Remaining tracks and complete notes

01LogisticChaos/01LogisticChaos.ino

@@ -37,5 +37,4 @@ void loop() {
   xlog = r * xlog * (1 - xlog);
   int cv = round(xlog * 4095.0);  
   mcp.setChannelValue(MCP4728_CHANNEL_A, cv);
-  delay(100);
 }

27CloudII/27CloudII.ino

@@ -0,0 +1,145 @@
+// Better sequencer which uses interrupts
+
+#include <Adafruit_MCP4728.h>
+#include <Wire.h>
+
+Adafruit_MCP4728 mcp;
+
+
+float tuning[37];
+float voltrange = 4.85;  // measured this, probably not accurate
+float octave = 4096.0 / voltrange; // number of DAC steps in an octave
+
+
+// melody
+
+// int pitch[] = { 4, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+// -1, -1, -1, -1, -1, -1, -1, -1,-1, -1, -1, -1,2, -1, -1, -1, };
+// int dur[] = { 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+//             0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0,  };
+
+// hi hat
+
+int pitch[] = { 1, -1, 3, -1, 4, -1, 5, -1, };
+
+
+int note = 0;
+int phrase = 8;
+int grains_n = 12;
+int grainc = 0;
+int grainsize = 20;
+
+int s;
+int bpm = 9000;
+float beat_s = 60.0 / (float)bpm;
+float note_s = beat_s * grains_n;
+float beat_m = 1000.0 * beat_s; 
+bool noteon = false;
+int beat = false;
+long notestart, notedur, barstart;
+int target, slew;
+float decay = 0.1;
+
+
+void setup() {
+  Serial.begin(115200);
+
+  float freq = (float)bpm / 60.0;
+
+  int ocr = round(16000000.0 / (1024.0 * freq )) - 1;
+  Serial.println(ocr);
+  if( ocr < 65536 ) {
+
+    cli();
+
+    TCCR1A = 0;// set entire TCCR1A register to 0
+    TCCR1B = 0;// same for TCCR1B
+    TCNT1  = 0;//initialize counter value to 0
+    OCR1A = ocr; //ocr; 
+    // turn on CTC mode
+    TCCR1B |= (1 << WGM12);
+    // Set CS10 and CS12 bits for 1024 escaler
+    TCCR1B |= (1 << CS12) | (1 << CS10);  
+    // enable timer compare interrupt
+    TIMSK1 |= (1 << OCIE1A);
+
+    sei();
+
+  } else {
+    Serial.println("BPM out of range");
+  }
+
+  if (!mcp.begin(0x64)) {
+    while (1) {
+      delay(100);
+    }
+  }
+
+  // randomSeed(analogRead(A0));
+  mcp.setSpeed(800000L);
+  make_tuning(12);
+  note=0;
+  notestart=millis();
+}
+
+void make_tuning(int edo) {
+  float n0 = 0;
+  float edof = (float)edo;
+  for( int i = 0; i < 37; i++ ) {
+      tuning[i] = round(n0 + octave * (float)i / edof);
+  }
+
+}
+
+
+ISR(TIMER1_COMPA_vect){ // called once every beat
+  beat = true;
+}
+
+
+bool play_grain(int dur) {
+  return true;
+//  return random(0, 1000) > (float)dur * decay;
+}
+
+
+void loop() {
+  int now = millis();
+  if( beat ) {
+    beat = false;
+    noteOn(pitch[s], now - notestart);
+    grainc++;
+    if( grainc > grains_n ) {
+      grainc = 0;
+      s += 1;
+      if( s == phrase ) {
+        s = 0;
+        notestart = now;
+      }
+      grainc = 0;
+      Serial.println(s);
+    }
+  } else {
+    if( noteon && now - notestart > grainsize ) {
+      noteOff();
+    }
+  } 
+}
+
+
+void noteOn(int note, int dur) {
+  Serial.println("noteOn");
+  if( note > -1 && play_grain(dur) ) {
+    mcp.setChannelValue(MCP4728_CHANNEL_A, tuning[note]);
+    mcp.setChannelValue(MCP4728_CHANNEL_B, 4095);
+    noteon = true;
+  }
+}
+
+void noteOff() {
+    mcp.setChannelValue(MCP4728_CHANNEL_B, 0);
+    noteon = false;
+    Serial.println("noteOff");
+}
+
+

