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In the Forum: Audio Discussions
In the Thread: Crossover Design
Post Subject: It might makes no difference to YOU.Posted by Romy the Cat on: 1/6/2012
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 Kerry Brown wrote:
A digital crossover with lower bit depth and sampling rate than the recordings it's processing won't deliver maximum sound quality; unfortunately my DEQX crossover is limited to 24/96 so it can't process hi-res digital files ( early DEQX processors were limited to16/48 ). 

Of cause a crossover sampling rate has absolutely no relation and no connection with recordings sampling rate. The facts that somebody insist I this relation is absolutely laughable.  

 Kerry Brown wrote:
Digital crossovers are expensive compared to active analog crossovers.
 Quite opposite. digital crossover are very cheap, the entire operation is make in $0.5 chip and the rest is juts bells and whistles….
 Kerry Brown wrote:
A digital crossover with lower bit depth and sampling rate than the recordings it's processing won't deliver maximum sound quality; unfortunately my DEQX crossover is limited to 24/96 so it can't process hi-res digital files ( early DEQX processors were limited to16/48 ). 

Of cause a crossover sampling rate has absolutely no relation and no connection with recordings sampling rate. The facts that somebody insist I this relation is absolutely laughable.
 Kerry Brown wrote:
Digital attenuation is not a problem with 24 bit processors processing 24 bit recordings. Quantization errors, the only ones specific to digital filters, are not audible when this is the case.

Yes, it is what the people who sell digital toys to gullible and deaf audio people are trying to “publicly state” in order others to repeat it.

 Kerry Brown wrote:
Even 16 bit processors can attenuate up to 8 bits without audible 'rounding' errors.  ). 

Kerry, is it something that you recognize yourself or it is something the somebody told you?

 Kerry Brown wrote:
In terms of dynamics, 6 dB of digital attenuation equals roughly a 1 bit loss of resolution and a 50% reduction of dynamic range. This also applies to analog attenuation .

What?!

 Kerry Brown wrote:
The solution is to use a crossover - digital or analog - with high voltage output. ( Sensitive systems like horn speakers must use amps with low input sensitivity, or you can use voltage splitters. I use voltage splitters. ) You get decreasing Sound to Noise ratios with lower voltage signals whether you use analog or digital filters.

Kerry, do not even enter the conversation about S/N ratio. You have absolutely no idea what happen with digital signal at stop band.

 Kerry Brown wrote:
Finally, if the DAC chips in a digital crossover are limited to a SNR of 120 dB, as they usually are, a 24 bit processor ( w/ a dynamic range of 144 dB ) loses 24 dB of dynamic range. In this case the DAC chips themselves add noise to the signal. So an analog crossover can sound better than a digital one if attenuation ranges greater than 24 dB must be achieved. If the range of attenuation is less than 24 dB, a 24 dB processor should give more than satisfactory results with 24/96 files.

Kerry, stop to reiterate the foolishness that you most likly do not understand yourself and make a simple listening test. I told you: take uncompressed file, reduce volume by any amount of dB and listen results. If you do not find that digital attenuation made any difference then… it makes no difference to ... you.

Rgs, The Cat

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