Audio Equalizer

Question

Hi,
I'd like to do an app where I load a music (let's say a .mp3 ) , and I would want to be able to change the bass/middle/treble of the music during the play (in a XAML UI).  I looked around the different API's but I didn't find one that could work.

Is it possible to do some app like this on Windows 8 and/or Windows Phone 8 ?

Does it involves using XAudio2 ?

Thanks for your replies.

Vincent.

Answer 1

You can do this on Windows 8 and Windows Phone 8 using XAudio2. However there aren't API's available to do most of it, so would have to code it. In your example, using an mp3 file you would:

- Decode the mp3 file into raw PCM data

- Pass the raw audio data though filters for your equalizer. In this case it would be a 3-band equalizer. Here is one example online: 

http://www.musicdsp.org/showArchiveComment.php?ArchiveID=236

- Feed the processed pcm audio data into an XAudio2 SourceVoice for playback

Answer 2

That's what I thought.

Thank you for the code example.

Vincent.