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libraries/audio-tools/examples/examples-dsp/examples-maximilian/19-Enveloping2/19-Enveloping2.ino

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+
+//this tutorial explains how to use the maxiEnv
+
+#include "AudioTools.h"
+#include "AudioTools/AudioLibs/MaximilianDSP.h"
+#include "audio/cello_open_string_bowed.h"
+
+// Arduino output
+I2SStream out;
+Maximilian maximilian(out);
+
+// Maximilian
+maxiSample sound1;
+maxiOsc timer,snarePhase; //and a timer
+maxiEnv envelope;//this is going to be an envelope
+int currentCount,lastCount,playHead,
+sequence[16]={1,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0}; //This is the sequence for the kick
+int sampleTrigger;
+float sampleOut;
+
+void setup() {//some inits
+    // setup logging
+    Serial.begin(115200);
+    AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Info);
+
+    // setup audio output
+    auto cfg = out.defaultConfig(TX_MODE);
+    out.begin(cfg);
+    maximilian.begin(cfg);
+	
+    //YOU HAVE TO PROVIDE THE SAMPLES....    
+	//sound1.load("/Users/mickgrierson/Documents/audio/68373__juskiddink__Cello_open_string_bowed.wav");//load in your samples. Provide the full path to a wav file.
+	sound1.setSample(cello_open_string_bowed_vector);
+	
+	Serial.println(sound1.getSummary().c_str());//get info on samples if you like.
+}
+
+void play(float *output) {//this is where the magic happens. Very slow magic.
+	
+	currentCount=(int)timer.phasor(8);//this sets up a metronome that ticks 8 times a second
+
+	if (lastCount!=currentCount) {//if we have a new timer int this sample, play the sound		
+		sampleTrigger=sequence[playHead%16];
+		playHead++;//iterate the playhead
+		lastCount=0;//reset the metrotest
+	}
+	
+	//the envelope we're using here is an AR envelope.
+	//It has an input (which in this case is a sound)
+	//It has an attack coefficient, a hold val (in samples)
+	//and a release coefficient. Finally, it has a trigger input.
+	//If you stick a 1 in the trigger input, it retriggers the envelope
+	sampleOut=envelope.ar(sound1.playAtSpeed(1.0), 0.1, 0.9999, 1, sampleTrigger); //
+		
+	output[0]=sampleOut;//left channel
+	output[1]=sampleOut;//right channel
+	
+	sampleTrigger = 0;//set trigger to 0 at the end of each sample to guarantee retriggering.
+
+}
+
+// Arduino loop
+void loop() {
+    maximilian.copy();
+}
+