My proof of concept to build an electronic chanter for less than 4 euros.
It uses a Lolin32 Lite and a buzzer. (No libraries needed)
(Some wires, thumbtacks and a PVC tube.)
Plays accidentals (false fingering)
Vibrato
Has serial console debugging
Need other frequencies? Just edit the source.
CODE
int prevnote = 0;
// Note freq table
int ha = 880;
int hg = 783;
int fs = 739;
int f = 698;
int e = 659;
int d = 587;
int cs = 554;
int c = 523;
int b = 493;
int as = 466;
int la = 440;
int lg = 391;
int mute = 0;
// 8 Bits to note, luckly not 9 fingers :)
// 0 (00000000) = all fingers off = mute
// bottom hand top hand
// 0111 011
// 1
// 01110111 = 119 = E
// 255 (11111111) = all fingers on = lg
// below per 10 all 255 posibilities
// Look at position 175
// custom frequency to get vibrato on D
// using bottom hand middle finger.
int data[] = {
mute,hg,ha,fs,ha,hg,ha,e,ha,hg,ha,
f,ha,hg,ha,d,ha,hg,ha,fs,ha,
hg,ha,e,ha,hg,ha,f,ha,hg,ha,
c,ha,hg,ha,f,ha,hg,ha,e,ha,
hg,ha,f,ha,hg,ha,d,ha,hg,ha,
f,ha,hg,ha,e,ha,hg,ha,f,ha,
hg,ha,b,ha,hg,ha,f,ha,hg,ha,
e,ha,hg,ha,f,ha,hg,ha,d,ha,
hg,ha,f,ha,hg,ha,e,ha,hg,ha,
e,ha,hg,ha,c,ha,hg,ha,f,ha,
hg,ha,e,ha,hg,ha,f,ha,hg,ha,
d,ha,hg,ha,fs,ha,hg,ha,e,ha,
hg,ha,f,ha,hg,ha,la,ha,hg,ha,
f,ha,hg,ha,e,ha,hg,ha,f,ha,
hg,ha,d,ha,hg,ha,f,ha,hg,ha,
e,ha,hg,ha,f,ha,hg,ha,cs,ha,
hg,ha,f,ha,hg,ha,e,ha,hg,ha,
f,ha,hg,ha,580,ha,hg,ha,f,ha,
hg,ha,e,ha,hg,ha,f,ha,hg,ha,
as,ha,hg,ha,f,ha,hg,ha,e,ha,
hg,ha,f,ha,hg,ha,d,ha,hg,ha,
f,ha,hg,ha,e,ha,hg,ha,f,ha,
hg,ha,c,ha,hg,ha,fs,ha,hg,ha,
e,ha,hg,ha,f,ha,hg,ha,d,ha,
hg,ha,fs,ha,hg,ha,e,ha,hg,ha,
fs,ha,hg,ha,lg };
void setup() {
pinMode(14, OUTPUT);
Serial.begin(115200);
delay(1000);
}
void loop() {
int t1=touchRead(4);
int t2=touchRead(2);
int t3=touchRead(15);
int t4=touchRead(13);
int t5=touchRead(12);
int t6=touchRead(27);
int t7=touchRead(33);
int t8=touchRead(32);
int note = 0;
// Debug reading
//Serial.println(t1);
// My readings are near zero and above 50
// So I chose 30 (adjust when needed)
if ( t1 < 30) {
bitSet(note, 0);
}
if ( t2 < 30) {
bitSet(note, 1);
}
if ( t3 < 30) {
bitSet(note, 2);
}
if ( t4 < 30) {
bitSet(note, 3);
}
if ( t5 < 30) {
bitSet(note, 4);
}
if ( t6 < 30) {
bitSet(note, 5);
}
if ( t7 < 30) {
bitSet(note, 6);
}
if ( t8 < 30) {
bitSet(note, 7);
}
//Serial.println(note);
if (note == 0 && note != prevnote) {
noTone(14);
prevnote = 0;
}
if (note != prevnote) {
tone(14,data[note]);
// debug
//Serial.print("Note number : ");
//Serial.println(note);
//Serial.print("Freq : ");
//Serial.println(data[note]);
prevnote = note;
}
}
