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Index › Programming Questions & Help › Sound,  Music Libraries › How to write a Visualizer to sync to an Audio file
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How to write a Visualizer to sync to an Audio file (Read 2015 times)
ZapZap
How to write a Visualizer to sync to an Audio file
Jun 13th, 2009, 12:01pm  
Hi,

I am completely new to Processing, but have some what of a programming and music background. I am very interested in finding out how to sync different graphics and visuals to an audio (.mp3 or .wav) playing similiar to what the iTunes visualizer does. My first question is how can Processing be used to create something like this? Also, how can a processing sketch be syncronized to different audio files playing at different tempos? Does the processing script need to analyze the audio file ahead of time to detect repetitions to determine the beats per minute or something similiar? If anyone can help share some example code to do this that would be greatly appreciated.

Thanks
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koogy
Re: How to write a Visualizer to sync to an Audio file
Reply #1 - Jun 14th, 2009, 4:03am  
see the minim examples in the library

it lets you get at both the waveform values and the frequencies that make up the sound and you can assign these values to objects in your visualisation.

yes, it can do it in realtime but in practice there's generally some lag.
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Mat87
Re: How to write a Visualizer to sync to an Audio file
Reply #2 - Oct 19th, 2009, 12:30am  
I am interested in this as well...would be great to hear more about how this can be done.
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koogy
Re: How to write a Visualizer to sync to an Audio file
Reply #3 - Oct 19th, 2009, 5:02am  
see the minim examples in the library

it lets you get at both the waveform values and the frequencies that make up the sound and you can assign these values to objects in your visualisation.

yes, it can do it in realtime but in practice there's generally some lag.
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