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dougspeterson
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Software that allowed you pre/post/delta analysis of system changes?

A couple years ago one of the cable companies demonstrated software that could look at signals sent thru your system, then do the same after changes, such as cables, stands, etc., on the one dimensional signal stream. A dream come true, objective analysis of component changes that all could see. Graphs were shown of significant changes to the wave form with changes such as different electronics, vibration supression pads, etc. Word was a consumer version would be available. However I have never seen a follow up. Anyone know what happened. John?

Doug Peterson

Kal Rubinson
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There are many test programs

There are many test programs out there and some offer more than "one dimensional signal" analysis, depending on the resolution and platform required.  The real cost is usually in the interface that provides that transduces the stimulus and output and connects your computer to the outside world.  You might start with a look at TrueRTA (http://www.trueaudio.com/rta_abt1.htm).  

However, I think you are barking up the wrong tree if you think you can measure the effects of cables, stands or vibration suppression pads. See http://www.audioholics.com/education/loudspeaker-basics/audio-measurements for a basic introduction to some of the issues.  

dougspeterson
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I found it: Nordost white paper

http://nordost.com/default/downloads/NewApproachesToAudioMeasurement.pdf

I was a skeptic and still am. It is not a spectrum analyser Kal, but much more complex. That might be the problem. "Measurements you can hear!"

Kal Rubinson
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Interesting but Googling did

Interesting but Googling did not reveal any information about the measurement system from Acuity Products Ltd at all. There are references to its use but nothing about what is actually being done.

dougspeterson
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response from Nordost:

Tech support responded to my inquiry about the paper. They had shown this process at one of the shows a couple years ago:

"Thank you for your enquiry. I still have fun reading this article. We are continually working on this and have not produced anything for the web yet."

 

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