diff --git a/src/binarystreamreader.h b/src/binarystreamreader.h
--- a/src/binarystreamreader.h
+++ b/src/binarystreamreader.h
@@ -36,7 +36,6 @@ class BinaryStreamReader : public Abstra
 public:
     explicit BinaryStreamReader(QIODevice* device, QObject *parent = 0);
     QWidget* settingsWidget();
-    unsigned numChannels() const;
     void enable(bool enabled = true);
     /// Stores settings into a `QSettings`
     void saveSettings(QSettings* settings);
@@ -45,7 +44,6 @@ public:
 
 private:
     BinaryStreamReaderSettings _settingsWidget;
-    unsigned _numChannels;
     unsigned sampleSize;
     bool skipByteRequested;
     bool skipSampleRequested;