Hi Ronnie,

you would need a Mid/Side recorded audio file, I'm sure the trick doesn't work with normal stereo. But no I don't have a patch. Normal M/S uses M and S instead of L and R. The S track gets panned left, and then an identical version gets panned right and inverted in phase, in Pd this would be [*~ -1]. Then use a samplewise delay on the M track, which is panned center (i.e. [*~ 0.5] sent to both left and right after the [z~]). To a point, the longer the delay in samples, the "higher" the Mid track seems elevated.

There could be plugins to convert normal stereo to M/S. I recall seeing such a thing in my Ardour plugins, so it probably came form one LADSPA lib.

Best! Derek

On 12/2/10 3:38 AM, ronni montoya wrote:

Hi Derek this sounds very interesting, is there an example patch of this trick to share?

thanks

2010/12/1 Derek Holzerderek@umatic.nl:

...

I've created the psychoacoustic effect of azimuth with Mid-Side recordings on stereo speakers before. Use traditional M/S panning: Mid = Center, L = + Side, Right = - Side, and add a samplewise delay to the Mid channel to "elevate" it in the sound field. I've never seen this trick discussed, but then again I'm not reading a lot of academic literature either.

D.

On 12/1/10 10:34 AM, ronni montoya wrote:

...

Hello, i was wondering if its possible to perceive azimuth with 2 speakers? Ive tried earplug but it just work with headphones, is it possible to create azimuth with speakers? If yes is there any library or object for this in pd?

-- ::: derek holzer ::: http://macumbista.net ::: ---Oblique Strategy # 24: "Bridges -build -burn"

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