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Feb 11, 2020
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Update links in Mbed_USB_WAV_Audio_Player.md #1225

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50 changes: 2 additions & 48 deletions docs/api/usb/Mbed_USB_WAV_Audio_Player/Mbed_USB_WAV_Audio_Player.md
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Expand Up @@ -81,57 +81,11 @@ If USB properties of the Mbed USB WAV Audio Player are altered, such as the samp

## main.cpp

```c++ NOCI
// Mbed WAV Audio Player
#include "mbed.h"
#include "USBAudio.h"
#include "SDBlockDevice.h"
#include "FATFileSystem.h"
#include "AudioPlayer.h"
#include "WaveAudioStream.h"

// Connection for SD card
SDBlockDevice sd(PTE3, PTE1, PTE2, PTE4);//MOSI, MISO, SCLK, CS
FATFileSystem fs("sd", &sd);

int main() {
// Set the maximum speed so it can keep up with audio
sd.frequency(25000000);
// Load WAV file from SD card
// WAV file must be PCM signed 16-bit little endian
File file;
if (file.open(&fs, "songs/Bach-minuet-in-g.wav") != 0) {
error("Could not open 'songs/Bach-minuet-in-g.wav'\r\n");
}
WaveAudioStream song(&file);//"song" is the audio data object
// Check to see if file is a valid WAV file
if(song.get_valid() == 0){
error("ERROR: not valid WAV file\r\n");
}
// WAV file must be 16-bit
if(song.get_bytes_per_sample() != 2){
error("ERROR: WAV file not 2 bytes per sample (16-bit)\r\n");
}
USBAudio audio(true, 8000, song.get_channels(), song.get_sample_rate(), song.get_channels());
uint8_t buffer[1500];
int num_bytes_read;
printf("Playing Audio\r\n");
// Reads and plays data from WAV file over USB until song is over
while(1){
num_bytes_read = song.read(buffer, 1500);
if(num_bytes_read == -1){
printf("Song Over\r\n");
break;
}
audio.write(buffer, num_bytes_read);
}
song.close();//Close the WAV file
}
```
[![View code](https://www.mbed.com/embed/?url=https://github.com/ARMmbed/mbed-os-examples-docs_only/blob/master/APIs_USB/USBAudio_wav_audio_player)](https://github.com/ARMmbed/mbed-os-examples-docs_only/blob/master/APIs_USB/USBAudio_wav_audio_player/main.cpp)

## Example WAV file

[Bach-minuet-in-g.wav](https://github.com/mrcoulter45/mbed-os-5-docs/raw/Mbed_USB_WAV_Audio_Player_Tutorial/docs/tutorials/using_apis/Mbed_USB_WAV_Audio_Player/Bach-minuet-in-g.wav)
[Bach-minuet-in-g.wav](https://github.com/ARMmbed/mbed-os-examples-docs_only/blob/master/APIs_USB/USBAudio_wav_audio_player/Bach-minuet-in-g.wav)

## Troubleshooting

Expand Down