Recent content by j_j

Not quite. It's the dispersion of the driver that renders those frequencies, so it does not have to be bad at all.

If it's constant beamwidth across frequency, are you SURE it's a bad thing?

The answer is "yes" but width of transducers gets interesting. There are a few ways to go about it.

As to locating the locations of speakers, there's a paper in the AES convention record by "Johnston and Fezjo" (not sure which order), maybe with some other authors, too. It's been a while, but it is possible to capture such information and get proper timings pretty easily. Even the tiny room...

Uh, yeah, you left out some stuff, like what crossover you have and how it works. Also if you reversed the phase, did you also invert the driver response so as to flatten it, rather than simply flop the phase. If so you may have actually emphasized the frequency response errors. Without a...

I should add, for crossovers, one wants an "even order" filter, which means an odd number of taps. This provides an integer sample delay for the filter. This has very handy-dandy consequences. :)

There are approximations in Rabiner and Gold. Because the issue of where zeros land as you change length, somewhat annoyingly, no, there is not really good approximation. All of edge of pass band, edge of stop band, inband ripple, and stop band ripple are included in the problem. This is when...

Link fixed. https://www.audiosciencereview.com/forum/index.php?threads/step-response-does-it-really-matter.1999/page-22#post-1604068 That's for a minimum phase, "linear" phase, and maximum phase set of filters with identical magnitude response. This might help understanding the minimum...

That was a lot of (justifiable) questions. I'm trimming out the "is it audible" with the comment "sometimes". (more so inter aural than intra-aural, but both can matter substantially). The "why FIR" is simple, though. All FIR's are stable and can be created using reasonable processes. You...

Actually, a linear, non-minimum phase system CAN be corrected with LONG filters and a lot of work, but the correction is never perfect. It can, however, be very, very CLOSE to perfect. A pure delay system (i.e. linear phase) has no phase issues to be corrected. No, it means that all poles and...

To the MOON, Alice!

HAR. That's quite a good trick!

It's special. Very special. Isn't it, now? "fluctuations in Earth's magnetic fields". Yeeaahhhhhh. Next they'll want a CME to hit earth to fully "condition" it, perchance? (please, do not mistake my reply for anything but sarcasm)

(sarcasm mode) You want grounding? THIS is grounding. https://www.lessloss.com/blackbody-p-200.html (exit sarcasm mode)

It's also possible that there is some out-of-phase signal in the bass. While you can't localize that, it does at least between 40 and 90 Hz create a sense of width. Mono bass can not do that.