Is the "inter-speaker distortion" something other than comb filtering? The technique appears to focus on a smooth bass response, is the inference that if this is right the rest falls into place?
It's tuning bass resonances (unavoidable) preferentially to musical frequencies/notes with goal of reasonably flat bottom end. After that is the result is that if there are comb filtering notches at other bass band frequencies this is subjectively far better than resonances that are off musical frequencies/notes with associated comb nulling of the wanted musical frequencies. Live sound is a situation where there are resonances in abundance,and no opportunity to fine position speakers so the practice is to notch system resonances (graphic eq) to achieve a reasonably 'flat' resultant.....you will almost never see frequencies boosted on a FOH graphic eq. I run two speakers on stands about 1.8m apart with a powered sub in between. I find the L/R and depth fine positioning of the sub is critical to achieving clear solid lively bottom end sound which is the foundation to the rest of the music....if the bass is not right the mids and highs will never be right and resulting in subjective distortion in vocals and highs. With everything positioned optimally, subjectively clean max SPL goes up, everything positions correctly in the image fatigue is removed/reduced and the 'rest falls into place'.
Dan.
So when he is done does he mark the carpet with Gaffa ?.
Dan.
More importantly does he gaffa the customer into the perfect listening position. Audiophilia as a B&D pursuit?
Sampling rate and bandwidth are two different things.
My cheap Rigol samples at 1.5 G samples per sec, my BK Precision 1 G while my TEKMDO3024 samples at 2.5 G samples per sec.
For analog amplifier work, 100 MHz gets you 99% or the way, and a 200 MHz scope is fine.
Mark...
What is the affect of filtering on linearity of DAC?
Most "sound card" type gear linearity start to fall apart below -90-95dBv.
And, with noise, the resulting in numbers which are not accurate and more like a random number generator.
THx-RNMarsh
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Its only Rock-N-Roll. But I like it. i like it.
What is the affect of filtering on linearity of DAC?
Most "sound card" type gear linearity start to fall apart below -90-95dBv.
And, with noise, the resulting in numbers which are not accurate and more like a random number generator.
THx-RNMarsh
------------------------------------
Its only Rock-N-Roll. But I like it. i like it.
If comb filtering is what he meant by inter-speaker distortion, he wasn't talking specifically about bass frequencies?
Yeah, I mentioned digital and a clock. The sample rate of the DSOs mostly scale with the bandwidth and price. To get anything useful (jitter, eye diagrams, etc.) for clocks and high speed serial buses, I don't think you'll find it on anything less than in the GHz range with 10+GSps. I have a 1.5GHz 5 GSPS scope on my desk but it's only good for protocol decode and not even for faster buses like MIPI or PCIe.
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My new chair is higher than the old one so i had to cut the legs down. And I had to put locks on the door so no one else enters the room. And I also noticed an huge improvement in sound when I cut my hair.
Bonsai is correct. For analog, and most audio, 100MHz is a reasonable minimum. Somewhat higher can be useful if you are designing SOTA digital, and to detect oscillations in power supplies, etc. Very high is not necessary, unless you are designing SOTA digital products.
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Yes - I am using the TEK 10:1 probes on the scope and they have auto calibration which is great.
The Rigol and B&K probes are ok for general purpose stuff, but if you are trying to look into the minutiae of say overshoot, I think you have to defer to the TEK.
BTW, I got the TEK as a replacement after the shipping company destroyed my 200 MHz Philips scope when it was returned from Taiwan to the UK. Beautiful analog scope totally trashed - but the TEK ain't half bad 🙂
Spent the afternoon with a rep listening to gear.
We concluded the KEFLS50's are accurate but the B&W 703's are more musical
We Agree! 🙂
The Rigol and B&K probes are ok for general purpose stuff, but if you are trying to look into the minutiae of say overshoot, I think you have to defer to the TEK.
BTW, I got the TEK as a replacement after the shipping company destroyed my 200 MHz Philips scope when it was returned from Taiwan to the UK. Beautiful analog scope totally trashed - but the TEK ain't half bad 🙂
Spent the afternoon with a rep listening to gear.
We concluded the KEFLS50's are accurate but the B&W 703's are more musical
We Agree! 🙂
Probes get expensive quickly over 100MHz. Here are a few lower cost 500MHz probes that won't eat into the usable system bandwidth much. Probemaster seems to have been the source for the older Tek probes, since they look identical, so they should also have parts suitable for them. https://www.digikey.com/products/en?keywords=Oscilloscope Probe CT3288ARA 72940-8 Pomona Electronics | Mouser https://probemaster.com/5900-series-500-mhz-oscilloscope-probe-10x/
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Ya, maybe. I've run into a problem where 300mhz+ is needed, and that's where things start to really climb in $.
Don't know exactly. Sometimes audible effects are linear, sometimes maybe not. Unfortunately, not equipped to investigate the question here.
I generally use a 350MHz scope, but I also have a 100MHz (storage) scope, and a 60MHz digital scope. ' Horses for courses. ' Only one time did I find with the 350MHz scope what a 20MHz scope could not. It was important, but then only once did a problem come up over the years.
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