Small fixes for EQ.

MicroDexed.ino

@@ -2438,7 +2438,7 @@ void generate_version_string(char* buffer, uint8_t len)
   strncat(buffer, "-3.6", 4);
 #elif defined(TEENSY4_0)
   strncat(buffer, "-4.0", 4);
-#elif defined(TEENSY4_0)
+#elif defined(TEENSY4_1)
   strncat(buffer, "-4.1", 4);
 #endif
 #if defined(USE_FX)

UI.hpp

@@ -8641,7 +8641,7 @@ void UI_func_eq_1(uint8_t param)
       }
     }
     lcd_display_meter_int("EQ Low-Cut [Hz]", configuration.fx.eq_1, 1.0, 0.0, EQ_1_MIN, EQ_1_MAX, 3, false, false, true);
-    sgtl5000.setEQFc(1, mapfloat(configuration.fx.eq_1, EQ_1_MIN, EQ_1_MAX, 15, 250));
+    sgtl5000.setEQFc(1, configuration.fx.eq_1);
     sgtl5000.setEQGain(1, 6.0);
     sgtl5000.commitFilter(1);
 #ifdef DEBUG
@@ -8930,7 +8930,7 @@ void UI_func_eq_7(uint8_t param)
       }
     }
     lcd_display_meter_float("EQ High-Cut[kHz]", configuration.fx.eq_7, 1.0, 0.0, EQ_7_MIN, EQ_7_MAX, 3, 1, false, false, true);
-    sgtl5000.setEQFc(7, mapfloat(configuration.fx.eq_7, EQ_7_MIN, EQ_7_MAX, EQ_7_MIN * 1000.0, EQ_7_MAX * 1000.0));
+    sgtl5000.setEQFc(7, configuration.fx.eq_7);
     sgtl5000.commitFilter(7);
 #ifdef DEBUG
     sgtl5000.show_params(7);

control_sgtl5000plus.cpp

@@ -128,17 +128,16 @@ void AudioControlSGTL5000Plus::setEQQ(uint8_t band, float q)
   }
 }
 
-/*
 // Calculate Q: http://www.sengpielaudio.com/calculator-bandwidth.htm
-  void setEQBandwidth(uint8_t band, float bw)
+//              http://jdm12.ch/Audio/EQ_BPF-Q-bandwidth.asp
+void AudioControlSGTL5000Plus::setEQBandwidth(uint8_t band, float bw)
 {
   if (Q && Fc && _enabled == true)
   {
     band = constrain(band, 1, num_bands);
-  //Q[band - 1] = ;
+    Q[band - 1] = sqrt(pow(2, bw)) / (pow(2, bw) - 1);
   }
 }
-*/
 
 void AudioControlSGTL5000Plus::setEQGain(uint8_t band, float gain)
 {

control_sgtl5000plus.h

@@ -65,7 +65,7 @@ class AudioControlSGTL5000Plus : public AudioControlSGTL5000
     void setEQType(uint8_t band, uint8_t ft);
     void setEQFc(uint8_t band, float frq);
     void setEQQ(uint8_t band, float q);
-    //void setEQBandwidth(uint8_t band, float bw);
+    void setEQBandwidth(uint8_t band, float bw);
     void setEQGain(uint8_t band, float gain);
     void commitFilter(uint8_t band);
     void show_params(uint8_t band);