Digital voice recorder

Development Boards MicroMod
1

Hi

I´m a brazilian user of MSP microcontrollers, but I´m a beginner looking for learning more and more .

I´ve designing a digital voice recorder based on aplicattion note SLAA123 from TI.com, but with some differences in concept.

On my project, I´ll use a SD card to store the digital data SPI interface.

So, I did take a look on aplicattion note SLAA281A to build the interface and learn how programming the protocol for SD cards.

Will be necessary some changes on the source code because the first was wrote in assembly and the second in C, but my doubts are about the data format of the sound digitized.

On aplicattion note SLAA123, page 3, last paragraph is written :

" The digitized 12-bit voice data is directly stored in the flash without any compression "

On my project I must change the code to storage in the SD card, but the problem is :

  • The digitized 12-bit voice without compression can be read after by the PC for example, or will be necessary any compression, as MP3 to listen it?
2

A PC can play plain uncompressed audio, depending on what software you have on the PC. If you attach a [WAV header to the audio to tell the PC what the sample rate, etc., is then lots of programs can play it.](http://www.sonicspot.com/guide/wavefiles.html)