Rp2040.ino

#include <hardware/pwm.h>
#define MODESWITCH_PIN_A 0
#define MODESWITCH_PIN_B 1
#define PUSHBUTTON_PIN 6
#define VOCT_PIN 26
#define FREQ_POT_PIN 27
#define INVERSION_PIN 28
#define CHORD_POT_PIN 29

// 0-4=chord osc , 5=bass osc , 6=arpeggio osc
float osc_progress[6];
int osc_inverse[4];
float osc_scale_rate[5]; // 0~3=chord osc , 6=arpeggio osc
int slice_num = 0;
float osc_freq = 0;
int wavetable[256]; // 1024 resolution , 256 rate
float calb = 1.11; // calibration for reduce resistance error
int  adc, freq_pot;
int waveform_selection = 0;
int f0 = 35; // base osc frequency

int j = 0;
int select_mode = 0; // 0=chord without root , 1=chord with root,2=arpeggio
int inversion = 0; // 0-7
int old_invAD = 0; // countermeasure of input ADC noise
int new_invAD = 0; // countermeasure of input ADC noise
bool push_sw, old_push_sw;//push sw

int qnt[32];
int thr=0; // threshold number

// Quantization values for the Major Scale
const static int majqnt[32]={
0,  34, 68, 85, 119,  153,  205,  239,  273,  290,  324,  358,  409,  443,  477,  494,  529,  563,  614,  648,  682,  699,  733,  767,  818,  853,  887,  904,  938,  972,  1023
};
// Quantizer Threshold values for the Major Scale
const static int majthr[32]={
 0, 17, 51, 85, 102,  136,  171,  222,  256,  290,  307,  341,  375,  426,  460,  494,  512,  546,  580,  631,  665,  699,  716,  750,  784,  835,  870,  904,  921,  955,  989,1024
};

// Quantization values for the Minor Scale
const static int minqnt[32]={
0,  34, 51, 85, 119,  136,  205,  239,  256,  290,  324,  341,  409,  443,  460,  494,  529,  546,  614,  648,  665,  699,  733,  750,  818,  853,  870,  904,  938,  955,  1023
};
// Quantizer Threshold values for the Minor Scale
const static int minthr[32]={
 17,  43, 68, 102,  128,  171,  222,  248,  273,  307,  333,  375,  426,  452,  477,  512,  538,  580,  631,  657,  682,  716,  742,  784,  836,  862,  887,  921,  947,  989,  1024
};

//------------chord------------
float freq_rate[61]={
1,  1.059,  1.122,  1.189,  1.26, 1.335,  1.414,  1.498,  1.587,  1.682,  1.782,  1.888,  2,  2.059,  2.122,  2.189,  2.26, 2.335,  2.414,  2.498,  2.587,  2.682,  2.782,  2.888,  3,  3.059,  3.122,  3.189,  3.26, 3.335,  3.414,  3.498,  3.587,  3.682,  3.782,  3.888,  4,  4.059,  4.122,  4.189,  4.26, 4.335,  4.414,  4.498,  4.587,  4.682,  4.782,  4.888,  5,  5.059,  5.122,  5.189,  5.26, 5.335,  5.414,  5.498,  5.587,  5.682,  5.782,  5.888,  6
};

int chord_mode = 2;//0=maj 3chord,1=min 3chord,2=tension maj 4chord,3=maj 4chord,4=min 4chord,5=tension min 4chord

int chord_3[3][3]={
{0,4,7},//maj
{0,3,7},//min
{0,3,6}//dim
};

int chord_4[6][4]={
  {0,4,7,11},//maj+M7
  {0,2,4,7},//maj+add9
  {0,4,7,10},//maj+7
  {0,3,7,10},//min+7
  {0,4,7,9},//maj+6
  {0,3,6,10}//dim+7
};