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75 lines
2.5 KiB
75 lines
2.5 KiB
/*************************************************************************
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* This demo uses the BAGuitar library to provide enhanced control of
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* the TGA Pro board.
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*
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* The latest copy of the BA Guitar library can be obtained from
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* https://github.com/Blackaddr/BAGuitar
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*
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* This demo provides an example guitar tone consisting of some slap-back delay,
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* followed by a reverb and a low-pass cabinet filter.
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*
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*/
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#include <Wire.h>
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#include <Audio.h>
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#include <MIDI.h>
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#include "BAGuitar.h"
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using namespace BAGuitar;
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BAAudioControlWM8731 codecControl;
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AudioInputI2S i2sIn;
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AudioOutputI2S i2sOut;
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AudioMixer4 gainModule; // This will be used simply to reduce the gain before the reverb
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AudioEffectDelay delayModule; // we'll add a little slapback echo
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AudioEffectReverb reverb; // Add a bit of 'verb to our tone
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AudioMixer4 mixer; // Used to mix the original dry with the wet (effects) path.
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AudioFilterBiquad cabFilter; // We'll want something to cut out the highs and smooth the tone, just like a guitar cab.
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// Audio Connections
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AudioConnection patchIn(i2sIn,0, delayModule, 0); // route the input to the delay
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AudioConnection patch2(delayModule,0, gainModule, 0); // send the delay to the gain module
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AudioConnection patch2b(gainModule, 0, reverb, 0); // then to the reverb
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AudioConnection patch1(i2sIn,1, mixer,0); // mixer input 0 is our original dry signal
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AudioConnection patch3(reverb, 0, mixer, 1); // mixer input 1 is our wet
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AudioConnection patch4(mixer, 0, cabFilter, 0); // mixer outpt to the cabinet filter
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AudioConnection patch5(cabFilter, 0, i2sOut, 0); // connect the cab filter to the output.
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void setup() {
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delay(5); // wait a few ms to make sure the GTA Pro is fully powered up
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AudioMemory(48);
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// If the codec was already powered up (due to reboot) power itd own first
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codecControl.disable();
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delay(100);
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codecControl.enable();
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delay(100);
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// Configure our effects
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delayModule.delay(0, 50.0f); // 50 ms slapback delay
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gainModule.gain(0, 0.25); // the reverb unit clips easily if the input is too high
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mixer.gain(0, 1.0f); // unity gain on the dry
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mixer.gain(1, 1.0f); // unity gain on the wet
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// Setup 2-stages of LPF, cutoff 4500 Hz, Q-factor 0.7071 (a 'normal' Q-factor)
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cabFilter.setLowpass(0, 4500, .7071);
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cabFilter.setLowpass(1, 4500, .7071);
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}
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void loop() {
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// The audio flows automatically through the Teensy Audio Library
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}
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