cleanup include paths

src/synth/Oscillator.h

@@ -11,6 +11,8 @@
     #define M_PI 3.14159265358979323846
 #endif
 
+// TODO: if the amount of notes per octave is changed via config then this constant needs to be calculated at startup
+// as SYNTH_Xth_ROOT_TWO
 #define SYNTH_TWELFTH_ROOT_TWO 1.05946309435929526463
 
 // TODO: you get it, also in a yml config