diff --git a/csdr/__init__.py b/csdr/__init__.py
index 93c485a..61777f2 100644
--- a/csdr/__init__.py
+++ b/csdr/__init__.py
@@ -605,7 +605,7 @@ class Dsp(DirewolfConfigSubscriber):
         self.high_cut = high_cut
         if self.running:
             if self.pycsdr_chain is not None and isinstance(self.pycsdr_chain, DemodulatorChain):
-                self.pycsdr_chain.setBandpass(low_cut, high_cut)
+                self.pycsdr_chain.setBandpass(float(self.low_cut) / self.if_samp_rate(), float(self.high_cut) / self.if_samp_rate())
             else:
                 self.pipes["bpf_pipe"].write(
                     "%g %g\n" % (float(self.low_cut) / self.if_samp_rate(), float(self.high_cut) / self.if_samp_rate())
@@ -724,6 +724,9 @@ class Dsp(DirewolfConfigSubscriber):
 
             chain = self.chain(self.demodulator)
             if self.pycsdr_enabled and isinstance(chain, DemodulatorChain):
+                self.set_squelch_level(self.squelch_level)
+                self.set_bpf(self.low_cut, self.high_cut)
+                self.set_offset_freq(self.offset_freq)
                 chain.setInput(self.buffer)
                 self.output.send_output("audio", chain.getOutput().read)
                 return
diff --git a/csdr/chain/demodulator.py b/csdr/chain/demodulator.py
index 77c3cff..7286e63 100644
--- a/csdr/chain/demodulator.py
+++ b/csdr/chain/demodulator.py
@@ -19,7 +19,7 @@ class DemodulatorChain(Chain):
         self.decimation = FirDecimate(decimation, transition)
 
         bp_transition = 320.0 / if_samp_rate
-        self.bandpass = Bandpass(bp_transition, use_fft=True)
+        self.bandpass = Bandpass(transition=bp_transition, use_fft=True)
 
         self.squelch = Squelch(5)