this is for the z506 speakers or, Michael, what was your set up when you used the X-140's?
On Mon, Oct 21, 2013 at 4:35 PM, Matthew Palmer <palme...@mymail.vcu.edu>wrote: > What is needed between the computer & the speakers like how do I get the > computer to acknowledge each speaker from say this set ( > http://static.clickbd.com/global/classified/item_img/512646_2_original.jpg/ > 3.5 > mm and six channel direct audio cables (RCA cable not included)) as an > individual channel? > > > On Mon, Oct 21, 2013 at 6:17 AM, Dave Malham <dave.mal...@york.ac.uk>wrote: > >> Actually, a square or rectangular decoder's outputs are such that if all >> four outputs are mixed together in equal amounts, the directional >> components (X and Y) will cancel out automatically leaving just the W - >> which is generally what would be sent to the sub... >> >> Dave >> >> >> On 21 October 2013 01:11, Marc Lavallée <m...@hacklava.net> wrote: >> >> > Matthew Palmer <palme...@mymail.vcu.edu> a écrit : >> > > I'm wondering if it (4 sets of Logitechs) can give me 3d >> > > gratification for a little over $200. I know I'm definitely >> > > sacrificing quality but it will take me ages to save up for a proper >> > > set-up. >> > > I don't understand what kind of amplifier would be needed though. >> > >> > Yes! 4 small speakers with one sub are enough as a starting point: >> > I suggest reading "Localization in Horizontal-Only Ambisonic Systems" : >> > http://www.ai.sri.com/ajh/ambisonics/BLaH1.pdf >> > >> > Use a square or rectangular configuration, and drive the sub with the W >> > ambisonic channel; you can use a multimedia 5.1 kit (with integrated >> > amplifiers), but the sub should be driven separately, not by a mix of >> > the 4 decoded speaker channels (that's my comprehension). >> > For un-amplified speakers, you can use cheap D-class amps. >> > >> > > I don't fully understand what cross-over frequency is (it sounds >> > > obvious though) but maybe by reducing the center channels from the >> > > set-up , I'd reduce the amount that is happening. >> > >> > I would not use the centre channel; there are experimental 5.1 decoders >> > but I never tried. The cross-over frequency is between the sub-woofer >> > and the satellites. Ambisonics works well at low frequencies in small >> > rooms, at least down to the Schroeder frequency (usually around 150Hz, >> > depending on your room size and acoustic treatment). That's why 300Hz >> > is a bit high, but it's not catastrophic. >> > >> > Ambisonics with height is possible with a "3D7.1" configuration (using >> > a 7.1 speaker kit). I yet have to try it. >> > >> > -- >> > Marc >> > >> > > On Sun, Oct 20, 2013 at 7:12 PM, Charlie Richmond >> > > <charlie....@gmail.com>wrote: >> > > >> > > > On Sun, Oct 20, 2013 at 3:59 PM, Marc Lavallée <m...@hacklava.net> >> > > > wrote: >> > > > >> > > > > >> > > > > What matters is rigidity; if a plastic enclosure is rigid >> > > > > enough (for its size), then it would sound the same than a hard >> > > > > wood enclosure. In the specific case of the Z506 model from >> > > > > Logitech, wooden enclosures for the satellites would make no >> > > > > difference; the drivers, the amps, and the enclosures are too >> > > > > small to shake. Only the sub-woofer enclosure is made of MDF, for >> > > > > a reason. >> > > > > >> > > > > So, why not using the Z506 5.1 kit from Logitech? "Multimedia" >> > > > > speakers are primarily designed as computer accessories; some are >> > > > > probably well made, excluding the one in the MoMA's permanent >> > > > > collection (unless aesthetic is the most important criteria). I >> > > > > wouldn't trust its sound quality; it's a bit small unless the >> > > > > listening distance is less than 2 meters, the centre speaker does >> > > > > not match the four other satellites, the centre speaker have 2 >> > > > > mids and the satellites have one mid and one tweeter, and the >> > > > > cross-over frequency for the sub-woofer is probably near 300Hz, >> > > > > which is a bit too high. For Ambisonics, I believe that better >> > > > > quality full-range or coaxial speakers, all matched, should be >> > > > > preferred. >> > > > > >> > > > > I would only such use small multimedia speakers for a very compact >> > > > > periphonic installation, along with 4 to 8 small sub-woofers for a >> > > > > supplemental horizontal or periphonic low frequency decoder. >> > > > > >> > > > >> > > > Agreed. That said, the Logitech self powered systems are generally >> > > > extremely well made and sound very good, imho. >> > > > >> > > > C-) >> > > > -------------- next part -------------- >> > > > An HTML attachment was scrubbed... >> > > > URL: < >> > > > >> > >> https://mail.music.vt.edu/mailman/private/sursound/attachments/20131020/73b9a2d1/attachment.html >> > > > > >> > > > _______________________________________________ >> > > > Sursound mailing list >> > > > Sursound@music.vt.edu >> > > > 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/20131020/2bfcc5f5/attachment.html >> > > >> > > _______________________________________________ Sursound mailing list >> > > Sursound@music.vt.edu >> > > https://mail.music.vt.edu/mailman/listinfo/sursound >> > > >> > >> > _______________________________________________ >> > Sursound mailing list >> > Sursound@music.vt.edu >> > https://mail.music.vt.edu/mailman/listinfo/sursound >> > >> >> >> >> -- >> -- >> As of 1st October 2012, I have retired from the University. >> >> These are my own views and may or may not be shared by the University >> >> Dave Malham >> Honorary Fellow, Department of Music >> The University of York >> York YO10 5DD >> UK >> >> 'Ambisonics - Component Imaging for Audio' >> -------------- next part -------------- >> An HTML attachment was scrubbed... >> URL: < >> https://mail.music.vt.edu/mailman/private/sursound/attachments/20131021/c9492ea9/attachment.html >> > >> _______________________________________________ >> Sursound mailing list >> Sursound@music.vt.edu >> https://mail.music.vt.edu/mailman/listinfo/sursound >> > > -------------- next part -------------- An HTML attachment was scrubbed... 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