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105 lines
3.1 KiB
105 lines
3.1 KiB
/*************************************************************************
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* This demo uses the BALibrary 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/BALibrary
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*
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* This demo shows to use the BAAudioEffectDelayExternal audio class
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* to create long delays using external SPI RAM.
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*
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* Eight delay taps are configured from a single SRAM device.
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*
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*/
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#include <Audio.h>
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#include "BALibrary.h"
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#include "BAEffects.h"
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using namespace BAEffects;
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using namespace BALibrary;
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AudioInputI2S i2sIn;
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AudioOutputI2S i2sOut;
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BAAudioControlWM8731 codecControl;
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//AudioEffectDelayExternal longDelay;
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BAAudioEffectDelayExternal longDelay(MemSelect::MEM0); // comment this line to use MEM1
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//BAAudioEffectDelayExternal longDelay(MemSelect::MEM1); // and uncomment this one to use MEM1
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AudioMixer4 delayOutMixerA, delayOutMixerB, delayMixer;
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AudioConnection fromInput(i2sIn,0, longDelay, 0);
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AudioConnection fromDelay0(longDelay,0, delayOutMixerA,0);
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AudioConnection fromDelay1(longDelay,1, delayOutMixerA,1);
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AudioConnection fromDelay2(longDelay,2, delayOutMixerA,2);
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AudioConnection fromDelay3(longDelay,3, delayOutMixerA,3);
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AudioConnection fromDelay4(longDelay,4, delayOutMixerB,0);
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AudioConnection fromDelay5(longDelay,5, delayOutMixerB,1);
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AudioConnection fromDelay6(longDelay,6, delayOutMixerB,2);
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AudioConnection fromDelay7(longDelay,7, delayOutMixerB,3);
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AudioConnection fromDelayA(delayOutMixerA, 0, delayMixer, 0);
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AudioConnection fromDelayB(delayOutMixerB, 0, delayMixer, 1);
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AudioConnection dry(i2sIn, 0, delayMixer, 2);
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AudioConnection outputLeft(delayMixer, 0, i2sOut, 0);
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AudioConnection outputRight(delayMixer, 0, i2sOut, 1);
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void setup() {
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TGA_PRO_MKII_REV1(); // Declare the version of the TGA Pro you are using.
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//TGA_PRO_REVB(x);
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//TGA_PRO_REVA(x);
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SPI_MEM0_64M(); // Optional 64Mbit SPI RAM
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//SPI_MEM0_4M(); // Older REVB / REVA boards came with 4M or 1M
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//SPI_MEM0_1M();
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Serial.begin(57600);
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delay(200);
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AudioMemory(64);
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delay(500);
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Serial.println(String("Starting...\n"));
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delay(100);
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Serial.println("Enabling codec...\n");
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codecControl.enable();
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delay(100);
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// Set up 8 delay taps, each with evenly spaced, longer delays
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longDelay.delay(0, 150.0f);
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longDelay.delay(1, 300.0f);
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longDelay.delay(2, 450.0f);
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longDelay.delay(3, 600.0f);
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longDelay.delay(4, 750.0f);
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longDelay.delay(5, 900.0f);
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longDelay.delay(6, 1050.0f);
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longDelay.delay(7, 1200.0f);
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// mix the first four taps together with increasing attenuation (lower volume)
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delayOutMixerA.gain(0, 1.0f);
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delayOutMixerA.gain(1, 0.8f);
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delayOutMixerA.gain(2, 0.4f);
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delayOutMixerA.gain(3, 0.2f);
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// mix the next four taps with decreasing volume
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delayOutMixerB.gain(0, 0.1f);
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delayOutMixerB.gain(1, 0.05f);
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delayOutMixerB.gain(2, 0.025f);
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delayOutMixerB.gain(3, 0.0125f);
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// mix the original signal with the two delay mixers
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delayMixer.gain(0, 1.0f);
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delayMixer.gain(1, 1.0f);
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delayMixer.gain(2, 1.0f);
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}
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void loop() {
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}
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