/************************************************************************* * This demo uses only the built-in libraries provided with the Arudino * Teensy libraries. * * IT IS STRONGLY RECOMMENDED to use the BAGuitar Library located at * https://github.com/Blackaddr/BAGuitar * The BAGuitar library will made it easier to use the features of your * GTA Pro board, as well and configure it correctly to eliminate * unneccesary noise. * * The built-in support for the WM8731 codec in the Teensy Library is very * limited. Without proper configuration, the codec will produce a noisy * output. This is caused by the default configuration the WM8731 powers * up in. This can easily be corrected by installing the BAGuitar library * * For instructions on installing additional libraries follow the * instructions at https://www.arduino.cc/en/Guide/Libraries after downloading * the BAGuitar repo from github as a zip file. * */ #include #include #include AudioInputI2S i2sIn; AudioOutputI2S i2sOut; // Audio connections, just connect the I2S input directly to the I2S output. AudioConnection patch0(i2sIn,0, i2sOut, 0); AudioConnection patch1(i2sIn,1, i2sOut, 1); AudioControlWM8731 codecControl; // needed to enable the codec unsigned long t=0; const int usrLED = 16; // the location of the GTA Pro user LED (not the LED on the Teensy itself) int usrLEDState = 0; void setup() { // Configure the user LED pin as output pinMode(usrLED, OUTPUT); digitalWrite(usrLED, usrLEDState); // Enable the MIDI to listen on all channels MIDI.begin(MIDI_CHANNEL_OMNI); Serial.begin(57600); // Enable the serial monitor Wire.begin(); // Enable the I2C bus for controlling the codec delay(5); delay(100); codecControl.disable(); // Turn off the codec first (in case it was in an unknown state) delay(100); AudioMemory(24); Serial.println("Enabling codec...\n"); codecControl.enable(); // Enable the codec delay(100); } void loop() { /////////////////////////////////////////////////////////////////////// // MIDI TESTING // Connect a loopback cable between the MIDI IN and MIDI OUT on the // GTA Pro. This test code will periodically send MIDI events which // will loop back and get printed in the Serial Monitor. /////////////////////////////////////////////////////////////////////// int type, note, velocity, channel, d1, d2; // Send MIDI OUT int cc, val=0xA, channelSend = 1; for (cc=32; cc<40; cc++) { MIDI.sendControlChange(cc, val, channelSend); val++; channelSend++; delay(100); MIDI.sendNoteOn(10, 100, channelSend); delay(100); } if (MIDI.read()) { // Is there a MIDI message incoming ? byte type = MIDI.getType(); Serial.println(String("MIDI IS WORKING!!!")); switch (type) { case NoteOn: note = MIDI.getData1(); velocity = MIDI.getData2(); channel = MIDI.getChannel(); if (velocity > 0) { Serial.println(String("Note On: ch=") + channel + ", note=" + note + ", velocity=" + velocity); } else { Serial.println(String("Note Off: ch=") + channel + ", note=" + note); } break; case NoteOff: note = MIDI.getData1(); velocity = MIDI.getData2(); channel = MIDI.getChannel(); Serial.println(String("Note Off: ch=") + channel + ", note=" + note + ", velocity=" + velocity); break; default: d1 = MIDI.getData1(); d2 = MIDI.getData2(); Serial.println(String("Message, type=") + type + ", data = " + d1 + " " + d2); } t = millis(); } // If no MIDI IN activity, print a message every 10 seconds if (millis() - t > 10000) { t += 10000; Serial.println("(no MIDI activity, check cables)"); } // Toggle the USR LED state usrLEDState = ~usrLEDState; digitalWrite(usrLED, usrLEDState); }