However, DRC technology has matured significantly over the past decade, so technical issues like pre-ringing and other shortcomings from the presentation have all since been addressed. You are in full control over every design aspect. One aspect of DRC that may not be so obvious is that we are adjusting the amplitude of the frequency response over time. And usually, just the low-frequency response as some room reflections above the transition frequency is a good thing.
There is an important distinction between regular eq like parametric eq PEQ and other forms of eq that do not adjust frequency response over time as compared to "purpose-built" Digital Room Correction software products. Regular PEQ is adjusting the frequency response which includes both the direct sound, early reflections, and later reflections all lumped together as one. The listening results are typically not good and are one of the reasons why audiophiles shun eq as the wrong tool has been used for the job.
Bass frequencies can "build up" in a room over time, so we need to reduce the amplitude of those frequencies over time.
Bass frequencies can also produce a maximum phase peak that is louder than the direct sound at a point in time past the direct sound. Again, commercial DRC software products are specifically designed to deal with these low-frequency timing issues. By then the sound has decayed to inaudible levels. Remember we are dealing with standing waves and room resonances where some bass frequencies decay faster over time than neighboring bass frequencies.
As mentioned, some bass frequencies may build up over time. And some bass frequencies are so resonant they seem to "resonate" indefinitely like blowing air across a Coke bottle. While acoustic treatments can assist, the reality is unless one "stuffs the room" with bass traps, there is not much absorption below Hz due to the wavelengths we are dealing with.
Aside from the major cost, and potentially aesthetic issues, bass traps are also "passive" devices and cannot discriminate between frequencies that need to be absorbed versus ones that don't need absorption.
It is blind to this and therefore the usual consequence is over-absorption in the lower bass and mids, which can take the warmth away from the music. I am not against acoustical treatments, but again, we need the right tool for the right job.
It is further complicated by the fact that not all room correction software products are equal. In my testing of several DRC software products over the last decade, there are only three commercial Digital Room Correction software products on the market that address both the minimum phase and excess phase response in the correct manner. These are Acourate , Audiolense , and Dirac. As such, they leave out important room correction functions that reduce the effectiveness of these approaches.
To be clear, REW and rePhase are excellent software that I highly recommend for their intended purposes. This is because the magnitude correction amplitude and phase can be independently applied from the included excess phase timing correction. The FIR correction filter requires a convolution engine like found in popular music player software like JRiver and Roon.
The room is in control of the low-frequency response regardless of which speakers you own. Hopefully through the "critical listening and what to listen for section," your ears have tuned into the bass response variations in your listening room. Purpose-built DRC software can mitigate these standing waves, room resonances, and modes both in the frequency and time domain by applying both magnitude and excess phase correction independently. We know what an ideal speaker should measure like, and when you apply DRC to remove the room's frequency response and time-domain distortion, one is rewarded with solid, even bass response that sounds tight and crystal clear.
It is a real treat to hear for the first-time accurate bass response reproduction in one's home listening environment. This is a real benefit to audiophiles.
One should think of DRC as removing the room's low-frequency distortion and restoring the loudspeakers' low-frequency response arriving at one's ears undisturbed. While this article focused on restoring accurate bass response in one's room, DRC products can also be used for digital crossovers of any type or slope, time aligning drivers, linearizing individual drivers, in addition to being applied to multichannel sound reproduction systems.
Remember to enable DSP and Convolution check the signal path when playing something to make sure. If the EQ or filters boosted some frequency which is likely , you might need to use Headroom management in Roon to prevent clipping, or turn on volume leveling in the zone settings. Here are some optional steps to consider doing, but they are a little more advanced and not as automated as the previous steps.
If you have questions about the following steps, be sure to join the discussion about this guide on the Roon forums. Then perform steps 5 — 7 and 9 — 12 and add the filters manually in Roon PEQ. This step is what I did to get the last picture of the measurements below. Take some care when doing this though, partly to save your speakers and partly to avoid boosting a destructive node.
So once done, do some critical listening to make sure everything sounds good. Se picture below for an example of extending the bass that worked well for me and my speakers:.
Sadly there is no free automated or easy ways to do this, but one good use of REW is to inspect where in the frequency range there is problems in your room. Do a regular sweep in REW from where your head is, and generate a waterfall or spectrogram to see where you have problems, and then if needed improve your room acoustics or take some other actions. Various impulse analysis can also help. Check this link for help about REW.
The default values seem to produce good results though. It may not display this or other websites correctly. You should upgrade or use an alternative browser.
Thread starter minidsp Start date am. Best Wishes for from the miniDSP team! Hoping you all had a great new year's eve wherever you are! What a better way to start the new year than bringing up to our community a new platform? Here is a project we've been working on for the past few months Following few weeks of testing with our partners, it's now ready for your eyes.. Check out the product page here! Stay tuned for further info, DevTeam.
Last edited: am. More options. I have yet to buy Xmas gift Late Christmas gift is indeed a good idea. You get it when all the sales are on! We have to wait a year!?! Sorry, I am still not used to "", haha. Hi, I was a bit surprised to see that this box only offers stereo output. Yet the word "crossover" is mentioned several times on the product page. Working on it :. One immediate fix is to jus use the brutefir convolution approach.
TODO: also offer option for multichannel analog interfaces. Thanks to all the great guys doing amazing SW stuff in the web! This tool is just trying to put it together in an easy usable way. Skip to content. Star Branches Tags. Could not load branches. Could not load tags. Latest commit. Git stats commits. Failed to load latest commit information.
0コメント