29SequencerChaos/29SequencerChaos.ino

@@ -0,0 +1,160 @@
+// Better sequencer which uses interrupts
+
+#include <Adafruit_MCP4728.h>
+#include <Wire.h>
+
+Adafruit_MCP4728 mcp;
+
+
+float tuning[37];
+float voltrange = 4.85;  // measured this, probably not accurate
+float octave = 4096.0 / voltrange; // number of DAC steps in an octave
+
+
+// melody
+// int pitch[] = { 1,3,7,2,3,4,3,4,3,4,6,7,3,4,3,1,3, 5, 9, 4, 5, 6, 5, 6, 5, 6, 8, 9, 5, 6, 5, 3};
+// float dur[] = { 0.1,0.00, 0.1, 0.05, 0.1,0.05, 0.05, 0.05,
+// 0.1,0.05, 0.1, 0.05, 0.1,0.05, 0.05, 0.05,
+// 0.1,0.05, 0.1, 0.05, 0.1,0.05, 0.05, 0.05,
+// 0.1,0.05, 0.1, 0.05, 0.1,0.05, 0.05, 0.05,};
+
+
+int pitch[] = { 4, 1, 2, 3, 4, 5, 6, 4, 3, };
+int dur[] = { 0.6, 0.6,0.6,0.6,0.6,0.6,0.6,0.6, };
+
+//float rseq[] = { 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, };
+float rseq[] = { 4.0, 3.6, -1, 3.232, 3.99, -1, -1, -1, };
+
+int note = 0;
+int phrase = 8;
+
+int s;
+int bpm = 121;
+float beat_s = 60.0 / (float)bpm;
+float beat_m = 1000.0 * beat_s; 
+bool noteon = false;
+int beat = false;
+long notestart, notedur, barstart;
+float xlog = 0.75;
+float r = 3.7;
+
+void setup() {
+  Serial.begin(115200);
+
+  float freqint = 60.0 / (float)bpm;
+
+  int ocr = round(16000000.0 / (1024.0 * freqint * 16)) - 1;
+  Serial.println(ocr);
+  if( ocr < 65536 ) {
+
+    cli();
+
+    TCCR1A = 0;// set entire TCCR1A register to 0
+    TCCR1B = 0;// same for TCCR1B
+    TCNT1  = 0;//initialize counter value to 0
+    OCR1A = ocr; 
+    // turn on CTC mode
+    TCCR1B |= (1 << WGM12);
+    // Set CS10 and CS12 bits for 1024 escaler
+    TCCR1B |= (1 << CS12) | (1 << CS10);  
+    // enable timer compare interrupt
+    TIMSK1 |= (1 << OCIE1A);
+
+    sei();
+
+  } else {
+    Serial.println("BPM out of range");
+  }
+
+  if (!mcp.begin(0x64)) {
+    while (1) {
+      delay(100);
+    }
+  }
+
+  // randomSeed(analogRead(A0));
+  mcp.setSpeed(800000L);
+  make_tuning(7);
+  note=0;
+  barstart=millis();
+}
+
+void make_tuning(int edo) {
+  float n0 = 0;
+  float edof = (float)edo;
+  for( int i = 0; i < 37; i++ ) {
+      tuning[i] = round(n0 + octave * (float)i / edof);
+  }
+
+}
+
+
+// mod_note argument is milliseconds from the start of last note
+float mod_note(int x) {
+  return 1 - sq((float)x / 1000.0);
+}
+
+// mod_note argument is milliseconds from the start of this bar
+float mod_bar(int x) {
+  return 0.5 + 0.5 * sin((float)x / (beat_m * 2));
+}
+
+void set_mod(MCP4728_channel_t channel, float v) {
+  int o;
+  o = round(v * 4095.0);
+  if( o > 4095 ) {
+    o = 4095;
+  }
+  if( o < 0 ) {
+    o = 0;
+  } 
+  mcp.setChannelValue(channel, o);
+}
+
+ISR(TIMER1_COMPA_vect){ // called once every beat
+  beat = true;
+}
+
+
+void loop() {
+  float mod;
+  int o;
+  long now = millis();
+  if( beat ) {
+    r = rseq[s];
+    beat = false;
+    if( rseq[s] > -1 ) {
+      notestart = millis();
+      notedur = round(beat_m * dur[s]);
+      noteOn(pitch[s]);
+      noteon = true;
+    }
+    s += 1;
+    if( s == phrase ) {
+      s = 0;
+      barstart = notestart;
+    }
+  } else {
+    if( noteon ) {
+      if( now - notestart > notedur ) {
+        noteOff();
+        noteon = false;
+      }
+    }
+  }
+  xlog = r * xlog * (1 - xlog);
+  mcp.setChannelValue(MCP4728_CHANNEL_A, round(xlog * 4095.0));
+}
+
+
+void noteOn(int note) {
+//    mcp.setChannelValue(MCP4728_CHANNEL_A, tuning[note]);
+    mcp.setChannelValue(MCP4728_CHANNEL_B, 4095);
+}
+
+void noteOff() {
+    Serial.println("off");
+    mcp.setChannelValue(MCP4728_CHANNEL_B, 0);
+}
+
+

