Re: [ecasound] stereo to surround converter

On Thu, October 25, 2012 8:31 am, Julien Claassen wrote:
> Hi Patrick!
> It might be fun. But, seeing, that you have already looked into this:
> do you
> know, the difference between 5.0 and 5.1 I've seen, that you applied some
> filtering also for other channels,than the subwoofer. What's the standard
> in
> filtering. If I know that, I can write it.

This is the algorithm to convert a true stereo track to "fake" 5.1 surround :

channel 1 - Left Front : left input
channel 2:- Right Front right input
channel 3 - Center : left + right + (bandpass 200hz-16000hz) + (amplify 71%)
channel 4 - LFE : left + right + (low pass 200hz) + (amplify 71%)
channel 5- Left Rear: inverse left + right + (amplify 50%) + 20ms delay
channel 6 - Right Rear: inverse channel 5

--
Patrick Shirkey
Boost Hardware Ltd
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