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bassline for Numerology

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Mike Lynch 2024-02-11 14:55:58 +11:00
parent 0bff8f0db0
commit 43b41bde8f
1 changed files with 7 additions and 10 deletions
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17
Karplus_Strong/Karplus_Strong.ino
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@ -15,10 +15,9 @@ unsigned int phase;
unsigned int length; unsigned int length;
unsigned int repeats; unsigned int repeats;
int note = 0; int note = 0;
//int freqs[] = { 256, 228, 205, 192, 171, 154, 137, 128, 114, 102, 96, 85, 77, 68, 64 };
//int freqs[] = { 128, 114, 102, 96, 85, 77, 68, 64, 56, 51, 48, 42, 38, 34, 32 };
int freqs[] = { 64, 56, 51, 48, 42, 38, 34, 32, 28, 25, 24, 21, 19, 17, 16 }; int freqs[] = { 64, 56, 51, 48, 42, 38, 34, 32, 28, 25, 24, 21, 19, 17, 16 };
int tune[] = { 0, 4, 3, 5, -1, -1, -1, -1 }; int tune2[] = { 2, -1, -1, 2, -1, -1, 3, -1, 2, -1, -1, -1, 0, -1, -1, -1 };
//int tune2[] = { 2, -1, -1, -1, -1, -1, -1, -1, 2, -1, -1, -1, 4, -1, -1, -1 };
byte waveform[nsamp]; byte waveform[nsamp];
@ -35,10 +34,10 @@ void setup() {
// set compare match register for 1hz increments // set compare match register for 1hz increments
//OCR1A = 15624;// = (16*10^6) / (1*1024) - 1 (must be <65536) //OCR1A = 15624;// = (16*10^6) / (1*1024) - 1 (must be <65536)
//OCR1A = 7812;// = (16*10^6) / (1*1024) - 1 (must be <65536) //OCR1A = 7812;// = (16*10^6) / (1*1024) - 1 (must be <65536)
OCR1A = 10000; OCR1A = 2000;
// turn on CTC mode // turn on CTC mode
TCCR1B |= (1 << WGM12); TCCR1B |= (1 << WGM12);
// Set CS10 and CS12 bits for 1024 prescaler // Set CS10 and CS12 bits for 1024 escaler
TCCR1B |= (1 << CS12) | (1 << CS10); TCCR1B |= (1 << CS12) | (1 << CS10);
// enable timer compare interrupt // enable timer compare interrupt
TIMSK1 |= (1 << OCIE1A); TIMSK1 |= (1 << OCIE1A);
@ -46,7 +45,6 @@ void setup() {
sei(); sei();
Serial.begin(115200);
if (!mcp.begin(0x64)) { if (!mcp.begin(0x64)) {
while (1) { while (1) {
@ -62,18 +60,17 @@ void setup() {
} }
ISR(TIMER1_COMPA_vect){//timer1 ISR(TIMER1_COMPA_vect){//timer1
if( tune[note] > -1 ) { if( tune2[note] > -1 ) {
length=freqs[tune[note]]; length=freqs[tune2[note]];
for (int i=0; i<nsamp; ++i){ for (int i=0; i<nsamp; ++i){
waveform[i]=random(256); waveform[i]=random(256);
} }
} }
note++; note++;
if( note > 7 ) { if( note > 15 ) {
note = 0; note = 0;
} }
pd = analogRead(A0) >> 4; pd = analogRead(A0) >> 4;
Serial.println(pd);
} }