This page provides information and some examples for the use of the RS Audio Codec sub board, based on TI's TLV320 chip. This chip provides a high quality audio link out and in to the mbed with IO including: an amplified stereo headphone out, an stereo line out, a stereo line in and an pre-amped mono microphone input. Such a capable chip opens up a lot of options for high quality audio on mbed.

One can get this board from RS: AudioCODEC for mbed

The easiest way to get something working is to load a test wave file (such as this one or this one) onto a flash drive, plug it into the Lab Board and load up this program:

00001 // This is all set up for the RS Labboard: Just plug a memory stick with a wav file called test.wav on it and have a listen!
00002 
00003 #include "mbed.h"
00004 #include "WavPlayer.h"
00005 #include "MSCFileSystem.h"
00006 
00007 MSCFileSystem msc("msc"); // Mount flash drive under the name "msc"
00008 WavPlayer player;
00009 
00010 int main() {
00011     FILE *fp = fopen("/msc/test.wav", "r");  // Open "out.txt" on the local file system for writing
00012     player.open(&fp);
00013     player.play();
00014     fclose(fp);
00015 }

The easiest way to get something working is to load a test wave file (such as this one or this one) onto a flash drive, plug it into the Lab Board and load up this program:

or just this one:

Both programs use the TLV320 library and the I2S library:

A WAV library was written to make the process of playing wave files easier: