diff --git a/csdr/chain/__init__.py b/csdr/chain/__init__.py
index 7994c976..21b69c9b 100644
--- a/csdr/chain/__init__.py
+++ b/csdr/chain/__init__.py
@@ -1,11 +1,11 @@
+from csdr.module import Module
 from pycsdr.modules import Buffer
 from typing import Union, Callable
 
 
-class Chain:
+class Chain(Module):
     def __init__(self, workers):
-        self.reader = None
-        self.writer = None
+        super().__init__()
         self.clientReader = None
         self.workers = workers
         for i in range(1, len(self.workers)):
@@ -23,14 +23,14 @@ class Chain:
     def setReader(self, reader):
         if self.reader is reader:
             return
-        self.reader = reader
+        super().setReader(reader)
         if self.workers:
             self.workers[0].setReader(reader)
 
     def setWriter(self, writer):
         if self.writer is writer:
             return
-        self.writer = writer
+        super().setWriter(writer)
         if self.workers:
             self.workers[-1].setWriter(writer)
 
diff --git a/csdr/module.py b/csdr/module.py
new file mode 100644
index 00000000..5783cce0
--- /dev/null
+++ b/csdr/module.py
@@ -0,0 +1,14 @@
+import pycsdr.modules
+
+
+class Module(pycsdr.modules.Module):
+    def __init__(self):
+        self.reader = None
+        self.writer = None
+        super().__init__()
+
+    def setReader(self, reader: pycsdr.modules.Reader) -> None:
+        self.reader = reader
+
+    def setWriter(self, writer: pycsdr.modules.Writer) -> None:
+        self.writer = writer
diff --git a/owrx/audio/chopper.py b/owrx/audio/chopper.py
index ca74a542..d9b7508a 100644
--- a/owrx/audio/chopper.py
+++ b/owrx/audio/chopper.py
@@ -4,7 +4,7 @@ import threading
 from owrx.audio import ProfileSourceSubscriber
 from owrx.audio.wav import AudioWriter
 from owrx.audio.queue import QueueJob
-from csdr.chain import Chain
+from csdr.module import Module
 import pickle
 
 import logging
@@ -13,7 +13,7 @@ logger = logging.getLogger(__name__)
 logger.setLevel(logging.INFO)
 
 
-class AudioChopper(threading.Thread, Chain, ProfileSourceSubscriber):
+class AudioChopper(threading.Thread, Module, ProfileSourceSubscriber):
     # TODO parser typing
     def __init__(self, mode_str: str, parser):
         self.parser = parser
@@ -25,7 +25,7 @@ class AudioChopper(threading.Thread, Chain, ProfileSourceSubscriber):
             raise ValueError("Mode {} is not an audio chopper mode".format(mode_str))
         self.profile_source = mode.get_profile_source()
         super().__init__()
-        Chain.__init__(self, [])
+        Module.__init__(self)
 
     def stop_writers(self):
         while self.writers: