Fork fakebitpolytechnic/cheapsynth

1 files changed, 0 insertions, 167 deletions

diff --git a/fm_v1_ino/fm_v1_ino.ino b/fm_v1_ino/fm_v1_ino.ino
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-/*  Example of a sound being triggered by MIDI input.
- *
- *  Demonstrates playing notes with Mozzi in response to MIDI input,
- *  using the standard Arduino MIDI library:
- *  http://playground.arduino.cc/Main/MIDILibrary
- *
- *  Mozzi help/discussion/announcements:
- *  https://groups.google.com/forum/#!forum/mozzi-users
- *
- *  Tim Barrass 2013.
- *  This example code is in the public domain.
- *
- *  sgreen - modified to use standard Arduino midi library, added saw wave, lowpass filter
- *  Audio output from pin 9 (pwm)
- *  Midi plug pin 2 (centre) to Arduino gnd, pin 5 to RX (0)
- *  http://www.philrees.co.uk/midiplug.htm
- *
- * dgreen - nutty portamento added!
- */
-
-#include <MIDI.h>
-#include <MozziGuts.h>
-#include <Oscil.h> // oscillator template
-#include <Line.h> // for envelope
-#include <mozzi_midi.h>
-#include <ADSR.h>
-#include <mozzi_fixmath.h>
-#include <Portamento.h>
-#include <tables/cos2048_int8.h> // table for Oscils to play
-#include <tables/square_analogue2048_int8.h> // table for Oscils to play
-
-// use #define for CONTROL_RATE, not a constant
-#define CONTROL_RATE 256 // powers of 2 please
-
-//  Mozzi example uses COS waves for carrier and modulator
-//  Shit gets brutal very fast if you use a saw/square carrier
-//  Shit gets subtly more brutal if you use smaller wavetables (fewer samples per cycle)
-Oscil<SQUARE_ANALOGUE2048_NUM_CELLS, AUDIO_RATE> oscCarrier(SQUARE_ANALOGUE2048_DATA);
-Oscil<COS2048_NUM_CELLS, AUDIO_RATE> oscModulator(COS2048_DATA);
-Oscil<COS2048_NUM_CELLS, AUDIO_RATE> oscLFO(COS2048_DATA);
-
-// envelope generator
-ADSR <CONTROL_RATE> envelope;
-Portamento <CONTROL_RATE>aPortamento;
-
-#define LED 13 // to see if MIDI is being recieved
-
-unsigned long vibrato = 0;
-float carrierFreq = 10.f;
-float modFreq = 10.f;
-float modDepth = 0;
-float amplitude = 0.f;
-float modOffset = 1;
-byte lastnote = 0;
-int portSpeed = 100;
-
-float modOffsets[] = {
-  4, 3.5, 3, 2.5,
-  2, 1.5, 1, 0.6666667,
-  0.5, 0.4, 0.3333333, 0.2857,
-  0.25, 0, 0, 0,
-  0, 0, 0
-}; // freq ratios corresponding to DP's preferred intervals of 7, 12, 7, 19, 24, 0, 12, -12, etc
-
-void setup()
-{
-  pinMode(LED, OUTPUT);
-
-  MIDI.begin(MIDI_CHANNEL_OMNI);
-  MIDI.setHandleNoteOn(HandleNoteOn);
-  MIDI.setHandleNoteOff(HandleNoteOff);
-  MIDI.setHandleControlChange(HandleControlChange);
-  MIDI.setHandlePitchBend(HandlePitchBend);
-  MIDI.setHandleProgramChange(HandleProgramChange); 
-  MIDI.setHandleContinue(HandleContinue); 
-
-  envelope.setADLevels(255, 174);
-  envelope.setTimes(10, 50, 20000, 10); // 20000 is so the note will sustain 20 seconds unless a noteOff comes
-  aPortamento.setTime(50u);
-  oscLFO.setFreq(10); // default frequency
-  
-  startMozzi(CONTROL_RATE); 
-}
-
-
-void HandleProgramChange (byte channel, byte number)
-{
-  //  Use MIDI Program Change to select an interval between carrier and modulator oscillator
-  modOffset = modOffsets[number % 15];
-}
-
-void HandleNoteOn(byte channel, byte note, byte velocity)
-{ 
-  aPortamento.start((byte)(((int) note) - 5)); 
-
-  lastnote = note;
-  envelope.noteOn();
-
-  digitalWrite(LED, HIGH);
-}
-
-void HandleContinue ()
-{
-  portSpeed += 100; 
-
-  if (portSpeed > 500)
-  {
-    portSpeed = 0;
-  }
-
-  aPortamento.setTime(portSpeed);
-}
-
-void HandleNoteOff(byte channel, byte note, byte velocity)
-{
-  if (note == lastnote)
-  {
-    envelope.noteOff();
-    digitalWrite(LED, LOW);
-  }
-}
-
-void HandlePitchBend (byte channel, int bend)
-{
-  float shifted = float ((bend + 8500) / 2048.f) + 0.1f;  
-  oscLFO.setFreq(shifted);
-}
-
-void HandleControlChange (byte channel, byte number, byte value)
-{
-  if(number == 1)
-  {
-    float divided = float(value / 46.f);
-    modDepth = (divided * divided);
-    if (modDepth > 5)
-    {
-      modDepth = 5;
-    }
-    if (modDepth < 0.2)
-    {
-      modDepth = 0;
-    }
-  }
-}
-
-void updateControl()
-{
-  MIDI.read();
-  envelope.update();
-  carrierFreq = Q16n16_to_float (aPortamento.next()); //NB presumably returns frequency as Q16n16
-  modFreq = carrierFreq * modOffset; 
-  oscCarrier.setFreq(carrierFreq);
-  oscModulator.setFreq(modFreq);
-}
-
-int updateAudio()
-{
-  vibrato = (unsigned long) (oscLFO.next() * oscModulator.next()) >> 7;
-  vibrato *= (unsigned long) (carrierFreq * modDepth) >> 3;
-  return (int) ((oscCarrier.phMod(vibrato)) * (envelope.next())) >> 7;
-}
-
-void loop()
-{
-  audioHook();
-} 
-