Not clear that it's be a signal, since in general one modulates in order to convey information.
Audio Nerds
- Thread starter Westy
- Start date
True. You can have a binary state but the result of any state change would result in infinite frequencies over all of time.
Fun fact. A laser beam can only have a single wavelength of light only if it has been on from t=-∞ to t=∞. This is defined both by the fourier series and the uncertainty principle. If you know the exact frequency of a photon, you don't know when that photon was measured.
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The ultimate buzz on?
I just listened to the guy at the hifi store...he told me once that a particular subwoofer sounded ‘chocolatey’.
So clearly he was a scientist.
Humans can't really hear anything below 20Hz. I don't think i can hear anything below 25Hz. The kitchen, living room and dining room in my old house were all one open space with high vaulted ceilings,. I have a rediculously large subwoofer as a result. It can go down to 18Hz. I can't hear that, but it will rattle every door and window in the house. Might be a good way of tricking someone into thinking the place is haunted.
My vehicle subwoofer back then would play lots of stuff I couldn’t hear, but only feel. I would always look in the rear view mirror, it looked like you were in an earthquake. And the feeling of all of the hair on your neck vibrating was pretty cool. Another random album with some crazy bass was Tori Amos ‘Under The Pink’.
But mine goes to 11hz. I had it specially made.
That’s when you just turn up the volume, duh
Nothing like spending money to listen to car parts rattle.
Up to or down to?
I forgot that I used to post a lot on the Basshead forum...
Yeah
I remember this interesting concept of a rotary subwoofer (constant RPM to my knowledge) with variable pitch blades. It was supposed to perform well at sub-20Hz frequencies but didn't seem to gather much of a following. Low adoption rates were likely due to practicality as the installation was somewhat large and involved (IIRC it was built in the floor or used an attic for the required airspace).
Here is a DIY version with some of the inner workings exposed:
Here is a DIY version with some of the inner workings exposed:
I’ll take TWO.
Always wondered what I could have done with this driving a cone. Twin ironless linear motors with encoder feedback. This was a proof of concept, real deal was supposed to have air bearings for quiet operation.
lol. brings me back to my silly late teenage days. the ol' celica gt hatchback, lots of dynamat (no rattles!), 2 jl 12w6 subs in a box i built, two rockford fosgate amps and crossover, maybe jbl 6" speakers front and rear . . . can't remember which tweeters i had, and everything blasting out of there from hardcore to metal to rap. dj magic mike and the geto boys were some of the best for stupid amounts of bass. dave lombardo double-kickdrumming you in your back was also awesome. mirrors became useless, and apparently my electrical system could have also maybe used some help, because when the bass hit the lights would flicker.
I sold my shop in my late 30’s, and had time and a not new (but not old) f150 to play with. I tore everything out and dynamatted it, installed three batteries, and much stronger alternator. 0 or 4 gauge all around, three amps, custom subs. Focal speakers, Sundown amps.
it was completely, 100% retarded for a grown ass man to have in his truck. In general, I would rarely play it loud enough to be heard out of the truck. (Which was still loud with all of the sound damping).
But when I was way out in the middle of no-where...hoo boy.
I had 1/4 jacks that would cut out the vehicle speakers, and-run some separates on either side of camp.
it was fun to do, but I didn’t want to do any of that shit to my new truck when I got it, so I just have some self-powered under seat subs, and (CLUTCHPEARLS) stock speakers.
my wife was, shall we say, unimpressed, it was pretty white trash.
it was completely, 100% retarded for a grown ass man to have in his truck. In general, I would rarely play it loud enough to be heard out of the truck. (Which was still loud with all of the sound damping).
But when I was way out in the middle of no-where...hoo boy.
I had 1/4 jacks that would cut out the vehicle speakers, and-run some separates on either side of camp.
it was fun to do, but I didn’t want to do any of that shit to my new truck when I got it, so I just have some self-powered under seat subs, and (CLUTCHPEARLS) stock speakers.
my wife was, shall we say, unimpressed, it was pretty white trash.
Since I primarily listen to records or digital music these days I thought I would bust out the old CD player. I expected to things to sound the same as a good lossless source and better than something compressed. Never thought a CD player would make any difference. I haven't had this thing hooked up since I lived in Virginia. The first thing that struck me was that it did sound different, and it sounded like my house in Virginia. Back then I had it set up in a very large open room with vaulted ceilings, small bookshelf speakers, different amplifier and a large subwoofer. My current house is old, small and built with timbers and plaster. The sound of the old house was more or less the sound of the CD player. I never would have guessed that.
That being said the CD player had clearer highs but the low end feels dull. I always thought that was from small speakers in a big room.
That being said the CD player had clearer highs but the low end feels dull. I always thought that was from small speakers in a big room.
When I lived in Anchorage I had a buddy with a $300 Chevette. He had over $3K in stereo gear in that thing. Used to win boom car competitions all the time. I would tease him that the sonic vibrations of the system would drive the car faster than the motor. Totally stupid...he is a doctor of some sort now.
Nothing like spending money to listen to car parts rattle.
The hearing loss topic...
I always used the optical output on my CD players, that way it stayed digital instead of being converted back to analog. true DDD discs sounded pretty good. Then again, something about listening to vinyl through a tube amp, just kinda warms you up.
The overlap between sex toys and audio transducer design can be somewhat alarming. Might need a lube shield though.
I nicknamed it the violator for obvious reasons.
I nearly justified building an anechoic chamber for testing the sound signatures of the instruments that my company produces (which utilize pumps/blowers etc.) with the thought that it may lend itself to my audio curiosities. In the end we decided not to take it on.
