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Getting the bpm from a playing NSMovie?



Hi almighty list,

is there a way to access the sound information in realtime from a
playing NSMovie? I need to do a bpm calculation (roughly) and I
don't have the original data (could be streaming).

So basically:

1) how can I get the sound data in short intervals?

2) any pointers for a simple bpm analysis?

Anyone?
Andreas Pardeike

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