I'm wondering if others have found that a very large percentage of audio tracks on Spotify exhibit excessive use of echo. I think maybe the tracks have been mixed to suit 'dead' box speakers, and using DML with such tracks makes it sound like a large cover hall.
Those with experience in this please enlighten me (Andre, Todd etc).
Short of downloading the tracks and running a filter on them I can't see a solution
Eucy
Those with experience in this please enlighten me (Andre, Todd etc).
Short of downloading the tracks and running a filter on them I can't see a solution
Eucy
Why isn't a thread with 12461 messages and still going very strong, made "sticky" at the top? Please enlighten.
(Wish there was a table of contents and search keyword list.)
(Wish there was a table of contents and search keyword list.)
Hi Eucy,
No. Not sweeps, but noise. The REW Generator has the option to generate special types of noise.
For the RTA function, I use the Pink Periodic noise, which plays a repetitive pink noise signal a certain number of bits in length.
The RTA window has the feature to lock into the Generator and synchronise its readings with the Generator's noise loops.
Depending on the bit length (loop length) you can do multiple wide bandwidth readings per second for lower bit lengths, or 2 or 3 seconds for a higher bit lengths. The longer the bit length the lower you can go in frequency.
I usually do a sweep to confirm after I'm happy with the RTA.
I've never used Spotify but can only assume that (bedroom-studio?) producers who do not have the appropriate training or experience in mixing and mastering will fall prey to this very basic problem: that of the over-use of effects.
There's nothing you can do about it. A filter cannot get rid of the problem. And yes, a DML speaker will indeed reveal such an error.
Hello Eucy,
Back from a summer break...
I think I have used a similar techniques. For this procedure, the exciter is not yet glued on the membrane. Play a pink noise with REW (a periodic one according to your RTA window length). Put the mic in front of the panel (ie 1m in front). Find a location for the computer so that you can see the RTA from behind the panel. For the RTA some short average (ie 4 or 8) is ok. Being on the rear side of the panel, take the exciter in your hand, put it in contact with the membrane and then move to find the "best" position.
This procedure suppose you have already a suspension of the panel strong enough to allow an efficient enough the contact of the exciter. Maybe with 3 hands, it is possible to do it before gluing some suspension.
Far back in the post, this method was used by Veleric or Burntcoil (or other...I don't remember sorry) with an horizontal membrane just laying on some testing frame
When I tested it, I was in difficulty to say what is the smoothest FR... For each location, the FR was not really smooth. My problem was to choose the least worst position... it was maybe due to the not so good design of this panel?
Hope it will help you. Let us know if you test it.
@Andre Bellwood : is it what you do? is the panel with its "final" suspension?
Christian
Well, there is no end game here, it's a subjective thing, one person's "perfect" sounding panel may sound like crap to someone else, decent to another, and yes, maybe perfect to the next.
Monday's child is fair of face, Tuesday's child is full of grace, Wednesday's child is full of woe, Thursday's child has far to go, Friday's child is loving and giving, Saturday's child has to work for a living,....
A bit like that Todd??🤭
Like old soldiers..this thread will never die....
Old soldiers never die,
Never die, never die,
Old soldiers never die,
They simply fade away.
Must be poetry day...😁
Yes, that's more or less what I do Christian.
I've been using stretched canvas panels with Nidaplast inserts in the back which are a cm or so smaller than the canvas frame. I've been experimenting with different adhesives between the NP and the canvas. Once the adhesive is cured, then I use the same adhesive on the back of the panel where the drivers get mounted. This gives me a lightweight composite panel 5mm thick with varying stiffnesses depending on the adhesive used. So yes, I'm using the final suspension.
My workbench is such that I can hang the test panel from wires in the ceiling, and then prevent the frame from moving by placing a brick or a piece of wood screwed into the workbench, along the bottom edge. This allows me to put reasonable pressure onto the driver onto the panel.
But I found that, no matter what I do, I was picking up resonances and reflections off the nearest wall and workbench surface itself even with lots of acoustic damping all over the surfaces. So I've moved the test rig off the bench and into open space.
If I'm using four drivers, then I find that the best way of getting good driver positions is to target a specific peak or dip frequency, one at a time, and then adhere the driver into place with adhesive tape. This allows me to target the four worst issues. Once all four drivers are mounted,, and I'm not happy enough, then I start moving the most suspicious drivers around again. Eventually glue them all into place.
