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- Users: jcx
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Rising cost of "audiophile" equipment and importance of bias/blind testing
not my experience - I was "lawyered" out of a technical response to another poster's question in an "impressions" thread on the technical grounds that I may not own the product - when I never impled the answer was specific to the product as far I could tell a significant fraction of the...- jcx
- Post #105
- Forum: Sound Science
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What wire gauge to use when making cables for IEMS?
26 gage for iem? no one ever heard mechanical stiffness, microphonics from the wire weighting, tugging the iem in your ear? or the silly flex catching dragging on clothes, sending vibrations up the wire? might as well try one of the paralleled CAT 5 diy speaker cable formulas for...- jcx
- Post #3
- Forum: DIY (Do-It-Yourself) Discussions
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comparing live and recorded music
I hoped you would find it more useful - at the very least it should show the methods needed to make repeatable, usable hearing discrimination's that can inform Psychoacoustics models at the level serious professional researchers fare currently engaged with Quote: again you do seem to...- jcx
- Post #74
- Forum: Sound Science
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comparing live and recorded music
didn't read the reference yet did you?- jcx
- Post #67
- Forum: Sound Science
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On High-Fidelity and Equalizing (rant...sort of)
actually "you're wrong, but I don't have to provide any reasoning" is pretty much antithetical to this forum, and so far you sound like you are arguing from your personal "authority" since you don't expand on your objections a few of us have used DSP, written algorithms, implemented filters...- jcx
- Post #40
- Forum: Sound Science
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On High-Fidelity and Equalizing (rant...sort of)
some equalizers distort phase - its helpful to understand the linear systems terms well and use them unambiguously "minimum phase" linear systems have a fixed relation between frequency response slope and phase use a minimum phase EQ with a system that has minimum phase frequency...- jcx
- Post #33
- Forum: Sound Science
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digital theory versus reality
I don't know if this might help johncarm www.davidgriesinger.com/intermod.ppt hmm linking weird/broken, but the top level is a great plce to start anyway Slides from the AES convention in Banff on intermodulation distortion in loudspeakers and its relationship to "high definition" audio.- jcx
- Post #79
- Forum: Sound Science
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comparing live and recorded music
big touring Rock bands are another case - standing, playing in front of literally deafening speaker stacks everyone on stage has isolating iem with their own monitoring feeds from the mixing board - and those aren't what's being sent to the speakers, audience and neither is what is used to...- jcx
- Post #28
- Forum: Sound Science
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comparing live and recorded music
Orchestras definitely have to provide ear protection per OSHA, EU workplace safety sandards- jcx
- Post #21
- Forum: Sound Science
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Smyth Research Realiser A16
are you sure you are familiar with modern audio consumerism? stories sell, bling sells, quality??- jcx
- Post #93
- Forum: High-end Audio Forum
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digital theory versus reality
and it has been checked by real world application digital analog signal theory is one of the most powerful and thoroughly tested applications of math to technology, with "real world results" - its always fun reading of how it can't work over internet DSL connection sending Mbaud of data in...- jcx
- Post #7
- Forum: Sound Science
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Equalization - capabilities and limitations
I've mentioned some "EQ" options a few times: http://www.head-fi.org/t/677809/the-stax-thread-iii/3225#post_10869915- jcx
- Post #3
- Forum: Sound Science
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is this really a problem with blind tests?
there are a few published reports - but as far as I know not replicated, not generally accepted Kunchur, Oohashi both claim it required a minute or so for their subjects to respond to some "conventionally ultrasonic" content https://en.wikipedia.org/wiki/Hypersonic_effect there...- jcx
- Post #75
- Forum: Sound Science
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is this really a problem with blind tests?
long phono cartridge wiring could be problematic with moving magnet/moving iron cartridges also having audibly significant inductance MM cartridges often spec an optimum load capacitance and actually use the LC peaking to hit the target response again added/differing cable capacitance...- jcx
- Post #41
- Forum: Sound Science
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is this really a problem with blind tests?
there's a lot known about the electronics, recording, playback from the EE, "Signals and Systems" perspective - only a little bit of the Psychoacoustic limits are needed to determine that the objective, technical performance of many analog audio electronics are better than relevant demonstrated...- jcx
- Post #22
- Forum: Sound Science
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is this really a problem with blind tests?
not stupid - just not useful - infinite "theorizing" is possible - falsifiable propositions testing/distinguishing specific hypothesis allow advance sometimes accumulation of data/observations lead to hypothesis - but the real test is whether the hypothesis predicts results of new...- jcx
- Post #7
- Forum: Sound Science
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Objectivists board room
a problem for iem recable is the mechanics - the weight, low stiffness, smooth finish can be hard to duplicate with hobby wire, insulation, methods a amp could have a tunable negative resistance to just cancel cable R - but then it hits the rails or even oscillates when unloaded ...- jcx
- Post #1,842
- Forum: Sound Science
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Objectivists board room
hope it works for you but Sound Science struggles with relevance at head-fi the format isn't great and the general forum denizens that have been "protected" from fact based arguments seem to want to come here to provoke and then get offended easily- jcx
- Post #1,828
- Forum: Sound Science
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How do you explain the phenomenon when you first can't hear the difference but you can later?
there is learning, you can train - and you should have objective scoring, immediate feedback to prevent building imaginary correlations the Harmon Golden Ears testing did just that some things have been positively heard as different in ABX by looking at the statistics even when the...- jcx
- Post #11
- Forum: Sound Science
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How do you explain the phenomenon when you first can't hear the difference but you can later?
no one familiar with psychoacoustics and professional audio denies there is learning, and training can make this faster - without references and regularly doing controlled listening however you can easily build a house of cards rather than objective skill responsible pro mixing...- jcx
- Post #5
- Forum: Sound Science
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Schiit Happened: The Story of the World's Most Improbable Start-Up
Transducers aren't perfect, I believe Senn touted 1 dB R/L driver matching for the HD650 - implying that was bragging rights good for, at the time, fairly high end headphones. Given transducer variability, and that amplitude matching R/L is critical to "phantom center", "sound stage"...- jcx
- Post #11,236
- Forum: Jason Stoddard
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Schiit Happened: The Story of the World's Most Improbable Start-Up
http://www.smyth-research.com/ of course announcing the next gen product probably kills current SVS A8 sales - maybe there will be used A8's when the A16 ships- jcx
- Post #11,109
- Forum: Jason Stoddard
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Speaker and Amplifier matching
controls are required in listening tests - "by ear" loudness adjustment isn't adequate - people don't recognize fractional dB loudness different as loudness, but can pick out the difference in AB/X down to 0.2 dB, you should measure V at the speaker to 1% audio memory is also shown to be...- jcx
- Post #7
- Forum: Sound Science
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Schiit Happened: The Story of the World's Most Improbable Start-Up
look again? Quote: Dither is the recommended practice for digital audio any time wordlengths are reduced, which does happen in the consumer DAC end of the signal chain too. There are (at least) three scenarios I can quickly come up with: 24 bit "hi rez" source meeting 16 or 20...- jcx
- Post #10,906
- Forum: Jason Stoddard
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Schiit Happened: The Story of the World's Most Improbable Start-Up
Yes the math is clear, of course the practical limits will still include finite wordlength arithmetic but nowadays is 32 or 64 bits And yes the "infinite" doesn't really apply when the real world audio signals already have noise floors above most better studio ADC converting the signal from...- jcx
- Post #10,900
- Forum: Jason Stoddard