Merge pull request #603 from ahnlak/unicorn-volume-fix

Unicorn volume fix

libraries/galactic_unicorn/galactic_unicorn.cpp

@@ -517,6 +517,7 @@ namespace pimoroni {
     value = value < 0.0f ? 0.0f : value;
     value = value > 1.0f ? 1.0f : value;
     this->volume = floor(value * 255.0f);
+    this->synth.volume = this->volume * 255.0f;
   }
 
   float GalacticUnicorn::get_volume() {

libraries/pico_synth/pico_synth.hpp

@@ -106,7 +106,7 @@ namespace pimoroni {
 
   class PicoSynth {
   public:
-    const uint16_t volume = 0x2fff;
+    uint16_t volume = 0x2fff;
 
     static const uint CHANNEL_COUNT = 8;
     AudioChannel channels[CHANNEL_COUNT];