Just as a sign how Big Brother is watching our Internet traffic, I received this link
Welcome to Loudandproud - Loudandproud
Never heard of them, never searched for second hand audio products, but nevertheless.
Hans
Welcome to Loudandproud - Loudandproud
Never heard of them, never searched for second hand audio products, but nevertheless.
Hans
Maybe someone sold them a whole whack of IP or email addresses.
These things happen you know, despite’s laws against it.
Just ‘sayin.
These things happen you know, despite’s laws against it.
Just ‘sayin.
What is wrong? This feels like a general slur. Have you seen Elvees last innovation?
Do you really expect me or anybody else to uncover his/her secret sauce on this thread? Pearls before swine. This coming from a man who builds a power amp on the schematic of somebody else, gets something wrong, and subsequently displays considerable lack of basic understanding when it comes to getting it right.
This is meant as criticism, not an insult. I appreciate you as a human being.
It's time that you learn what the terms "false positives" and "false negatives" really mean. It has nothing to do with "playbooks" or "audio business" but is just a matter of statistical hypothesis testing.
Therefore it came up again wrt fMRI and/or Pet-Scans, as both are used as a diagnosis tool for severe illness.
One wants to avoid both errors, the false positives as it might lead to totally unnecessary treatments/interventions and the false negatives as it might lead to undertreatment.
And therefore the Benjamini/Hochberg correction method could be helpful as it lowers the rate of false negatives.
You have to educate yourself to avoid the constant fooling yourself in the future, and - as said before - reading opinion papers by Peter Aczel do not help. You need a good solid introductory textbook on statistical hypothesis testing and inference, if you need some recommendations just ask. 🙂
Yes, I do expect that some would do that. I would. Elvee is good one. Do YOU have any is the question?
One of the really cool things about EDN is the Design Ideas section, where readers can post their circuit tricks/modifications and idea for a new circuit or system, and others can comment on it, suggesting improvements or pointing out flaws.
As to the PA saga... you dont know anything about it. Just making up stuff out of your imagination. Again.
Assumptions are not facts.
THx-RNMarsh
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Instead of putting sleeves of amortissement material on the walls, glue them in the middle in cross in such a way they cut the volume in eight.
See attached.
Attachments
You'll need to cut the room for the bass speaker. It is enough.
But if you can keep the sleeve parallel to the front/back wall closed, It will help to flatten port resonance: Better damping on kick drums.
Bill, Bill, Bill,
Aged is much better! In fact fossilized dinosaur ones are the best. Fortunately I have a good source of them at quite reasonable prices.....,
RNM,
As I suspect you are aware I take little here seriously.
I currently have a 6 part article on linear power supplies going in Aydioxpress. Most of which was discussed here years ago when I was doing the research. Next up I may do one on fuses as was discussed here also.
The most recent circuit technique shown here was how to use a resistor to reduce the value of the DC blocking capacitor in a feedback loop.
Of course the bits about resistor and capacitor selection are now reasonably well known.
Now your request has actually brought out a few more bits of interest.
Surprisingly I have met younger folks specializing in analog circuitry, however their world is strongly simulation based.
Long long ago, but not far away I used to keep interesting circuit bits on 3x5 cards in a small box in my desk as I came across them.
As I suspect you are aware I take little here seriously.
I currently have a 6 part article on linear power supplies going in Aydioxpress. Most of which was discussed here years ago when I was doing the research. Next up I may do one on fuses as was discussed here also.
The most recent circuit technique shown here was how to use a resistor to reduce the value of the DC blocking capacitor in a feedback loop.
Of course the bits about resistor and capacitor selection are now reasonably well known.
Now your request has actually brought out a few more bits of interest.
Surprisingly I have met younger folks specializing in analog circuitry, however their world is strongly simulation based.
Long long ago, but not far away I used to keep interesting circuit bits on 3x5 cards in a small box in my desk as I came across them.
Tried stuffing them for test. Doesn't sound like cab is stiff enough to be optimal in that mode.
Following the traditional understanding of psychoacoustics; single parameter for single parameter, like differences in level, differences in pitch or phase and sometimes even related impressions like "roughness" and the reasons for this impression.
Very different test regimes used but indeed music rarely in use as stimulus.
From the discussions around it seems that a lot of people often had a crude understanding of the definitions and terms used in these experiments and accordingly what the results could mean.
For example often they do not realise that the so-called threshold number is just an estimation for the mean of the assumed distribution in the population. It is often mischaracterised as if it were a hard threshold for all humans.
Otoh, it is often shown in experiments that some of these parameters have higher (sometimes much) thresholds when done with music instead of special test tones. The development of lossy compression encoding schemes seemed to further corrobate the hypothesis that a lot of the differences attributed by the so-called "golden ears" to real differences of the used equipment can't be real.
It is just a part of the great debate; from my point of view it started because people were not interested in finding out if perceptable differnences exist but instead were deeply convinced that no audible differences should exist.
And accordingly appreciated any negative result. For whatever reason they thought they knew about propper testing methodology and therefore apparently did not study the literature when developing the new ABX-test.
Well founded critic on the (like from Leventhal in 1984/6) wasn't appreciated and so the generally good idea of controlled listening tests (propperly designed and well executed) was replaced by a test regime of questionable merit used by people who obviously did not think about hypothesises that should be tested but instead just used it like a cooking recipe.
Otoh again, real difference must be detectable in controlled experiments but if neither side is able to accept results contrary to the belief, no progress in the great debate is possible.
But of course, it is hard to understand where the hostility comes from.
Of course but different topics; if there were strict seperation in the discussion it should work, but if one wants to discuss something based on evidence and it gets interjected by statements about anecdotal impressions it gets difficult again.
Surprisingly a lot of people can't live with uncertainty, they need the comforting assurance to know what the "TRUTH" is; add the usual ego drive and the anonimity of conversation and the fights begin to start.
If the new evidence I've listed in the last post is accepted, then accordingly the old line of reasoning (based on the known thresholds) must be abondaned, but what the new one be?
Accepting the evidence means to accept that we up to now still don't know enough the multidimensional evaluation using music as stimuli to predict results wrt audibility of differences.
Here my EDN design idea. IIRC I got $150 for it when they were still dishing a bit of dough out.
Low_cost_isolation_amplifier_suits_industrial_applications
You will have to download the article to read the full description.
It’s been referenced in one or two papers which is quite cool.
I have already given you 2 new ideas, a Nested Error Feedback and a Virtual Accu Supply.
When are you showing us some of your own original ideas ?
Hans
?? I have many times. One was how to lower speaker driver distortion with only one resistor added to PA.
The question isnt for me but for all to participate. Pls give source info so all can find your 2 mentioned, pls.
-RNM
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