Added string getter function as a test for comp_gain.

MicroMDAEPiano.ino

@@ -179,6 +179,7 @@ void setup()
   sgtl5000_1.dacVolume(1.0);
   //sgtl5000_1.dacVolumeRampLinear();
   sgtl5000_1.unmuteHeadphone();
+  sgtl5000_1.volume(0.5, 0.5); // Headphone volume
   sgtl5000_1.unmuteLineout();
   //sgtl5000_1.autoVolumeDisable(); // turn off AGC
   sgtl5000_1.lineOutLevel(SGTL5000_LINEOUT_LEVEL);

UI.hpp

@@ -102,6 +102,29 @@ extern AudioMixer4 mixer_l;
 extern AudioAmplifier volume_r;
 extern AudioAmplifier volume_l;
 
+/******************************************
+   TEXT GETTER FUCTIONS
+ ******************************************/
+const char comp_gain_value_text1[] = "  0 dB";
+const char comp_gain_value_text2[] = "+ 6 dB";
+const char comp_gain_value_text3[] = "+12 dB";
+
+char* get_comp_gain_value_text(void)
+{
+  switch (configuration.comp_gain)
+  {
+    case 0:
+      return (comp_gain_value_text1);
+      break;
+    case 1:
+      return (comp_gain_value_text2);
+      break;
+    case 2:
+      return (comp_gain_value_text3);
+      break;
+  }
+}
+
 /******************************************
    MAIN MENU
  ******************************************/
@@ -327,7 +350,8 @@ LiquidMenu overdrive_menu(lcd);
 #define NUM_COMP_GAIN_MENUS 1
 const char comp_gain_text1[] PROGMEM = "Comp. Gain";
 LiquidLine comp_gain_line1(1, 0, comp_gain_text1);
-LiquidLine comp_gain_line2(1, 1, configuration.comp_gain);
+//LiquidLine comp_gain_line2(1, 1, configuration.comp_gain);
+LiquidLine comp_gain_line2(1, 1, get_comp_gain_value_text);
 LiquidScreen comp_gain_screen;
 LiquidMenu comp_gain_menu(lcd);
 
@@ -1075,7 +1099,7 @@ void callback_info_function()
 }
 
 /******************************************
-   HELPER FUCTIONS
+   HELPER MENU FUNCTION
  ******************************************/
  
 float mapfloat(float val, float in_min, float in_max, float out_min, float out_max)
@@ -1132,6 +1156,9 @@ void goto_system_menu(void)
   enc[RIGHT_ENCODER].write(menu_position[SYSTEM], 0, NUM_SYSTEM_MENUS - 1);
 }
 
+/******************************************
+   INIT MENU FUNCTION
+ ******************************************/
 void init_menus(void)
 {
   uint8_t i;

config.h

@@ -76,7 +76,28 @@
 //*************************************************************************************************
 
 // Teensy Audio Shield:
-#define SGTL5000_LINEOUT_LEVEL 29
+/* Values for SGTL5000_LINEOUT_LEVEL
+  13: 3.16 Volts p-p
+  14: 2.98 Volts p-p
+  15: 2.83 Volts p-p
+  16: 2.67 Volts p-p
+  17: 2.53 Volts p-p
+  18: 2.39 Volts p-p
+  19: 2.26 Volts p-p
+  20: 2.14 Volts p-p
+  21: 2.02 Volts p-p
+  22: 1.91 Volts p-p
+  23: 1.80 Volts p-p
+  24: 1.71 Volts p-p
+  25: 1.62 Volts p-p
+  26: 1.53 Volts p-p
+  27: 1.44 Volts p-p
+  28: 1.37 Volts p-p
+  29: 1.29 Volts p-p  (default)
+  30: 1.22 Volts p-p
+  31: 1.16 Volts p-p
+*/
+#define SGTL5000_LINEOUT_LEVEL 24
 //#define SDCARD_CS_PIN    10
 //#define SDCARD_MOSI_PIN  7
 //#define SDCARD_SCK_PIN   14