Bonjour! Le 13 mars 2011, Fons Adriaensen a écrit : > On Sat, Mar 12, 2011 at 10:31:25PM -0500, Marc Lavallée wrote: > > Binaural recordings should normally be heard with headphones, not with > > loudspeakers. Cross-talk cancellation works with loudspeakers, with any > > stereo recording. > > What cross-talk (XTC) cancellation tries to do (by definition) is to > deliver the L and R signals to their respective ears and not the the > other one. Which is what headphones do. So binaural should work well > with XTC. It does within some limits, and it's more or less the only > recording method that does.
I don't know if binaural works "well" with XTC; everytime I tried there was no 360 degrees soundstage, like binaural is supposed to provide when listening with heaphones. It was just like stereo, not better not worst. I never had a good listening experience with binaural; maybe it would work with my own recordings made with in-ear binaural microphones? > You get some 'spatial' effect with almost any stereo recording, but > if that corresponds to the actual positions of the sources is another > matter. In most cases it's just an effect, and it has nothing to do > with realistic reproduction. Correct. But for a "less unrealistic" reproduction, mastered for XTC, sound engineers can use XTC. XTC does steer the stereo image, but despite that "problem", listening to conventional stereo recordings with XTC is more enjoyable; I much prefer its 120 degrees image. The other benefit of XTC is easier localisation and a better definition of the sound events in the stereo image; it's like listening with headphones, but with a frontal sound stage instead of an "intra-brain" one. > Regarding the 'single head' rule: XTC effectively removes the effect > of the listener's head, by trying to deliver the L and R signals to > their respective ears. The only 'head' effect that remains is some > coloration depending on the secondary source (speaker) direction > relative to the listener's head. And that, XTC gets completely wrong. > Imagine a source at e.g. 45 degrees left. If the listener faces the > XTC speakers he gets the coloration for a front source. If he turns > his head left towards the apparent source, he gets the coloration for > a 45 degrees *right* source (because that is where the speakers are > in that case). > > Ciao, True. That's why XTC with a closely spaced stereo dipole is usually more tolerent to head movements, can provide better centered mono, and suffers less from colouration. I agree that XTC is a bad choice for large public installations; it is a personal listening technology, like conventional stereo. I yet have to listen to full periphonic ambiosonics. I had a good demo 2 weeks ago (thanks to Daniel Courville) with 6 speakers in the horizontal plane (and the Harpex-B plugin). I would also like to experience a good ambiophonics demo. There's something to be learned from all reproduction techniques, and I doubt that there will be a perfect one; I'm amazed by the energy and passion of researchers. -- Marc _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