30LogisticMod/30LogisticMod.ino

@@ -0,0 +1,163 @@
+// Better sequencer which uses interrupts
+
+#include <Adafruit_MCP4728.h>
+#include <Wire.h>
+
+Adafruit_MCP4728 mcp;
+
+
+float tuning[37];
+float voltrange = 4.85;  // measured this, probably not accurate
+float octave = 4096.0 / voltrange; // number of DAC steps in an octave
+
+
+// melody
+
+// int pitch[] = { 4, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+// -1, -1, -1, -1, -1, -1, -1, -1,-1, -1, -1, -1,2, -1, -1, -1, };
+// int dur[] = { 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+//             0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0,  };
+
+// hi hat
+
+int pitch[] = { 1, -1, -1-1, 4, -1,-1, -1,1, -1, -1,-1, 4, -1,-1, -1,1, -1, -1,-1, 4, -1,-1, -1,1, -1, -1,-1, 4, -1,-1, -1, };
+int dur[] = { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,   };
+
+
+int note = 0;
+int phrase = 32;
+
+int s;
+int bpm = 80;
+float beat_s = 60.0 / (float)bpm;
+float beat_m = 1000.0 * beat_s; 
+bool noteon = false;
+int beat = false;
+long notestart, notedur, barstart;
+float xlog = 0.75;
+float r = 0;
+
+void setup() {
+  Serial.begin(115200);
+
+  float freqint = 60.0 / (float)bpm;
+
+  int ocr = round(16000000.0 / (1024.0 * freqint * 16)) - 1;
+  Serial.println(ocr);
+  if( ocr < 65536 ) {
+
+    cli();
+
+    TCCR1A = 0;// set entire TCCR1A register to 0
+    TCCR1B = 0;// same for TCCR1B
+    TCNT1  = 0;//initialize counter value to 0
+    OCR1A = ocr; 
+    // turn on CTC mode
+    TCCR1B |= (1 << WGM12);
+    // Set CS10 and CS12 bits for 1024 escaler
+    TCCR1B |= (1 << CS12) | (1 << CS10);  
+    // enable timer compare interrupt
+    TIMSK1 |= (1 << OCIE1A);
+
+    sei();
+
+  } else {
+    Serial.println("BPM out of range");
+  }
+
+  if (!mcp.begin(0x64)) {
+    while (1) {
+      delay(100);
+    }
+  }
+
+  // randomSeed(analogRead(A0));
+  mcp.setSpeed(800000L);
+  make_tuning(12);
+  note=0;
+  barstart=millis();
+}
+
+void make_tuning(int edo) {
+  float n0 = 0;
+  float edof = (float)edo;
+  for( int i = 0; i < 37; i++ ) {
+      tuning[i] = round(n0 + octave * (float)i / edof);
+  }
+
+}
+
+
+// mod_note argument is milliseconds from the start of last note
+float mod_note(int x) {
+  float xb = x / (0.2 * beat_m);
+  return 0.5 + 0.5 * xb * (xb - 1) * ( xb - 2);
+}
+
+// mod_note argument is milliseconds from the start of this bar
+float mod_bar(int x) {
+  return 0.5 + 0.5 * sin((float)x / (beat_m));
+}
+
+void set_mod(MCP4728_channel_t channel, float v) {
+  int o;
+  o = round(v * 4095.0);
+  if( o > 4095 ) {
+    o = 4095;
+  }
+  if( o < 0 ) {
+    o = 0;
+  } 
+  mcp.setChannelValue(channel, o);
+}
+
+ISR(TIMER1_COMPA_vect){ // called once every beat
+  beat = true;
+}
+
+
+void loop() {
+  float mod;
+  int o;
+  long now = millis();
+  if( beat ) {
+    beat = false;
+    if( pitch[s] > -1 ) {
+      notestart = millis();
+      notedur = round(beat_m * dur[s]);
+      noteOn(pitch[s]);
+      noteon = true;
+    }
+    s += 1;
+    if( s == phrase ) {
+      s = 0;
+      barstart = notestart;
+    }
+  } else {
+    if( noteon ) {
+        set_mod(MCP4728_CHANNEL_C, mod_note(now - notestart));
+      if( now - notestart > notedur ) {
+        noteOff();
+        noteon = false;
+      }
+    }
+    mod = mod_bar(now - barstart);
+    set_mod(MCP4728_CHANNEL_D, mod);
+    r = 3.0 + mod;
+    xlog = r * xlog * (1 - xlog);
+    mcp.setChannelValue(MCP4728_CHANNEL_A, round(xlog * 4095.0));
+  }
+}
+
+
+void noteOn(int note) {
+  if( note > -1 ) {
+    mcp.setChannelValue(MCP4728_CHANNEL_B, 4095);
+  }
+}
+
+void noteOff() {
+    mcp.setChannelValue(MCP4728_CHANNEL_B, 0);
+}
+
+

