Thanks George,
I remember using I think it was Toko (now Murata) products, that I got from Digikey. I do recall a multipin package, but not if it had active buffering. I may have used them in an A/D used for speech recognition research. That project is where a local college was doing the research and one of the faculty ad built the A/D front end using the state of the art Sony chip version of the Stockham converter. It was built into a custom made solid copper chassis. When all was said and done it really only delivered 12 bits of accuracy.
I built a few for them with a bit better performance use a larger box, more digital noise shielding and things like a DC servo. Turned out one of the graduate students set up a side business selling copies of my design at a lower price to the school and many of the other working groups!
Now to the important topic of cats! My experience of cats is their persistence of memory is at best a few days and possibly hours. However as we discussed before the fight or flight response is more neuro-chemical. So the agitation remains even after the stimulus is removed. Once the chemicals (drugs if synthetic) wear off, the response becomes normal. With repetition the response is learned.
One of my neighbors has a very smart cat. If outside in the winter when they are not home, the cat comes into my place to visit. Eats a bit if offered and then goes up to the second floor window and waits until it sees their car arrive! Then it is a hurry to leave. The first time I started the laundry while it was dining, it stopped looked alerted and concerned about the new noise. Once it realized it was stationary it went back to unconcerned eating. The only noise thàt really ever alerted it was if I dropped something. That really scared it for a bit. So I don't actually throw trash into the waste basket while it is around. But it does lead me to wonder how much of clutzes the neighbors might be to have trained the cat about falling objects.
It also has been known to join me on the sofa when I listen to music. Although the first time it heard my sound system it did the same alert response.
Now the neighbor on the other side cat isn't as smart. He only recognizes me and comes to play if I stand on a particular staircase. Anywhere else it seems there is no recognition.
Thre is a cat from the neighbor behind my house and it rarely wants to play. Sometimes does other times does the scared response.
Then there are the dogs... My experience is their long term memory is much beter than cats. Only two around, one is well trained to play. The other is new and still a bit shy, but seems to only come around when it escapes owner control. There used to be a few others all from the not so good neighbor. No clue how to train or even handle them, so after about a year they give them away. I did manage to train one to not jump up on me with muddy feet when I came over to give it water as the owners would leave it out with not even a water bowl. (Bad owner, bad, bad...)
It is nice to have pets one doesn't have to really care for! Best regards Bill and Derfy. 😉
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Derfy,
As some records (CDs) are recorded in different studios for different bits there really is no reference standard for the sound.
Now perhaps we can talk about comparing the sounds from a totally electronic source to that of a Strad!
I did once listen to one in a very dead studio. However my full attention was diverted by the quite attractive woman playing it. (A commercial for the band!). ((The local symphony folks often refered to themselves that way.))
As some records (CDs) are recorded in different studios for different bits there really is no reference standard for the sound.
Now perhaps we can talk about comparing the sounds from a totally electronic source to that of a Strad!
I did once listen to one in a very dead studio. However my full attention was diverted by the quite attractive woman playing it. (A commercial for the band!). ((The local symphony folks often refered to themselves that way.))
I'm not smart enough to say whether or not this proposal is true. Because it comes from such a stellar source, my inclination is to assume that I just don't understand. Happens a lot. But my questions about fundamentals are never answered, so I'm unsure of its validity.
The magnitude is clear however: it's either mistaken or "Thanks for the check, your Majesty." Hoping it's the latter.
All good fortune,
Chris
This might be a way to make it up to him
Cats are obsessed with FKA Twigs and we're all super confused
Any words on the acoustics of the room in which the high end audio system like that is situated? I'm asking in case you left it out by accident...
What sounds best to you may not mean anything to someone else.
This is very true. If you’re making a product hopefully the sound you like is liked by enough customers to make a profit.
It has worked for me for the last 50 years. More than 60 years ago, I was correctly picking guitars for their sound.
It could be that what sounds best mostly depend on the target speakers and the typical spl listening level of target user. As an example, for his Firstwatt amps Nelson Pass made 1% H2 @1W for his <10W amp, 0.25% H2 @ 1W for 10-18W amp and 0.05% H2 for 20 - 25W amp but <0.005% for his > 25W Pass Labs amps, most of his current design use what he calls negative phase dominant H2. However, further correlation is still yet to be disclosed. You may as well find FFT measurements really helpful to your research.
Not as well formed but i noted that the Dartzeel NHB-468 put it in the same place:
Firstwatt SIT-3:
Charts from Stereophile.com
dave
Thanks, so the envelope of a instrument is equivalent to the envelope of an electrical system, it makes perfect sense but a wasn't sure and couldn't find any evidence on line.
So few have heard it from that position so maybe not the best choice for the public. How about; center, 1/3 of hall length from the stage?
//
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Ah ah ah! Years and years ( a millennium...) of perfectioning the instruments, the ones that produces a vivid and particular sound, all reduced to an assumption and a conclusion.
I promised to come back with some calculation on the cap value.
C=Ɛ0*A/d
Gives for 4 panels of ca 14x56cm each, a total surface of 0.31m2.
Distance d=2.5mm
Now total Capacity as seen from just 1 side becomes :
C = 8.85e-12*0.31/2.5e-3 = 1.1 nF
That means that two from each side in series presents itself as 0.55nF to the audio signal.
Isn't it amazing that 550pF can produce so much music 😀 😀
It will be quite a job to divide this capacity in 8 separate partitions, so if you can measure them individually, it would be a much more accurate way.
Hans
Ah ah ah! Years and years ( a millennium...) of perfectioning the instruments, the ones that produces a vivid and particular sound, all reduced to an assumption and a conclusion.
The instrument is a machine, and mechanical systems can be represented electrically can they not? The sound waves once in the air are a different matter entirely.
Only the organ is a *machine*
and yet, the velocity of the player defines the different ADSR and how each note combine with the previous and the following
Music itself can be defined as a succession...
and yet, the velocity of the player defines the different ADSR and how each note combine with the previous and the following
Music itself can be defined as a succession...
That's where the wavelets are coming around the corner.
They try to get both optimal temporal resolution as well as optimal frequency resolution in the different parts of time and spectrum.
To be honest, I've never seen a single wavelet on this Audio Forum, so either we can do without or they are too complex to use.
But who knows, there will always have to be a first.
I'm willing to give it a try when someone proposes a representative signal.
Hans
From a musical perspective, the argument about whether the effect of removing the upper sidebands matter is moot, also probably mute 😉 From a technical perspective it's mildly interesting but probably not worth obsessing about.
DSoTM
It bears us to remember how much QC there is in CD manufacture vs how little there was and is in vinyl 🙂
Brief scan of the 900 odd versions released suggests there was a 1994 remaster done by Doug Sax. I would assume that might be it?