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BALibrary/examples/Delay/SoundOnSoundDemo/SoundOnSoundDemo.ino

191 lines
5.8 KiB

/*************************************************************************
* This demo uses the BALibrary library to provide enhanced control of
* the TGA Pro board.
*
* The latest copy of the BA Guitar library can be obtained from
* https://github.com/Blackaddr/BALibrary
*
* THIS DEMO REQUIRES THE EXTERNAL SRAM MEM0
*
* This demo combines MIDI control with the BAAudioEffectSoundOnSound. You can use
* the BAMidiTester to control the effect but it's best to use external MIDI footswitch
* or the Blackaddr Audio Expansion Control Board.
*
* User must set the Arduino IDE USB-Type to "Serial + MIDI" in the Tools menu.
*
* Afters startup, the effect will spend about 5 seconds clearing the audio delay buffer to prevent
* any startup pops or clicks from propagating.
*
*/
#include <Audio.h>
#include <MIDI.h>
#include "BALibrary.h"
#include "BAEffects.h"
/// IMPORTANT /////
// YOU MUST USE TEENSYDUINO 1.41 or greater
// YOU MUST COMPILE THIS DEMO USING Serial + Midi
//#define USE_CAB_FILTER // uncomment this line to add a simple low-pass filter to simulate a cabinet if you are going straight to headphones
#define MIDI_DEBUG
using namespace midi;
MIDI_CREATE_DEFAULT_INSTANCE();
using namespace BAEffects;
using namespace BALibrary;
AudioInputI2S i2sIn;
AudioOutputI2S i2sOut;
BAAudioControlWM8731 codec;
// External SRAM is required for this effect due to the very long
// delays required.
ExternalSramManager externalSram;
ExtMemSlot delaySlot; // Declare an external memory slot.
AudioEffectSOS sos(&delaySlot);
// Add some effects for our soloing channel
AudioEffectDelay delayModule; // we'll add a little slapback echo
AudioMixer4 gainModule; // This will be used simply to reduce the gain before the reverb
AudioEffectReverb reverb; // Add a bit of 'verb to our tone
AudioMixer4 mixer;
#if defined(USE_CAB_FILTER)
AudioFilterBiquad cabFilter; // We'll want something to cut out the highs and smooth the tone, just like a guitar cab.
#endif
// Connect the input
AudioConnection inputToSos(i2sIn, 0, sos, 0);
AudioConnection inputToSolo(i2sIn, 0, delayModule, 0);
// Patch cables for the SOLO channel
AudioConnection inputToGain(delayModule, 0, gainModule, 0);
AudioConnection inputToReverb(gainModule, 0, reverb, 0);
// Output Mixer
AudioConnection mixer0input(i2sIn, 0, mixer, 0); // SOLO Dry Channel
AudioConnection mixer1input(reverb, 0, mixer, 1); // SOLO Wet Channel
AudioConnection mixer2input(sos, 0, mixer, 2); // SOS Channel
#if defined(USE_CAB_FILTER)
AudioConnection inputToCab(mixer, 0, cabFilter, 0);
AudioConnection outputLeft(cabFilter, 0, i2sOut, 0);
AudioConnection outputRight(cabFilter, 0, i2sOut, 1);
#else
AudioConnection outputLeft(mixer, 0, i2sOut, 0);
AudioConnection outputRight(mixer, 0, i2sOut, 1);
#endif
elapsedMillis timer;
void OnControlChange(byte channel, byte control, byte value) {
sos.processMidi(channel-1, control, value);
#ifdef MIDI_DEBUG
if (Serial) {
Serial.print("Control Change, ch=");
Serial.print(channel, DEC);
Serial.print(", control=");
Serial.print(control, DEC);
Serial.print(", value=");
Serial.print(value, DEC);
Serial.println();
}
#endif
}
void setup() {
TGA_PRO_MKII_REV1(); // Declare the version of the TGA Pro you are using.
//TGA_PRO_REVB(x);
//TGA_PRO_REVA(x);
SPI_MEM0_64M(); // Optional 64Mbit SPI RAM
//SPI_MEM0_4M(); // Older REVB / REVA boards offered 1M or 4M
//SPI_MEM0_1M();
delay(100);
Serial.begin(57600); // Start the serial port
// Disable the codec first
codec.disable();
AudioMemory(128);
SPI_MEM0_1M(); // Configure the SPI memory size
// Enable the codec
if (Serial) { Serial.println("Enabling codec...\n"); }
codec.enable();
// We have to request memory be allocated to our slot.
externalSram.requestMemory(&delaySlot, BAHardwareConfig.getSpiMemSizeBytes(MemSelect::MEM0), MemSelect::MEM0, true);
delaySlot.clear();
// Setup MIDI
MIDI.begin(MIDI_CHANNEL_OMNI);
MIDI.setHandleControlChange(OnControlChange);
usbMIDI.setHandleControlChange(OnControlChange);
// Configure the LED to indicate the gate status
sos.setGateLedGpio(USR_LED_ID);
// Configure which MIDI CC's will control the effect parameters
//sos.mapMidiControl(AudioEffectSOS::BYPASS,16);
sos.mapMidiControl(AudioEffectSOS::GATE_TRIGGER,16);
sos.mapMidiControl(AudioEffectSOS::CLEAR_FEEDBACK_TRIGGER,17);
sos.mapMidiControl(AudioEffectSOS::GATE_OPEN_TIME,20);
sos.mapMidiControl(AudioEffectSOS::GATE_CLOSE_TIME,21);
sos.mapMidiControl(AudioEffectSOS::VOLUME,22);
//sos.mapMidiControl(AudioEffectSOS::FEEDBACK,24);
// Besure to enable the delay. When disabled, audio is is completely blocked
// to minimize resources to nearly zero.
sos.enable();
// Set some default values.
// These can be changed by sending MIDI CC messages over the USB using
// the BAMidiTester application.
sos.bypass(false);
sos.gateOpenTime(3000.0f);
sos.gateCloseTime(1000.0f);
sos.feedback(0.9f);
// Setup effects on the SOLO channel
gainModule.gain(0, 0.25); // the reverb unit clips easily if the input is too high
delayModule.delay(0, 50.0f); // 50 ms slapback delay
#if defined(USE_CAB_FILTER)
// Setup 2-stages of LPF, cutoff 4500 Hz, Q-factor 0.7071 (a 'normal' Q-factor)
cabFilter.setLowpass(0, 4500, .7071);
cabFilter.setLowpass(1, 4500, .7071);
#endif
// Setup the Mixer
mixer.gain(0, 0.5f); // SOLO Dry gain
mixer.gain(1, 0.5f); // SOLO Wet gain
mixer.gain(1, 1.0f); // SOS gain
delay(1000);
sos.clear();
}
void loop() {
// usbMIDI.read() needs to be called rapidly from loop().
if (timer > 1000) {
timer = 0;
if (Serial) {
Serial.print("Processor Usage, Total: "); Serial.print(AudioProcessorUsage());
Serial.print("% ");
Serial.print(" SOS: "); Serial.print(sos.processorUsage());
Serial.println("%");
}
}
MIDI.read();
usbMIDI.read();
}