31FibomodAgain/31FibomodAgain.ino

@@ -0,0 +1,195 @@
+// Better sequencer which uses interrupts
+
+#include <Adafruit_MCP4728.h>
+#include <Wire.h>
+
+Adafruit_MCP4728 mcp;
+#define nsamp 1500
+#define dacmax 256
+
+
+float tuning[37];
+float voltrange = 4.85;  // measured this, probably not accurate
+float octave = 4096.0 / voltrange; // number of DAC steps in an octave
+
+byte waveform[nsamp];
+
+// melody
+
+// int pitch[] = { 4, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+// -1, -1, -1, -1, -1, -1, -1, -1,-1, -1, -1, -1,2, -1, -1, -1, };
+// int dur[] = { 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+//             0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0,  };
+
+// melody
+
+int pitch[] = { 1, -1, -1, -1, -1, -1, -1, -1, };
+int sequence[] = { 97, 98, 99, 100, 101, 102, 103, 104,105,};
+float dur[] = { 0.4, 0.4, 0.4, 0.4, 0.4, 0.4, 0.4, 0.4, };
+
+
+// bass 
+
+
+unsigned int phase = 0;
+unsigned int fibo = 3;
+unsigned int scale = 0;
+unsigned int fibi = 0;
+unsigned int gate = 4095;
+unsigned int pmax = nsamp;
+unsigned int beat = 0;
+
+
+int note = 0;
+int phrase = 16;
+
+int s;
+int bpm = 220;
+float beat_s = 60.0 / (float)bpm;
+float beat_m = 1000.0 * beat_s; 
+bool noteon = false;
+long notestart, notedur, barstart;
+float xlog = 0.75;
+float r = 0;
+
+void setup() {
+  Serial.begin(115200);
+
+  float freqint = (float)bpm/ 60.0;
+
+  int ocr = round(16000000.0 / (1024.0 * freqint)) - 1;
+  Serial.println(ocr);
+  if( ocr < 65536 ) {
+
+    cli();
+
+    TCCR1A = 0;// set entire TCCR1A register to 0
+    TCCR1B = 0;// same for TCCR1B
+    TCNT1  = 0;//initialize counter value to 0
+    OCR1A = ocr; 
+    // turn on CTC mode
+    TCCR1B |= (1 << WGM12);
+    // Set CS10 and CS12 bits for 1024 escaler
+    TCCR1B |= (1 << CS12) | (1 << CS10);  
+    // enable timer compare interrupt
+    TIMSK1 |= (1 << OCIE1A);
+
+    sei();
+
+  } else {
+    Serial.println("BPM out of range");
+  }
+
+  if (!mcp.begin(0x64)) {
+    while (1) {
+      delay(100);
+    }
+  }
+  for( int i = 0; i < nsamp; i++ ) {
+    waveform[i] = 1;
+  }
+  fibi = 3;
+  fibo =  3; //fibosort[fibi];
+  setwave();
+
+  // randomSeed(analogRead(A0));
+  mcp.setSpeed(800000L);
+  note=0;
+  barstart=millis();
+
+
+}
+
+void setwave(){
+  waveform[0] = 0;
+  waveform[1] = 1;
+  fibo = fibi; // fibosort[fibi];// + 3;
+  pmax = nsamp;
+  for (int i=2; i<nsamp; ++i){
+    waveform[i] = (waveform[i - 1] + waveform[i - 2]) % fibo;
+    if( waveform[i - 1] == 0 && waveform[i] == 1 ) {
+      pmax = i - 1;
+      break;
+    }
+  }
+  float scale = 256 / fibo;
+  for( int i = 0; i < nsamp; ++i ) {
+    waveform[i] *= scale;
+  }
+}
