diff --git a/ubitx_iop/audio.ino b/ubitx_iop/audio.ino
index ce6fbfd..9a66544 100644
--- a/ubitx_iop/audio.ino
+++ b/ubitx_iop/audio.ino
@@ -156,6 +156,8 @@ void RigAudio::init() const {
     mixRX.gain(i, 0.0);
     mixTX.gain(i, 0.0);
   }
+
+  audioEqualizer();
   
   USBDEBUG("audio initialization completed");
 }
@@ -723,6 +725,24 @@ void audioDigiFilter()
   audioCtrl.eqFilter(5, hpFilter);
 }
 */
+
+int eqFilter1[5];
+
+void audioEqualizer()
+{
+  audioCtrl.audioPreProcessorEnable();
+  audioCtrl.eqSelect(PARAMETRIC_EQUALIZER);
+  // calcBiquad(FilterType,FrequencyC,dBgain,Q,QuantizationUnit,SampleRate,int*);
+  calcBiquad(FILTER_PARAEQ, 2700, 6, 0.707, 524288, 44100, eqFilter1);
+//  calcBiquad(FILTER_HIPASS,  100, 0, 0.707, 524288, 44100, hpFilter);
+  audioCtrl.eqFilter(0, eqFilter1);
+//  audioCtrl.eqFilter(1, hpFilter);  
+//  audioCtrl.eqFilter(2, lpFilter);
+//  audioCtrl.eqFilter(3, hpFilter);
+//  audioCtrl.eqFilter(4, lpFilter);
+//  audioCtrl.eqFilter(5, hpFilter);
+}
+
 //======================================================================
 // EOF
 //======================================================================