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Audio Programming
http://forums.realsoftware.com/viewtopic.php?f=4&t=31788
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Author:  shaggymac [ Fri Jan 01, 2010 12:29 am ]
Post subject:  Audio Programming

Hello

my question is a mix between General and Game. I've searched for similar solutions and found references to Game Audio Programming.

Basically I want to take an audio clip and then morph the voice to something else.

Like the voice of Jigsaw. The person speaks then it adds some effects and you get a different sounding voice.

If someone could point me in the right direction on how to modify audio (maybe send the data wave thru a sin function to amplify or do other mathematical fun things to it).

Thanks for your help.

Author:  Ford Prefect [ Tue Jan 05, 2010 5:55 pm ]
Post subject:  Re: Audio Programming

If you're programming for Mac, you can make use of the Audio Units in Apple's CoreAudio. You have to wrap the API to REALbasic of course, which will probably be a pain to do:

http://developer.apple.com/mac/library/ ... ction.html

Then there's LADSPA, a library originally designed for Linux, but afaik works on Windows and Mac as well:

http://www.ladspa.org/

Again, you need to wrap the library to REALbasic, but this one might be easier as it's a simple C-Library instead of ObjectiveC.

I should state that I never worked with any of those APIs and I don't know how much effort it would be to use them in RB.


If you want to do it all by yourself, two suggestions:
1.) Don't. There IS software available for this, and it is certainly better and faster than something you develop in RB.
2.) Don't do it with RB. It's low level stuff, and RB isn't the language to implement such things.

Author:  shaggymac [ Wed Jan 06, 2010 8:50 am ]
Post subject:  Re: Audio Programming

I feared that this wasn't going to be easy. I don't want to start wrapping libraries with RB Code.

So my next question is does any one know of any Mac/Windows app that would let me input an Audio Clip and maybe a parameter to modify the waveform by sin(30).

Author:  elChupete [ Wed Jan 06, 2010 3:55 pm ]
Post subject:  Re: Audio Programming

Do you wan't those effecs where someone talks / sings and the words are "wrapped" around a synth line (dont know how to describe it better) then you might google for "vocalizer"

Author:  shaggymac [ Thu Jan 07, 2010 10:09 am ]
Post subject:  Re: Audio Programming

Yea. Ultimately, I want to change the pitch of the voice.

Author:  serd83 [ Tue Jan 12, 2010 9:13 am ]
Post subject:  Re: Audio Programming

You can do that and a lot more with FMOD.
Note that this classes will not updated in the future, you can read this at this site:
http://developer.chaoticbox.com/

You need the FMOD installer, to run the classes.
FMOD is free for non-comercial use. For comercial use and more information:
http://www.fmod.org

BTW, It will be great if Christian(MBS) add a pitch function to the audio-plugin. :wink:

Author:  shaggymac [ Wed Jan 13, 2010 10:03 am ]
Post subject:  Re: Audio Programming

Thank You! I'll check it out!

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