On the subject of possible new DSP features, I was wondering about the following: a kind of “smart” loudness control, that would vary depending on (Roon-controlled) volume.
@Magnus , old thread, I know…
Dynaudio definitely knows how to deal with speaker/driver phase. Just look at the XD series (digital active) When it comes to passive designs Dynaudio have the same problem as any other speaker manufacturer: a flat baffle is bound to give different arrival times for dome tweeter and midrange ref.: bass drivers. With steep filter slopes phase in cross over regions must also be considered.
Only way to fix this and keep the flat baffle is to use DSP.
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So will this be adressed by Roon?
Audeze has done it for their head phones. Loudspeaker manufacturers can easily do the same. @Cheung_Hon_Wah touches the subject earlier in the thread. That would be nice wouldn’t it! Lots of good speakers that is time coincident via a filter in Roons DSP!
Actually this has been done before. Celestion made a digital correction box for their 600si in 1991/92. Much easier today with player software that has built in convolution.
https://www.stereophile.com/content/celestion-sl600si-loudspeaker-dlp600-digital-equalizer-1992-measurements
Just use DIRAC and fix your room at the same time.
If/when DIRAC gets an integral part of Roon that is of course an excellent solution. If manufacturers start to supply impulse response filters I would guess many users that do not already use RC would benefit the most. If the speakers are already positioned to give good sound, a timing correction would just enhance that. Adding DIRAC correction on top of the manufacturer correction would then just take care of the speaker/room errors. No harm with extra correction.
In the mean time I’ll continue to use Audiolense filters that take care of both speakers and room.
Just ordered an UMIK-1 going to embark on Room EQ might just take measurements and send to Home Audio Fidelity. REW looks complicated.
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Did you order with a proper calibration?
Not that I am aware off. I just though you download the calibration file from their site after giving the serial number.
I see. Unfortunately that calibration file is not quite exact. This is better: http://cross-spectrum.com/measurement/calibrated_umik.html
If you can not cancel your current order and buy from Cross Spectrum instead, maybe you can approach Cross Spectrum and ask if you can ship the mic to them for calibration?
Im not faffing aboutchanging it, I’ll use it as its designed by the manufacturer I’m sure it will be fine.Thanks.
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Thanks for the guide. I plan to follow it this weekend.
Just a small comment on phase. My gut feeling is that it should help. Get a piece of music with a simple instrument in the middle of the stage, play it, listen, and then go to one of the speakers and then flip the phase by swapping the +/-. You will find that suddenly a perfect focused image is now completely smeared. Now I understand that the room reflection also messes with it, but that doesn’t means we cannot try to perfect the input (into the room) to get closer to phase correct.
You’d have to swap +/- on both speakers to flip absolute phase. What you describe is channels out of phase which makes no sense. I’ve never heard a setup where room reflections produce anything like out-of-phase channels - if that is what you mean.
Hey,
I have read quiet a lot about room correction recently, especially, becasue i was interessted in the Lyngdorf TDAI-3400 which has built in RC called ROOMPERFECT.
Is there anyone with experience comparing ROOMPERFECT against DIRAC or REW?
i think i will give DIRAC and REW a try first.
regards
Andy
REW is not actually room correction compared to Dirac and the others (Accourate, Audiolense…) as REW only produces amplitude correction. The others do time domain correction too. Full range. Whether you need correction in the time domain depends a lot on your speakers and their position in the room. I also believe Roomperfect does some time/phase correction, but the last time I tried (long time ago) it only corrected bass and lower mids.
I would suggest buy an UMIK-1 and try REW first, its cheap (around $100) and the mic is usable if you decide to use more advanced room corrections like Dirac in the future, or want to do measurements and send to Thierry (https://www.homeaudiofidelity.com/)
And while, in some cases, time/phase corrections can give a little extra, its very limited what you actually can correct for time/phase in a typical stereo setup. In most cases, the biggest benefit of digital room corrections is correction of frequency response in 20 - 200 Hz.
Feel free to have a look at my guide as a start: A guide how to do room correction and use it in Roon
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The UMIK-1 is good advice. I forgot to mention HAF which has gotten a very nice reputation lately. Is it correct that one uses the UMIK with REW to generate the measurements Thierry needs for calculations?
EDIT: I’d suggest getting a calibrated mic form for example Cross-Spectrum Labs http://cross-spectrum.com/measurement/calibrated_umik.html
EDIT2: Seems I am repeating myself… I posted the same link a few posts up, but that was back in August last year!
Amir has tested the electronics and RC in the Lyngdorf in a two-part review.
That is correct, check his website for more info.
A huge help for me was purchasing an inexpensive microphone stand along side my UMIK-1. Yes I use HAF and love it!