+
+
+
+// mod_note argument is milliseconds from the start of last note
+float mod_note(int x) {
+  float xb = x / (0.2 * beat_m);
+  return 0.5 + 0.5 * xb * (xb - 1) * ( xb - 2);
+}
+
+// mod_note argument is milliseconds from the start of this bar
+float mod_bar(int x) {
+  return 0.5 + 0.5 * sin((float)x / (beat_m));
+}
+
+void set_mod(MCP4728_channel_t channel, float v) {
+  int o;
+  o = round(v * 4095.0);
+  if( o > 4095 ) {
+    o = 4095;
+  }
+  if( o < 0 ) {
+    o = 0;
+  } 
+  mcp.setChannelValue(channel, o);
+}
+
+ISR(TIMER1_COMPA_vect){ // called once every beat
+  note++;
+  if( note == phrase ) {
+    note = 0;
+  }
+  fibi = sequence[note];
+  beat = true;
+  setwave();
+  phase = 0;
+}
+
+
+void loop() {
+  float mod;
+  int o;
+  long now = millis();
+  if( beat ) {
+    beat = false;
+    if( pitch[note] > -1 ) {
+      notestart = millis();
+      notedur = round(beat_m * dur[s]);
+      Serial.println(notedur);
+      gate = 4095;
+    }
+  } else {
+    if( gate ) {
+      if( now - notestart > notedur ) {
+        gate = 0;
+      }
+    }
+    mcp.fastWrite(waveform[phase] << 4, gate, 0, 0);
+    phase += 1;
+    if( phase == pmax ) {
+      phase = 0;
+    }
+  }
+}
+
+
+void noteOn(int note) {
+  if( note > -1 ) {
+    mcp.setChannelValue(MCP4728_CHANNEL_B, 4095);
+  }
+}
+
+void noteOff() {
+    mcp.setChannelValue(MCP4728_CHANNEL_B, 0);
+}
+
+

README.md

@@ -120,6 +120,36 @@ Another 7TET piece using the sequencer
 Using the sequencer to trigger envelopes and LFOs at two scales - notes and
 bars
 
-### 26
+### 26 Slew
 
-Basic slew / portamento
+Basic slew / portamento
+
+### 27 Stasis Field
+
+A single track I recorded when trying to make Ribosome and left for later
+because I liked it
+
+### 28 Spores
+
+One thing I wanted to get working this year was triggering clouds of small
+events which I could layer up into richer textures. I didn't really succeed,
+this is as close as I got.
+
+### 29 Nickel Itch
+
+Controlling the AR logistic function with the sequencer and distorting and
+filtering with the modular. This is probably my favourite track. Nickel itch
+is a skin irritation caused by that metal which afflicts manual workers in
+electroplating shops.
+
+### 30 Processor
+
+More sequenced/timed control of the AR logistic noise
+
+### 31 Two Against One
+
+Trying to drive the Fibonacci algorithm with the sequencer ended up with one
+really good track and a bunch of failed attempts to make a bassline to go with
+it. Then I decided to use the attempts by themselves. Then I came back to do
+the mixdown and thought of adding the original track over the top. This is 
+my second favourite after Nickel Itch.