David's new crosstalk cancelling impulse response filter is a valuable addition to the large library of crosstalk cancelling gizmos now available. I just used it with Waves IR-L (under AudioMulch) for the front speakers and RACE (via TacT) for the rears, playing just ordinary stereo CDs, and I think this is the best four speaker wide stage and presence effect I have heard yet. There must be some psychoacoustic advantage to using two completely different algorithms front and rear as compared to just using two different settings for RACE. There is also the difference in latency between the two processes and that may be a part of the reason. Maybe some kind of averaging effect. But the imaging at the 90 degree sides was exemplary and full bodied and mono front and center. RACE operates over the full bandwidth although it does nothing useful XTC-wise in the very low bass or the very high treble. David's operates only between 200 and 1000 Hz so perhaps the combination is beneficial. For just plain frontal stereo with two speakers it is a trouble free delight with a non-critical sweet area at least with my speakers so far. If you lose DW's message, his links and description will be available on the Ambio website shortly. Thanks to help from around the world, one can have the following versions of Ambio-like crosstalk cancellation (i.e. no HRTF's used, fully recursive, smaller speaker angle, 4.0 capability etc.) Hardware Components (no PC required) Transcoders for Java VST plugins Raw Impulse Responses for convolvers Apps for the iPad Mechanical barriers More coming I hope. We still need a 3D program for steering concert hall ambience derived from Hall IRs to an arbitrary number of ambience surround speakers. But I have to say that almost all Ambio users are only into movies, games, and video so a Domestic Concert Hall is not on many lists. Probably 3D sound (via four speakers i.e. two Ambiodipoles) for 3D video may be the ultimate most popular use. Ralph Glasgal www.ambiophonics.org
From: dw <[email protected]> To: Surround Sound discussion group <[email protected]> Sent: Sunday, May 29, 2011 11:13 AM Subject: [Sursound] New filter Free Ambiophonic "stereo-dipole" type crosstalk cancelling filter. For 3 sample delay @ 44100. Speaker angle ~ ± 7.5 degrees. Tested with Jawbone Jambox @ ~40 cm. distance. http://www.wareing77.plus.com/Filters/ Sorry for the repost, but my computer thought it was Febuary the last time.. David Wareing. _______________________________________________ Sursound mailing list [email protected] https://mail.music.vt.edu/mailman/listinfo/sursound -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20110530/b0293c9a/attachment.html> _______________________________________________ Sursound mailing list [email protected] https://mail.music.vt.edu/mailman/listinfo/sursound