Something like this, yes. Audiophiles have some interesting words to describe two channel audio effects. Soundstage being a term that is used frequently: "In the world of audiophiles, soundstage (or speaker image) is an imaginary three-dimensional space created by the high-fidelity reproduction of sound in a stereo speaker system; in other words, the soundstage allows the listener to hear the location of instruments when listening to a given piece of music".
To be able to decipher the positional information (side to side as well as depth) of individual instruments during the recording session is a pretty neat thing to hear. Especially if one is used to listening to music passively as more of a background noise.
Its hard to explain, but when I listen to a well recorded/produced song in my Jeep It typically sounds as if vocals are literally coming from a spot in the middle of my windshield (but it also sounds like the source is further away than the windshield itself). Then perhaps the guitar comes in to the right of vocalist and the saxophone to the left; drums are centered behind and piano to the far right. I have no center/dash speaker (or rear fill for that matter), the centered "image' is the result of time alignment and making the driver pair on each side have the same affective acoustic response (which may require applying differing electronic filters/slopes etc. to account for the odd geometry of vehicle).
The thing is, recordings vary quite a bit and it is impossible to "tune" a system so that it sounds the same on every recording. In the recording you are listening to the sound from the artist as well as the artifacts that result from the recording environment, which can very greatly (room/studio size and acoustic treatment, microphone placement, production style, etc). This is why for tuning purposes I use white noise or tracks purposefully designed to aid in helping to "center" your image. Some songs will have vocals biased towards left/right and you will not be able to get them to sound centered without dramatic tuning techniques that would then be detrimental for songs that aren't biased.
For those of you that currently do have a half-way decent stereo setup to listen too, give Tool's Chocolate Chip Trip a try. This song produces some dramatic pans/sweeps across the soundstage that are pretty fun as well as some drum action that is very pleasing. It's not for everyone but does highlight some cool stereo effects if played on a good system. I played this in my jeep for my girlfriend and she felt like she was high or having some sort of a hallucination, lol. Also, Blue Coast Music (https://bluecoastmusic.com/) has some excellent recordings from some lesser known artists.
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The YouTube channel below is one of the few out there who is actually objectively testing drivers/speaker systems and correlating measurements to subjective impressions of sound quality. Erin, the channels creator, was a valuable contributor on several audio forums that I dabble in. The guy recently invested in a Klippel analyzer (to the tune of $100,000+ USD) for his testing and is really passionate about what he is doing.
I would love to see more of this and less of the ubiquitous "golden-eared" audiofools on YouTube professing their love for $10,000 speaker cables and one's own ability to hear the smallest nuances that result from equipment changes.
Also of interest for some may be the offerings from Purifi Audio, both in terms of transducer design and advancements in class-D amplification. Objective test data as well as subjective reviews are showing that their obsessive pursuit to reduce harmonic distortion (and the technologies they created to do so) have resulted in a driver with some pretty outstanding properties and a rather unique appearance :
purifi-audio.com
I would love to see more of this and less of the ubiquitous "golden-eared" audiofools on YouTube professing their love for $10,000 speaker cables and one's own ability to hear the smallest nuances that result from equipment changes.
Also of interest for some may be the offerings from Purifi Audio, both in terms of transducer design and advancements in class-D amplification. Objective test data as well as subjective reviews are showing that their obsessive pursuit to reduce harmonic distortion (and the technologies they created to do so) have resulted in a driver with some pretty outstanding properties and a rather unique appearance :
PTT6.5X04-NFA-01 (PTT6.5W04-01) - PURIFI transducer loudspeaker
Negligible Force Factor Modulation and Surround Radiation Distortion Low Magnetic Hysteresis Distortion “Real” long-stroke performance: distortion remains low over full excursion Uncompromised midrange performance Designed and Manufactured in Denmark KEY SPECIFICATIONS Driver size 6.5” DC...
purifi-audio.com
I’m gonna have some of those made with the outline of the Tetons.
Billionaires, Line Up!
Billionaires, Line Up!
Pretty cool thread. I learned things...
I bought some of their tweeters ~16 years ago, I think they play to something like 400Hz with a third order.
You can supposedly see little sparks if you run them too hard.
EDIT- I was going to buy some of those Purifi mids and Bliesma tweeters for my bookshelfs but COVID sent postage to stupid prices as I had to use international express so I just bought locally available stuff which will suck in comparison, thanks China.
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As did I. I learned that I should have paid more attention in HS.
I dont have and probably never will have a dedicated listening area where I recline with a smoke and a glass of something strong to listen to music. I wish(?) I had that kind of lifestyle, but I dont.
I simply want airy and relatively precise sound that allows me to aurally differentiate between tracks and instruments...all over the house.
And if doesn't cost me an arm, a leg and a kidney that would be nice too.
I couldn't work out why my headphones sounded better on my phone than on my laptop, I was using a Dragonfly Red DAC on both but it turned out I had the laptop set to 48kHz sample rate which made music sound thin and weird.
Still don't like the current headphones as much as my previous Sennheisers from 2001, wish I'd grabbed some of the Massdrop ones rather than the Focals.
Still don't like the current headphones as much as my previous Sennheisers from 2001, wish I'd grabbed some of the Massdrop ones rather than the Focals.
I still have some 580's I think of that vintage, but the foam around the edge of them has seemingly collapsed within the soft cover material.
Yeah mine were 560 or 80, can't remember.
You can still get all the soft parts and some aftermarket supposed upgrade bits.
Early 80's AKG K241.
New earpieces a few years ago. The headband is a little stretched out, so no big movements. Still sound great. Driven by a Naim Headline2.
New earpieces a few years ago. The headband is a little stretched out, so no big movements. Still sound great. Driven by a Naim Headline2.
Was it shifting things up in pitch by 48/44.1?
Yeah maybe, the Dragonfly lights up green now and green means go.
I am a full blown Audiophile, hahaha!