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/*************************************************************************
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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 example demonstrates teh AudioEffectsTremolo effect. It can |
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* be controlled using USB MIDI. You can get a free USB MIDI Controller |
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* appliation at
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* http://www.blackaddr.com/downloads/BAMidiTester/
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* or the source code at |
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* https://github.com/Blackaddr/BAMidiTester
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*
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* Even if you don't control the guitar effect with USB MIDI, you must set |
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* the Arduino IDE USB-Type under Tools to "Serial + MIDI" |
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*/ |
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#include <MIDI.h> |
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#include "BALibrary.h" |
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#include "BAEffects.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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/// IMPORTANT /////
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// YOU MUST USE TEENSYDUINO 1.41 or greater
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// YOU MUST COMPILE THIS DEMO USING Serial + Midi
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//#define USE_EXT // uncomment this line to use External MEM0
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#define MIDI_DEBUG // uncomment to see raw MIDI info in terminal
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AudioEffectTremolo tremolo; |
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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 tremolo, and the output
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// to both i2s channels
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AudioConnection input(i2sIn,0, tremolo,0); |
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AudioConnection tremoloOut(tremolo, 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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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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// Disable the codec first
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codec.disable(); |
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delay(100); |
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AudioMemory(128); |
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delay(5); |
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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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delay(100); |
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// Configure which MIDI CC's will control the effect parameters
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tremolo.mapMidiControl(AudioEffectTremolo::BYPASS,16); |
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tremolo.mapMidiControl(AudioEffectTremolo::RATE,20); |
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tremolo.mapMidiControl(AudioEffectTremolo::DEPTH,21); |
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tremolo.mapMidiControl(AudioEffectTremolo::VOLUME,22); |
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// Besure to enable the tremolo. When disabled, audio is is completely blocked
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// to minimize resources to nearly zero.
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tremolo.enable();
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// Set some default values.
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// These can be changed by sending MIDI CC messages over the USB using
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// the BAMidiTester application.
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tremolo.rate(0.5f); // initial LFO rate of 1/2 max which is about 10 Hz
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tremolo.bypass(false); |
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tremolo.depth(0.5f); // 50% depth modulation
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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 OnControlChange(byte channel, byte control, byte value) { |
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tremolo.processMidi(channel, control, value); |
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#ifdef MIDI_DEBUG |
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Serial.print("Control Change, ch="); |
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Serial.print(channel, DEC); |
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Serial.print(", control="); |
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Serial.print(control, DEC); |
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Serial.print(", value="); |
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Serial.print(value, DEC); |
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Serial.println(); |
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#endif |
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} |
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void loop() { |
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// usbMIDI.read() needs to be called rapidly from loop(). When
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// each MIDI messages arrives, it return true. The message must
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// be fully processed before usbMIDI.read() is called again.
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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(" tremolo: "); Serial.print(tremolo.processorUsage()); |
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Serial.println("%"); |
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} |
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loopCount++; |
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// check for new MIDI from USB
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if (usbMIDI.read()) { |
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// this code entered only if new MIDI received
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byte type, channel, data1, data2, cable; |
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type = usbMIDI.getType(); // which MIDI message, 128-255
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channel = usbMIDI.getChannel(); // which MIDI channel, 1-16
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data1 = usbMIDI.getData1(); // first data byte of message, 0-127
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data2 = usbMIDI.getData2(); // second data byte of message, 0-127
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Serial.println(String("Received a MIDI message on channel ") + channel); |
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if (type == MidiType::ControlChange) { |
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// if type is 3, it's a CC MIDI Message
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// Note: the Arduino MIDI library encodes channels as 1-16 instead
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// of 0 to 15 as it should, so we must subtract one.
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OnControlChange(channel-1, data1, data2); |
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} |
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} |
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} |
@ -0,0 +1,19 @@ |
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// To give your project a unique name, this code must be
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// placed into a .c file (its own tab). It can not be in
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// a .cpp file or your main sketch (the .ino file).
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#include "usb_names.h" |
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// Edit these lines to create your own name. The length must
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// match the number of characters in your custom name.
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#define MIDI_NAME {'B','l','a','c','k','a','d','d','r',' ','A','u','d','i','o',' ','T','G','A',' ','P','r','o'} |
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#define MIDI_NAME_LEN 23 |
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// Do not change this part. This exact format is required by USB.
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struct usb_string_descriptor_struct usb_string_product_name = { |
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2 + MIDI_NAME_LEN * 2, |
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3, |
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MIDI_NAME |
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}; |
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