diff --git a/IO.h b/IO.h
index 25559c7..339b4ac 100644
--- a/IO.h
+++ b/IO.h
@@ -60,12 +60,14 @@ private:
   CSampleRB            m_txBuffer;
   CRSSIRB              m_rssiBuffer;
 
-  arm_fir_instance_q15 m_C4FSKFilter;
-  arm_fir_instance_q15 m_GMSKFilter;
-  arm_fir_instance_q15 m_P25Filter;
-  q15_t                m_C4FSKState[70U];    // NoTaps + BlockSize - 1, 42 + 20 - 1 plus some spare
-  q15_t                m_GMSKState[40U];     // NoTaps + BlockSize - 1, 12 + 20 - 1 plus some spare
-  q15_t                m_P25State[30U];      // NoTaps + BlockSize - 1, 6 + 20 - 1 plus some spare
+  arm_fir_instance_q15 m_rrcFilter;
+  arm_fir_instance_q15 m_rcFilter;
+  arm_fir_instance_q15 m_gaussianFilter;
+  arm_fir_instance_q15 m_boxcarFilter;
+  q15_t                m_rrcState[70U];           // NoTaps + BlockSize - 1, 42 + 20 - 1 plus some spare
+  q15_t                m_rcState[70U];            // NoTaps + BlockSize - 1, 42 + 20 - 1 plus some spare
+  q15_t                m_gaussianState[40U];      // NoTaps + BlockSize - 1, 12 + 20 - 1 plus some spare
+  q15_t                m_boxcarState[30U];        // NoTaps + BlockSize - 1, 6 + 20 - 1 plus some spare
 
   bool                 m_pttInvert;
   q15_t                m_rxLevel;