sequencer states

sound-driver/psg.h

@@ -32,10 +32,20 @@ typedef enum {
   e_Null
 } t_note;
     
+#define e_Es e_Dis
+#define e_As e_Gis
+#define e_B e_Ais
+
 
 void psgInit();
+
 void psgPlayTone(uint8_t channel, t_octave octave, t_note note);
+void psgAmplitude(uint8_t channel, uint8_t volume);
+
+// low level
 void psgWriteFrequency(uint8_t channel, uint16_t frequencyCode);
+
+// very low level
 void psgWrite(uint8_t address, uint8_t data);
 uint8_t psgReadShadow(uint8_t address);