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https://github.com/thestk/stk
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Version 4.2.0
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committed by
Stephen Sinclair
parent
cf06b7598b
commit
a6381b9d38
@@ -1,66 +1,8 @@
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/*! \page instruments Instruments
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The ToolKit comes with a wide variety of synthesis algorithms, all of which inherit from the Instrmnt class. In this example, we'll fire up an instance of the BeeThree FM synthesis class and show how it's frequency can be modified over time.
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The ToolKit comes with a wide variety of synthesis algorithms, all of which inherit from the Instrmnt class. In this example, we'll fire up an instance of the BeeThree FM synthesis class and show how its frequency can be modified over time.
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\code
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// bethree.cpp
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#include "BeeThree.h"
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#include "RtWvOut.h"
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int main()
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{
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// Set the global sample rate before creating class instances.
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Stk::setSampleRate( 44100.0 );
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Instrmnt *instrument = 0;
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RtWvOut *output = 0;
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MY_FLOAT frequency, amplitude, scaler;
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long counter, i;
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try {
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// Define and load the BeeThree instrument
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instrument = new BeeThree();
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// Define and open the default realtime output device for one-channel playback
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output = new RtWvOut(1);
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}
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catch (StkError &) {
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goto cleanup;
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}
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scaler = 1.0;
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frequency = 220.0;
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amplitude = 0.5;
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instrument->noteOn( frequency, amplitude );
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// Play the instrument for 80000 samples, changing the frequency every 2000 samples
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counter = 0;
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while ( counter < 80000 ) {
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for ( i=0; i<2000; i++ ) {
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try {
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output->tick( instrument->tick() );
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}
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catch (StkError &) {
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goto cleanup;
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}
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}
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counter += 2000;
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scaler += 0.025;
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instrument->setFrequency( frequency * scaler );
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}
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// Turn the instrument off with maximum decay envelope.
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instrument->noteOff( 1.0 );
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cleanup:
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delete instrument;
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delete output;
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return 0;
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}
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\endcode
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\include bethree.cpp
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We have used an Instrmnt pointer when referencing the BeeThree instance above, so it would be simple to replace the BeeThree class with any other STK instrument class. It should be noted, however, that a few classes do not respond to the setFrequency() function (e.g., Shakers, Drummer).
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