Probably because most in high end audio are incapable of writing software and the cost to license existing modules or drivers may be high.
Current best practices for EMI are to use a ground plane instead of a star. For low level high gain stuff its quite challenging but possible. Really understanding the current flow through the system is the key. Its also really relevant for the clock distribution. Running fast edge clock or I2S lines is also a real EMI challenge. They can all radiate like crazy. You can bottle it all up inside a sealed metal shell (metal sculpture?) but it will get into any sensitive circuitry inside the box.
Good layout and chassis design are one time costs. There is no valid rationale for savings there. Controlling EMI at the source is also good practice. While it might make no difference in the audio output you cannot be sure and why not do it right?
Good layout and chassis design are one time costs. There is no valid rationale for savings there. Controlling EMI at the source is also good practice. While it might make no difference in the audio output you cannot be sure and why not do it right?
Quite so. Found that USB boards radiate EMI and the EMI does affect dac sound quality if not carefully managed. Good practices should not be neglected.
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Hard to believe. If I had read nothing from you, then this one post would
be enough for your complete self destruction. A completely brain dead collection
of buzzwords without the slightest coherence.
As if a linear time invariant thing, such as a bend could create jitter.
"at least use Eagle software" ROTFL. Entry level hobbyist software, mostly used
for its free, size limited version (as in free beer). I can't tell a product below that
in the pecking order. And you dare to propose it's top 10 tips as educational material?
Hint: Anything that has SN74 in its type number does not qualify as "fast" nowadays.
< Cargo Cult Science >
My guess is: there is no business case for this technology. OTOH, do you see the kind of JC or RNM business writing software (or hiring somebody to do a good job)?
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Audiophiles that look under the hood, that's a stretch. Even more of a stretch is high frequency looking components whatever that means. This is only one step away from gold sounds bright, lead sounds dull.
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The problem is that audio is among the easiest topics in electronics and
beginners flock there for that reason. Once they have tried their first copy
of a gain clone kit they feel like experts. Having no metrology access, the
subjectively perceived sound is necessarily the standard. Understandable
for a teeny, but for an deaf old f*rt, one should expect some progress.
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The layout must gave been done without computer. It's a blast from the past
when we were using crepe paper and Bishops prefabricated DIL symbols.
When we had finished the artwork, we would spend the rest of the day in the
darkroom with the repro camera.
Do the 9 ps risetime scope and the uwave vector network analyser 40 cm
from this keyboard count?
ADS, Empower, Sonnet, AWR? Comparing a hydrogen maser and a cesium
and locking them together? The pulse strecher to measure the photon flight time
from ground to ISS with 5 ps resolution? 10 GBPS fiber optic transceivers?
Eagle user? NOT!
Altium 20 now supports any-angle routing so you can get a bit closer to a hand drawn look if you want. I can’t recommend updating yet if you’re using a previous version though; the UI thread freezes with alarming regularity. I have to kill it multiple times per day.
No, Gerhard! FYI it can be done in modern software. I did mine in Accel EDA, the predecessor to P-CAD (now Altium Designer).
Now, let's start bashing Levinson products
Altium did buy P-CAD at some point and kill it, but I think the Altium Designer software itself traces back more clearly to Protel. Maybe one day they will stop adding 5 million features per release and make it more stable.
Mine is bigger, 7pS from an 11801C with the 40GHz sampling head. Noisy as hell, though, the 20GHz sampling heads are much better noise wise.
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