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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
* Now with drums!
*/
#include <MIDI.h>
#include <MozziGuts.h>
#include <Oscil.h> // oscillator template
#include <Line.h> // for envelope
#include <Sample.h>
//#include <tables/sin2048_int8.h> // sine table for oscillator
#include <tables/saw2048_int8.h>
#include "kick909.h"
#include "snare909.h"
#include "hihatc909.h"
#include "hihato909.h"
#include <mozzi_midi.h>
#include <ADSR.h>
#include <fixedMath.h>
#include <LowPassFilter.h>
// use #define for CONTROL_RATE, not a constant
#define CONTROL_RATE 128 // powers of 2 please
unsigned long ctrlCounter = 0;
// audio sinewave oscillator
//Oscil <SIN2048_NUM_CELLS, AUDIO_RATE> osc(SIN2048_DATA);
Oscil <SAW2048_NUM_CELLS, AUDIO_RATE> osc(SAW2048_DATA);
// drums
Sample <kick909_NUM_CELLS, AUDIO_RATE> kickSamp(kick909_DATA);
Sample <snare909_NUM_CELLS, AUDIO_RATE> snareSamp(snare909_DATA);
Sample <hihatc909_NUM_CELLS, AUDIO_RATE> hihatcSamp(hihatc909_DATA);
Sample <hihato_NUM_CELLS, AUDIO_RATE> hihatoSamp(hihato_DATA);
byte pattern[4][16] = {
//0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 0 hhc
0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, // 1 hho
0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, // 2 snare
1, 0, 1, 0, 0, 0, 1, 1, 0, 1, 1, 0, 0, 0, 0, 1 // 3 kick
};
// envelope generator
ADSR <CONTROL_RATE> envelope;
LowPassFilter lpf;
int crushCtrl = 0;
#define LED 13 // to see if MIDI is being recieved
void HandleNoteOn(byte channel, byte note, byte velocity) {
//osc.setFreq(mtof(note)); // simple but less accurate frequency
osc.setFreq_Q16n16(Q16n16_mtof(Q8n0_to_Q16n16(note))); // accurate frequency
envelope.noteOn();
digitalWrite(LED,HIGH);
}
void HandleNoteOff(byte channel, byte note, byte velocity) {
envelope.noteOff();
digitalWrite(LED,LOW);
}
void HandleControlChange (byte channel, byte number, byte value)
{
// http://www.indiana.edu/~emusic/cntrlnumb.html
switch(number) {
//case 1: // modulation wheel
case 105:
lpf.setCutoffFreq(value*2); // control messages are in [0, 127] range
break;
case 106:
//lpf.setResonance(value*2);
crushCtrl = value;
break;
}
}
void setup() {
pinMode(LED, OUTPUT);
// Initiate MIDI communications, listen to all channels
MIDI.begin(MIDI_CHANNEL_OMNI);
// Connect the HandleNoteOn function to the library, so it is called upon reception of a NoteOn.
MIDI.setHandleNoteOn(HandleNoteOn); // Put only the name of the function
MIDI.setHandleNoteOff(HandleNoteOff); // Put only the name of the function
MIDI.setHandleControlChange(HandleControlChange);
envelope.setADLevels(127,64);
envelope.setTimes(50,200,10000,200); // 10000 is so the note will sustain 10 seconds unless a noteOff comes
lpf.setResonance(200);
lpf.setCutoffFreq(255);
osc.setFreq(440); // default frequency
kickSamp.setFreq((float) kick909_SAMPLERATE / (float) kick909_NUM_CELLS);
snareSamp.setFreq((float) snare909_SAMPLERATE / (float) snare909_NUM_CELLS);
hihatcSamp.setFreq((float) hihatc909_SAMPLERATE / (float) hihatc909_NUM_CELLS);
hihatoSamp.setFreq((float) hihato_SAMPLERATE / (float) hihato_NUM_CELLS);
//snareSamp.start();
startMozzi(CONTROL_RATE);
}
int beat = 0;
int oldBeat = 0;
void updateControl(){
MIDI.read();
envelope.update();
// drums
ctrlCounter++;
// this is called at 128Hz -> 120bmp!?
beat = ((ctrlCounter*2*4)>>7);
if (beat != oldBeat) {
if (pattern[0][beat&0xf]) hihatcSamp.start();
if (pattern[1][beat&0xf]) hihatoSamp.start();
if (pattern[2][beat&0xf]) snareSamp.start();
if (pattern[3][beat&0xf]) kickSamp.start();
}
oldBeat = beat;
}
// strip the low bits off!
int bitCrush(int x, int a)
{
return (x>>a)<<a;
}
int updateAudio(){
//return (int) (envelope.next() * osc.next())>>8;
// return (int) (envelope.next() * lpf.next(osc.next()))>>8;
int x = (int) (envelope.next() * osc.next())>>8;
//int x = (envelope.next() * lpf.next(osc.next()))>>8;
//x = bitCrush(x, crushCtrl>>4);
//x = (x * crushCtrl)>>4; // simple gain
//x = bitCrush(x, 6);
x = lpf.next(x);
// drums please!
int drums = kickSamp.next() + snareSamp.next() + hihatcSamp.next() + hihatoSamp.next();
x += drums<<1;
return x;
}
void loop() {
audioHook(); // required here
}
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