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I want an IC to convert a .WAV (or MP3) file to I2S or analog audio

Don Dapkus
Guru**** 189399 points
Other Parts Discussed in Thread: PCM3052A, PCM2900B

As far as I am aware, TI does not make such an IC. This is a pretty complicated procedure for high-quality audio, and generally needs some pretty significant horsepower like a DSP (in the case of MP3 to decode it "real-time"). It gets even more complicated if you want to pull it off a USB thumbdrive, then you need some kind of USB host as well.

If you're just looking to make a simple voice-band announcement or something, then an MSP430 can probably do the work for you. I am not sure how you would convert the .wav file into the native format of the MSP430.

Comments from people who have done things like this?

-d2

  • Prodigy 90 points

    Again, depending upon your budget and what you wish to do with it, I am currently working on a similar solution that will receive raw audio, process it, and spit it back out.  I'm using a ti codec (PCM3052A) to convert the raw to i2s, then running it to an atmel processor for the processing (AT32UC3B256), then spitting it back out as i2s to the codec.  The atmel has the usb interface, and the horsepower to decode and process a wav file.

    Rob

  • in reply to Rob McPherson9415
    TI__Prodigy 10 points

    Rob,

    I'm pretty sure some of the TI DSPs have the capability of playing wav files from on-board ram or playing mp3 files (with the proper DSP code).

    If you're streaming from a USB interface, it should be much easier.  You might be able to use one of the PCM290x series to convert directly to analog from a USB interface (maybe PCM2900B).  The TAS1020B will convert to I2S from a USB interface.

    Brandon