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154 lines
4.0 KiB
154 lines
4.0 KiB
// test of DaisySP synth object for the Teensy audio library
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#include <Audio.h>
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#include <Metro.h>
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Metro five_sec=Metro(5000); // Set up a 5 second Metro
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Metro trigger=Metro(250); // envelope trigger
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#include "daisysp.h"
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using namespace daisysp;
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// including the source files is a pain but that way you compile in only the modules you need
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// DaisySP statically allocates memory and some modules e.g. reverb use a lot of ram
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#include "synthesis/oscillator.cpp"
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#include "control/adenv.cpp"
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#include "filters/moogladder.cpp"
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#include "effects/reverbsc.cpp" // uses a LOT of ram
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// constants for integer to float and float to integer conversion
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#define MULT_16 2147483647
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#define DIV_16 4.6566129e-10
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float samplerate=AUDIO_SAMPLE_RATE_EXACT;
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// create daisySP processing objects
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#define NUM_OSCS 4
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Oscillator osc[NUM_OSCS];
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Oscillator lfo;
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AdEnv env;
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MoogLadder filt;
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ReverbSc verb;
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AudioOutputI2S out;
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AudioOutputUSB outUSB;
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AudioControlSGTL5000 audioShield;
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AudioSynthDaisySP synth; // create the daisysp synth audio object
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AudioConnection patchCord20(synth,0,out,0);
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AudioConnection patchCord21(synth,0,out,1);
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AudioConnection patchCord22(synth,0,outUSB,0);
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AudioConnection patchCord23(synth,0,outUSB,1);
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// this is the function called by the AudioSynthDaisySP object when it needs a block of samples
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void AudioSynthDaisySP::update(void)
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{
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float out,sig, envelope, filtsig, sendsig, wetvl, wetvr;
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audio_block_t *block;
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block = allocate(); // grab an audio block
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if (!block) {
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return;
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}
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for (int i=0; i < AUDIO_BLOCK_SAMPLES; i++) {
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//**** insert daisySP generators here
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sig=0; // sum up oscillators
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for (int i=0; i<NUM_OSCS;++i) {
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sig+=osc[i].Process();
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}
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sig=sig/NUM_OSCS; // scale the sum
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envelope=env.Process();
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sig=sig* envelope;
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filt.SetFreq(200+ envelope*3000*(lfo.Process()+1));
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filtsig =filt.Process(sig);
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//filtsig = filt.Low();
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sendsig = filtsig*20;
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// sendsig=sendsig*5; // crank the level a bit
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verb.Process(sendsig, sendsig, &wetvl, &wetvr);
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out=sendsig + wetvl*0.1;
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// convert generated float value -1.0 to +1.0 to int16 used by Teensy Audio
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int32_t val = out*MULT_16;
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block->data[i] = val >> 16;
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}
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transmit(block);
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release(block);
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}
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void setup() {
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// Init Serial
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Serial.begin(38400);
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// wait for Arduino Serial Monitor to be ready
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// while (!Serial);
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Serial.println("starting setup");
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for (int i=0; i<NUM_OSCS;++i) {
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osc[i].Init(samplerate); // Init oscillator
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osc[i].SetFreq(80+i);
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osc[i].SetWaveform(Oscillator::WAVE_SAW); // saw
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}
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lfo.Init(samplerate); // Init oscillator
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lfo.SetFreq(0.1);
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env.Init(samplerate);
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env.SetCurve(-15.0f);
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env.SetTime(ADENV_SEG_ATTACK, 0.020f);
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env.SetTime(ADENV_SEG_DECAY, 0.6f);
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env.SetMax(1.f);
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env.SetMin(0.f);
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filt.Init(samplerate);
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filt.SetRes(0.6f);
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// filt.SetDrive(0.8f);
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filt.SetFreq(2400.0f);
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verb.Init(samplerate);
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verb.SetFeedback(0.87);
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verb.SetLpFreq(10000.0f);
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// Enable the AudioShield
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AudioMemory(10); // only need 2 blocks for 1 daisySP object
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audioShield.enable();
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audioShield.volume(0.3);
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Serial.println("finished setup");
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}
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float freq=1000.0, amp;
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void loop() {
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float offset=-3.0/NUM_OSCS;
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for (int i=0; i<NUM_OSCS;++i) {
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//osc[i].Init(44100); // Init oscillator
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offset=offset+6/NUM_OSCS;
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osc[i].SetFreq(100+offset);
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//osc[i].SetWaveform(Oscillator::WAVE_POLYBLEP_SAW); // saw
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// osc[i].SetWaveform[Oscillator::WAVE_RAMP]; // enum doesn't work consistently - compiler bug?
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}
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if (trigger.check() == 1) env.Trigger();
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// audio stats
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if (five_sec.check() == 1)
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{
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Serial.print("Proc = ");
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Serial.print(AudioProcessorUsage());
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Serial.print(" (");
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Serial.print(AudioProcessorUsageMax());
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Serial.print("), Mem = ");
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Serial.print(AudioMemoryUsage());
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Serial.print(" (");
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Serial.print(AudioMemoryUsageMax());
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Serial.println(")");
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}
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}
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