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113 lines
3.6 KiB
113 lines
3.6 KiB
#include <MIDI.h>
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#define TGA_PRO_REVB
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#define TGA_PRO_EXPAND_REV2
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#include "BAGuitar.h"
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using namespace midi;
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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 codec;
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//#define USE_EXT // uncomment this line to use External MEM0
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#ifdef USE_EXT
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// If using external SPI memory, we will instantiance an SRAM
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// manager and create an external memory slot to use as the memory
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// for our audio delay
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ExternalSramManager externalSram;
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ExtMemSlot delaySlot; // Declare an external memory slot.
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// Instantiate the AudioEffectAnalogDelay to use external memory by
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/// passing it the delay slot.
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AudioEffectAnalogDelay analogDelay(&delaySlot);
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#else
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// If using internal memory, we will instantiate the AudioEffectAnalogDelay
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// by passing it the maximum amount of delay we will use in millseconds. Note that
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// audio delay lengths are very limited when using internal memory due to limited
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// internal RAM size.
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AudioEffectAnalogDelay analogDelay(200.0f); // max delay of 200 ms.
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#endif
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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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// Simply connect the input to the delay, and the output
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// to both i2s channels
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AudioConnection input(i2sIn,0, analogDelay,0);
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AudioConnection delayOut(analogDelay, 0, cabFilter, 0);
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AudioConnection leftOut(cabFilter,0, i2sOut, 0);
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AudioConnection rightOut(cabFilter,0, i2sOut, 1);
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//////////////////////////////////////////
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// SETUP PHYSICAL CONTROLS
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//////////////////////////////////////////
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BAPhysicalControls controls(BA_EXPAND_NUM_SW, BA_EXPAND_NUM_POT, 0);
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int loopCount = 0;
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void setup() {
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delay(100);
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Serial.begin(57600); // Start the serial port
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delay(100);
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// Setup the controls
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controls.addSwitch(BA_EXPAND_SW1_PIN);
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controls.addSwitch(BA_EXPAND_SW2_PIN);
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controls.addPot(BA_EXPAND_POT1_PIN,
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// Disable the codec first
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codec.disable();
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AudioMemory(128);
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// Enable the codec
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Serial.println("Enabling codec...\n");
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codec.enable();
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// If using external memory request request memory from the manager
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// for the slot
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#ifdef USE_EXT
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Serial.println("Using EXTERNAL memory");
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// We have to request memory be allocated to our slot.
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externalSram.requestMemory(&delaySlot, 500.0f, MemSelect::MEM0, true);
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#else
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Serial.println("Using INTERNAL memory");
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#endif
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// Besure to enable the delay. When disabled, audio is is completely blocked
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// to minimize resources to nearly zero.
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analogDelay.enable();
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// Set some default values.
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// These can be changed using the controls on the Blackaddr Audio Expansion Board
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analogDelay.bypass(false);
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analogDelay.mix(0.5f);
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analogDelay.feedback(0.0f);
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//////////////////////////////////
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// AnalogDelay filter selection //
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// Uncomment to tryout the 3 different built-in filters.
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//analogDelay.setFilter(AudioEffectAnalogDelay::Filter::DM3); // The default filter. Naturally bright echo (highs stay, lows fade away)
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//analogDelay.setFilter(AudioEffectAnalogDelay::Filter::WARM); // A warm filter with a smooth frequency rolloff above 2Khz
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//analogDelay.setFilter(AudioEffectAnalogDelay::Filter::DARK); // A very dark filter, with a sharp rolloff above 1Khz
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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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if (loopCount % 524288 == 0) {
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Serial.print("Processor Usage, Total: "); Serial.print(AudioProcessorUsage());
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Serial.print("% ");
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Serial.print(" analogDelay: "); Serial.print(analogDelay.processorUsage());
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Serial.println("%");
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}
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loopCount++;
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}
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