54 lines
1.9 KiB
C++
Executable File
54 lines
1.9 KiB
C++
Executable File
// This example shows how you can create a basic counter with a phasor.
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// A phasor oscillator can create a ramp between any two values.
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// It takes three inputs - frequency, start value and stop value.
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// These are all double precision floats, so it's a continuous slide.
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// If you write it into an integer, it will round it off for you.
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// This creates a bunch of steps.
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#include "AudioTools.h"
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#include "AudioTools/AudioLibs/MaximilianDSP.h"
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// Define Arduino output
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I2SStream out;
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Maximilian maximilian(out);
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// Maximilian
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maxiOsc myCounter,mySquare;//these oscillators will help us count and play sound
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int CurrentCount;//we're going to put the current count in this variable so that we can use it more easily.
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void setup() {//some inits
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// setup logging
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Serial.begin(115200);
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AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Info);
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// setup audio output
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auto cfg = out.defaultConfig(TX_MODE);
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out.begin(cfg);
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maximilian.begin(cfg);
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}
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void play(float *output) {
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// Here you can see that CurrentCount is an int. It's taking the continuous output of the phasor and convering it.
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// You don't need to explicityly 'cast' (i.e. change) the value from a float to an int.
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// It happens automagically in these cases.
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// Once every second, CurrentCount counts from 1 until it gets to 9, then resets itself.
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// When it reaches 9 it resets, so the values you get are 1-8.
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CurrentCount=myCounter.phasorBetween(1.0, 1.0, 9.0);//phasor can take three arguments; frequency, start value and end value.
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// If we multiply the output of CurrentCount by 100, we get 100,200,300,400,500,600,700,800 in that order.
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// These become the frequency of the oscillator.
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// In this case, the oscillator is an antialiased sawtooth wave. Yum.
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output[0]=mySquare.sawn(CurrentCount*100);
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output[1]=output[0];
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}
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// Arduino loop
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void loop() {
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maximilian.copy();
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}
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