I also find that, once the drivers are glued into place, then the extreme HF often improves, so I don't worry too much about getting the HF aligned correctly on first attempt.
But having said that....
I might be tempted to find good positions on the raw panel before I mount it onto the canvas. But this testing will only be effective from say 200Hz upwards because of the way the frame improves the bass end once the NP is mounted into it.
Hi Andre,
With your canvas suspended panels what adhesive have you found successful? I had a quick experiment with contact adhesive to glue on 10mm Eps, I was impatient to test and didn't wait for it to cure fully so I think it didn't have as good high frequency as it could have. I ended up cutting away the canvas around where the exciter was mounted to increase the HF output, this helped.
I need to experiment more with this mounting method as it did have improved bass response.
With your canvas suspended panels what adhesive have you found successful? I had a quick experiment with contact adhesive to glue on 10mm Eps, I was impatient to test and didn't wait for it to cure fully so I think it didn't have as good high frequency as it could have. I ended up cutting away the canvas around where the exciter was mounted to increase the HF output, this helped.
I need to experiment more with this mounting method as it did have improved bass response.
I tried this a long time ago, but I could not get rid of floor reflections. I eventually had the microphone wrapped in blankets with just the capsule sticking out, and all mounted in a laundry basket 🤣 🤦♂️. I was still picking up floor reflections. And you cannot do anything about the ceiling reflections.
I use an adhesive that cures hard. Epoxy resin, FRK and undiluted PVA all work ok. I prefer the PVA because it does not cure as hard as resin, and so the panel becomes less resonant, and with more self-damping.
What kind of contact adhesive did you use on EPS that didn't eat it up??
Thanks I will try PVA another time. I used 3M 78 industrial polystyrene and insulation adhesive. It probably does cure hard but I was testing ten minutes after sticking!
look for water based contact cement 3M make it as do LePages (called Press Tite Green) the LePages will stivk to polyseter film or plate glass it is non toxic has a very long working time and won't let go. Hope this helps.
https://qualichem.ca/product/pres-tite-green-contact-cement/
Well the most succesfull mastering engineer i know is as deaf as a mole rat. Still they call him to do expensive jobs worldwide for 0.5dB differences in the bands that matter the most.
Sorry for the off topic mumbo jumbo.
Yep.... It's weird....I guess the brain compensates... Harmonics can be detected etc...I just need a yardstick while I get used to it...if that ever happens.
And hearing aids distort the frequency response so although they are of some value in general use, in qualitative terms they're a problem as well
Yes, sound perception is a mysterious thing. The theory of how the cochlea works seems to be a little bedtime story. We don't know the origin of tinnitus, and like 15% of people have acoustic hallucinations. McGurk effect. Many things like that.
Somedays after long working days, i heard awfull HUGE combing effects that weren't there when needing to calibrate to 94 dB in the lab.
It seems to be a surge in sudden hear loss, my brother in law (who plays in the national phillarmonic) woke up deaf from one ear, one day to the other. And apparently, its happening more and more. Sometimes it gets back if there was some sort of particular trauma, even after months.
Maybe sound is for us introspective people a way to connect with the world more accodingly to our soul, which makes us doubt about the facts that are presented to us.
In the end, there is always a yardstick in the way.
Hope your condition improves, else you learn to live with it for the better! I wish i was a bat 😉.
(i don't hear too well from one of my ears either but after sevveral years i just got used to it).
Somedays after long working days, i heard awfull HUGE combing effects that weren't there when needing to calibrate to 94 dB in the lab.
It seems to be a surge in sudden hear loss, my brother in law (who plays in the national phillarmonic) woke up deaf from one ear, one day to the other. And apparently, its happening more and more. Sometimes it gets back if there was some sort of particular trauma, even after months.
Maybe sound is for us introspective people a way to connect with the world more accodingly to our soul, which makes us doubt about the facts that are presented to us.
In the end, there is always a yardstick in the way.
Hope your condition improves, else you learn to live with it for the better! I wish i was a bat 😉.
(i don't hear too well from one of my ears either but after sevveral years i just got used to it).
Thanks vdljev
I've had tinnitus for forty or so years, but as my hearing otherwise deteriorates, it is getting louder...a known effect... Hearing aids help a bit because when outside sounds are magnified, the brain focuses more on them and less on the tinnitus noise.
BTW...Are you a rugby fan.?.. We have a match on 31 Aug at Estradiol Jorge Luis Hirsch
The Wallabies have been in sad form of late 😵💫😢