4 ms·
It's not clear from the article, but I think what they are doing is delaying part of the frequency range of a signal. All this talk of negative delays is really
by cesaref 5y ago
It's not clear from the article, but I think what they are doing is delaying part of the frequency range of a signal. All this talk of negative delays is really confusing, it's just that they are delaying frequencies outside the range they are considering by a larger amount than within their range of interest. The overall effect is the same, there is going to have to be latency through the system.
So, I presume, their listeners are hearing a timbral shift caused by the harmonics being advanced/retarded. This is not the same effect as feeding a delayed signal into one ear and a non-delayed into the other (the relative phase being used for locating a sound).
They are I guess exploring how accurately they need to reproduce an impulse response to make an accurate transducer, and from the article, I believe they have concluded that they need to be more accurate than they previously thought. Given Genelec make a range of speakers with DSP for this sort of thing, it's I guess partly a marketing campaign to convince people that there is some benefit from their DSP corrected monitors.
Of course, for a producer to have an accurate monitor is useful, but if the listening public have non-aligned drivers, the sonic benefits from worrying about this stuff are of somewhat limited value.
- Ballas 5y agoYes, the way they describe it with "time traveling" is especially confusing. I still don't understand exactly what their claim is or what they intend on selling.
- xen2xen1 5y agoTakes me a minute to remember monitors and speakers can be the same exact thing, and not a monitor with speakers built in (like a TV).
- dr_dshiv 5y agoRight, it seems people can detect the .5ms phase difference in the timbre. It is a noticeable difference, but they aren't detecting the delay, per se.
- TrackerFF 5y agoI believe that the BBE Sonic Maximizer (http://www.bbesound.com/products/sonic-maximizers/default.aspx http://www.bbesound.com/products/sonic-maximizers/default.as...) products fix that. They (time) align the components in the frequency spectrum, for lack of a better description. edit: Or rather, it works as a dynamic EQ to dampen/amplify certain frequencies. Most guitarists that have a rack-setup, probably have or have tried these - in practice, the effect is just a more smoothed sound.
- nitrogen 5y agoThe claim of novelty for time-travel filtering seems odd, so I wonder if this was a mistake in transcribing the quotation for the article. Any FIR filter can effectively time travel if you consider the peak to be time zero. Negative delay of one part of the sound is positive delay of the rest. It's not new to this article, but this is something that is new with DSP that is not so easy without DSP. The DRC room correction software could achieve excellent results with frequency-dependent temporal correction back in the early/mid 2000s: http://drc-fir.sourceforge.net/ http://drc-fir.sourceforge.net/
- omegalulw 5y agoYou comment is sensible but what's a practical use case when you mix any two natural sounds with a delay and not get harmonics? So even if the ears are detecting the delay via harmonics I don't see why that's a negative thing.