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Old 07-01-2008, 12:47 PM
knightspider00000 knightspider00000 is offline
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Post Help with audio format conversion
Howdy!

I've been assigned a project (for the course I'm attending) to create a program that compresses wav files to mp3. I have no background in digital signal processing (or the inner workings of audio formats for that matter), and don't have much of an idea where to start.

I've looked up the very basics of the wav format but any attempt to find more about audio compression hits me with terms like 'psychoacoustics' and 'modified discrete cosine transform'.

Could someone suggest how to go about this? Will it require learning much about Digital Sig. Processing? If so, could you suggest a source that describes what I need to know without going into too much detail?

I'll be using C/C++.

Thanks.
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Old 07-01-2008, 10:09 PM
dargueta dargueta is offline
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Default Re: Help with audio format conversion
MP3 Format Information (scroll down a bit)
WAV Format Information (near bottom)

There's C source code for decoding MP3 files in the first link, near the middle.
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Old 07-02-2008, 12:58 PM
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Default Re: Help with audio format conversion
Look up LAME. It's open-source and encodes to MP3.
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Old 07-02-2008, 01:28 PM
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Default Re: Help with audio format conversion
Of course, the user needs the LAME library to be installed as well - but it probably is if the user has something like Audacity installed, which needs the LAME library to export to MP3s.
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Old 07-03-2008, 11:10 AM
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Default Re: Help with audio format conversion
LAME is open-source, so he could look at how the encoding was performed.
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Old 07-04-2008, 02:34 AM
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Default Re: Help with audio format conversion
Hi ,
This is very ineresting project.
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Old 07-05-2008, 12:25 PM
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Default Re: Help with audio format conversion
Yes, it is - and welcome to CodeCall!

Did KnightSpider00000 manage it?
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audio compression, audio files, compression algorithm, mp3, wav

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