Why treat modal resonances BELOW the speaker CUTOFF? (eg @40Hz)?
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- Опубликовано: 3 окт 2024
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Treating the bass in your studio is hard.
Especially the lowest octave.
To fully absorb 100Hz you theoretically already need 86cm (2’10”) of porous material depth (¼ wavelength rule).
Of course this is deep in voodoo territory, because what is technically true isn't even remotely necessary in practice.
I can assure you: If you were to cover your entire room in 86cm deep absorptive material, it would absorb FAR further down than 100Hz..
Still, how far down in frequency does it actually make sense to go in practice?
Is there even a point in absorbing lower down than the natural cutoff of your speakers, for example (@40Hz typically)?
What's a good target to set for your low end absorption?
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If you're able to treat the low fundamentals the harmonics will also benefit
Can you make a video about ,,Active,, Basstraps / Room Mode Compensation like an Array / Bass Array Solution (Double Bass Array, Single Bass Array). I think many people dont know this and the benefits of it
Voted for this subject numerous times already. Though, active traps are yet a part of the hi-end budget.
Array Solution are just a lot of Planning and Prpgramming. Thats the downside. You need to put work into REW, Measurements etc. But when you set it up properly, you can get an nearly flat Lowend without massive amounts of Absorption arround it.
Building 4x ,,High End,, Subwoofers with good drivers from scan speak costs under 2000euro. So the end costs are way under ~5k - and you get the best possible lowend. The passionated Homcinema Guys are doing this since years to get the best Lowend in small rooms
Many thanks from south korea. Ur video helped me a lot. Just wondering your opinion about polyester material acoustic panel(absorber) compare to traditional material like rock wool, glass wool, etc. It's going to be 8inch (20cm) thick and 40k dense. The length and height are going to be 1m and 2m.
You can feel a bit less guilty about not achieving full effectiveness below 40 Hz by considering that very low bass is generally not transient in nature. This means that long decay times associated with modal resonance are far less of an issue than they are in the midbass. I think it’s sufficient to smooth the frequency response of the lowest octave with EQ, as long as you don’t rely on using too much boost.
Thank you for excellent content, as always 🙏 I have followed your advice and have finally got a pretty good environment for mixing music - except that I still have a huge resonant peak @ 27 Hz (maybe about 10-12 dB). I wonder if the right way to address this would be to build a Helmholtz resonator. What is your thought on that?
I would also add that the smaller the room, the higher the fundamental resonance of the room itself. So, possibly, you don't even have resonances that low in the frequency spectrum.
Both of my rooms have fundamental modes in the mid 20s... rather difficult to manage... unfortunately the lowest 2 octaves have so much influence on everything above it...
I have a Genelec 7360A 10 inch that goes all the way down to 19 Hz. I have 4" panels on the walls and triangular bass traps in the corners from GIK.
The 4 inch panels won’t do much under 200Hz
I'm fairly confident those bass traps from gik don't even go that low, and even if they did I bet my money they don't get enough of that low frequency energy
@@djhmax09 none of the traps do, don't they?
@@zerobject nope, not enough horsepower
What about digital room correction. Is it a decent substitute for lowest end peak correction?
If you can effectively control all other aspects digitally, then, obviously, it would work as well.
Related question, does it make sense to cut off my speaker at 40 Hz if I have a massive mode below that, which will be difficult to treat?
no, just sit in acoustic balanced position in your room
. 40Hz cutoff. That depends on the music you listen to. Music recorded in analog by microphones of humans playing physical instruments, for example, is a case where not much will be missed. There are very few instruments that play that low or microphones that record real low. Often times too, recording engineers compress low notes UP so that every day systems can resolve them. (edit) Which is the case recording live Reggae due to the Open B 5th string at 32Hz of the bass guitarist.
Synthetic music can be created & stored digitally at very low frequencies. Hip-Hop, Electronic Dance Music and the whole Low Frequency Effects of home theatre are all way down there.
Acid Jazz, Funk & Brass 🔈🔉🔊
Just EQ all excessive energy.
Children's Bean Bag Chairs..........................
Are now filled with memory foam chunks, sold in 2 foot diameter X 2 foot tall size and are covered in colorful microfiber fabric. They're about $35 each.
Stack 3 in the corner for a 6 foot tall bass trap that is dual use, easy to repurpose, easy to move and may just be a little more home decor friendly.
Acid Jazz, Funk & Brass 🔈🔉🔊
I think you're underestimating how much horsepower it takes to absorb low frequency energy...