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Hysteresis for all quantized modes.
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@MisaelK
MisaelK committed Sep 16, 2023
1 parent 2360217 commit 7d00c6d
Showing 1 changed file with 87 additions and 61 deletions.
148 changes: 87 additions & 61 deletions thereminus/thereminus.ino
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Original file line number Diff line number Diff line change
Expand Up @@ -17,14 +17,14 @@ const byte CONTINUOUS_MODE_VOLUME = 8; // from 0 to 15
const byte QUANTIZED_MODE_VELOCITY = 64; // from 0 to 127
const int CONTINUOUS_MODE_MAX_FREQ = 2400;
const int HYSTERESIS_IN_CM = 3;
const int NOTE_DIVISIONS = 10;
const int NUM_NOTES = ceil((MAX_DISTANCE - MIN_DISTANCE) / NOTE_DIVISIONS);
const int MIDI_BASE_NOTE = 57;

byte rangeUp;
byte rangeDown;
byte segment = 0;
byte previousSegment = 0;
byte midiNote = 0;
byte previousMidiNote = 0;
int num_notes = 0;

char debugStringBuffer[60];
bool debugMode = true;
Expand Down Expand Up @@ -486,7 +486,6 @@ void loop() {
voices[i].amp = 0;
continue;
}


// set hysteresis as a range going from bottom to top or from top to bottom.
// each zone determines the current note, which can only be changed
Expand All @@ -495,52 +494,84 @@ void loop() {
// --1-- ?? --2-- ?? --3-- ?? --4-- ??
// << 11111 22222222 33333333 44444444 55 <<

// set range that skips the hysteresis to allow for faster response times
if (quantizedModeScale == CHROMATIC) noteJumpDistance = 2;

rangeUp = ceil(sonar[i].distance / NOTE_DIVISIONS);
rangeDown = ceil((sonar[i].distance + HYSTERESIS_IN_CM) / NOTE_DIVISIONS);
/*
if (rangeUp == rangeDown) {
midiNote = MIDI_BASE_NOTE + rangeUp;
}
if (abs(midiNote - previousMidiNote) >= noteJumpDistance) {
midiNote = MIDI_BASE_NOTE + rangeUp;
}
previousMidiNote = MIDI_BASE_NOTE + rangeUp;
*/
if (quantizedModeScale == CHROMATIC) {
// no restrictions
num_notes = 24;
rangeUp = ceil(sonar[i].distance * num_notes / MAX_DISTANCE);
rangeDown = ceil((sonar[i].distance + HYSTERESIS_IN_CM) * num_notes / MAX_DISTANCE);
if (rangeUp == rangeDown || abs(segment - previousSegment) >= noteJumpDistance) {
segment = rangeUp;
}
previousSegment = rangeUp;
midiNote = segment + MIDI_BASE_NOTE;

// leds
RowOn(1); RowOn(2); RowOn(3);
ColumnsOff();
if (segment == 8) ColumnOn(1);
if (segment == 9) ColumnOn(2);
if (segment == 10) ColumnOn(3);
if (segment == 11) ColumnOn(4);
if (segment == 12) ColumnOn(5);
if (segment == 13) ColumnOn(6);
if (segment == 14) ColumnOn(7);
if (segment == 15) ColumnOn(8);
if (segment == 16) ColumnOn(9);
}
if (quantizedModeScale == C_PENTATONIC) {
/*
RowOn(1); RowOn(2); RowOn(3);
midiNote = map(sonar[i].distance, MIN_DISTANCE, MAX_DISTANCE, 9, 0);
*/
if (rangeUp == rangeDown) {
midiNote = rangeUp;
num_notes = 10;
rangeUp = ceil(sonar[i].distance * num_notes / MAX_DISTANCE);
rangeDown = ceil((sonar[i].distance + HYSTERESIS_IN_CM) * num_notes / MAX_DISTANCE);

if (rangeUp == rangeDown || abs(segment - previousSegment) >= noteJumpDistance) {
segment = rangeUp;
}
if (midiNote == 0) {midiNote = 57; ColumnsOff();}
if (midiNote == 1) {midiNote = 60; ColumnsOff(); ColumnOn(1);}
if (midiNote == 2) {midiNote = 62; ColumnsOff(); ColumnOn(2);}
if (midiNote == 3) {midiNote = 65; ColumnsOff(); ColumnOn(3);}
if (midiNote == 4) {midiNote = 67; ColumnsOff(); ColumnOn(4);}
if (midiNote == 5) {midiNote = 69; ColumnsOff(); ColumnOn(5);}
if (midiNote == 6) {midiNote = 72; ColumnsOff(); ColumnOn(6);}
if (midiNote == 7) {midiNote = 74; ColumnsOff(); ColumnOn(7);}
if (midiNote == 8) {midiNote = 77; ColumnsOff(); ColumnOn(8);}
if (midiNote == 9) {midiNote = 79; ColumnsOff(); ColumnOn(9);}

previousSegment = rangeUp;
const int NOTES[num_notes + 1] = {
57, 60, 62, 65, 67, 69, 72, 74, 77, 79, 81
};
midiNote = NOTES[segment];

// leds
RowOn(1); RowOn(2); RowOn(3);
ColumnsOff();
if (segment == 1) ColumnOn(1);
if (segment == 2) ColumnOn(2);
if (segment == 3) ColumnOn(3);
if (segment == 4) ColumnOn(4);
if (segment == 5) ColumnOn(5);
if (segment == 6) ColumnOn(6);
if (segment == 7) ColumnOn(7);
if (segment == 8) ColumnOn(8);
if (segment == 9) ColumnOn(9);
}
if (quantizedModeScale == A_MAJOR) {
const int index = map(sonar[i].distance, MIN_DISTANCE, MAX_DISTANCE, NUM_NOTES - 1, 0);
/*const int NOTES[NUM_NOTES] = {
int a_major_notes = 24;
rangeUp = ceil(sonar[i].distance * a_major_notes / MAX_DISTANCE);
rangeDown = ceil((sonar[i].distance + HYSTERESIS_IN_CM) * a_major_notes / MAX_DISTANCE);
if (rangeUp == rangeDown || abs(segment - previousSegment) >= noteJumpDistance) {
segment = rangeUp;
}
previousSegment = rangeUp;
const int NOTES[a_major_notes + 1] = {
42, 44, 45, 47, 49, 50, 52,
54, 56, 57, 59, 61, 62, 64,
66, 68, 69, 71, 73, 74, 76,
78, 80, 81
78, 80, 81, 83
};
midiNote = NOTES[index];*/
midiNote = NOTES[segment];

// leds
RowOn(1); RowOn(2); RowOn(3);
ColumnsOff();
if (segment == 8) ColumnOn(1);
if (segment == 9) ColumnOn(2);
if (segment == 10) ColumnOn(3);
if (segment == 11) ColumnOn(4);
if (segment == 12) ColumnOn(5);
if (segment == 13) ColumnOn(6);
if (segment == 14) ColumnOn(7);
if (segment == 15) ColumnOn(8);
if (segment == 16) ColumnOn(9);
}
serialDebug("%.2d %.2d %.2d %.2d\n", rangeUp, rangeDown, midiNote, sonar[i].distance);

Expand All @@ -555,37 +586,32 @@ void loop() {
}
}

// for (int i = 0; i < NUM_SONARS; i++) {
// serialDebug("%.2d %.4d ", i, sonar[i].distance);
// }
// serialDebug("\n");

if (isButtonPressed(PIN_BUTTON, LOW, true)) {
serialDebug("new playing mode: ");
// if (playingMode == CONTINUOUS) {
// playingMode = QUANTIZED;
// quantizedModeScale = CHROMATIC;
// serialDebug("quantized - chromatic");
// } else if (playingMode == QUANTIZED && quantizedModeScale == CHROMATIC) {
// playingMode = QUANTIZED;
// quantizedModeScale = C_PENTATONIC;
// serialDebug("quantized - C pentatonic");
// } else if (playingMode == QUANTIZED && quantizedModeScale == C_PENTATONIC) {
// playingMode = QUANTIZED;
// quantizedModeScale = A_MAJOR;
// serialDebug("quantized - A major");
// } else if (playingMode == QUANTIZED && quantizedModeScale == A_MAJOR) {
// playingMode = CONTINUOUS;
// serialDebug("continuous");
// }
if (playingMode == CONTINUOUS) {
playingMode = QUANTIZED;
quantizedModeScale = CHROMATIC;
serialDebug("quantized - chromatic");
} else if (playingMode == QUANTIZED && quantizedModeScale == CHROMATIC) {
playingMode = QUANTIZED;
quantizedModeScale = C_PENTATONIC;
serialDebug("quantized - C pentatonic");
} else if (playingMode == QUANTIZED && quantizedModeScale == C_PENTATONIC) {
playingMode = QUANTIZED;
quantizedModeScale = A_MAJOR;
serialDebug("quantized - A major");
} else if (playingMode == QUANTIZED && quantizedModeScale == A_MAJOR) {
playingMode = CONTINUOUS;
serialDebug("continuous");
}
// if (playingMode == CONTINUOUS) {
// playingMode = QUANTIZED;
// quantizedModeScale = C_PENTATONIC;
// serialDebug("quantized - C pentatonic");
// } else if (playingMode == QUANTIZED && quantizedModeScale == C_PENTATONIC) {
// playingMode = CONTINUOUS;
// serialDebug("continuous");
// }
serialDebug("\n");
}

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