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AudioZero

play()

Description

Writes an audio signal read from the SD card to DAC0.

Syntax

AudioZero.play();

Returns

nothing

Example

/*
  Simple Audio Player for Arduino Zero

 Demonstrates the use of the Audio library for the Arduino Zero

 Hardware required :
 * Arduino shield with a SD card on CS4
 * A sound file named "test.wav" in the root directory of the SD card
 * An audio amplifier to connect to the DAC0 and ground
 * A speaker to connect to the audio amplifier


 Arturo Guadalupi <a.guadalupi@arduino.cc>
 Angelo Scialabba <a.scialabba@arduino.cc>
 Claudio Indellicati <c.indellicati@arduino.cc>

 This example code is in the public domain

 http://arduino.cc/en/Tutorial/SimpleAudioPlayerZero

*/

#include <SD.h>
#include <SPI.h>
#include <AudioZero.h>

void setup()
{
  // debug output at 115200 baud
  Serial.begin(115200);

  // setup SD-card
  Serial.print("Initializing SD card...");
  if (!SD.begin(4)) {
    Serial.println(" failed!");
    return;
  }
  Serial.println(" done.");
  // hi-speed SPI transfers
  SPI.setClockDivider(4);

  // 88200 sample rate
  AudioZero.begin(88200);
}

void loop()
{
  int count = 0;

  // open wave file from sdcard
  File myFile = SD.open("test.wav");
  if (!myFile) {
    // if the file didn't open, print an error and stop
    Serial.println("error opening test.wav");
    while (true);
  }

  Serial.print("Playing");

  // until the file is not finished  
  AudioZero.play(myFile);
  AudioZero.end();

  Serial.println("End of file. Thank you for listening!");
  while (true) ;
}
 
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The text of the Arduino reference is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.