python/rx_path.py
@@ -65,13 +65,13 @@ class rx_path(gr.hier_block2):
         self.connect(self._sync, self._slicer)
 
     def set_rate(self, rate):
-        self._sync.set_rate(rate)
+        self._sync.set_rate(int(rate))
         self._spc = int(rate/2e6)
         self._avg.set_length_and_scale(48*self._spc, 1.0/(48*self._spc))
         if self._bb != self._demod:
             self._pmf.set_length_and_scale(self._spc, 1.0/self._spc)
-        if self._dcblock is not None:
-            self._dcblock.set_length(100*self._spc)
+#        if self._dcblock is not None:
+#            self._dcblock.set_length(100*self._spc)
 
     def set_threshold(self, threshold):
         self._sync.set_threshold(threshold)