Hi, while browsing some "audiophile" web site i found the banner of this product :
Taddeo Digital Technology . The technical "explanation" from this page seems to me pure audiophile snake oil from the beginning to the end.
As a long time "leecher" of this board i would like to know some "experts opinions" about this product (trying to discuss audio with true audiophile is a very hard task ).
Btw, thank you very much for your efforts to bring obiective metods to the wild world of hi-fi

EDIT: btw Hello Shark! Welcome to posting on HA - glad you enjoying lurking!


What is really happening with this product? A simple "delay and add" makes a comb filter. The parameters chosen will cause the first minima to be outside the audio band, but there will be gentle attenuation starting from well within it, as the article suggests. So, you'll hear a difference: they'll be less treble. Cue audiophile claims of how their system now sounds less harsh!


Figure 1 looks like a pure delay to me - that's not a phase error!

Photo 4 is the 1kHz square wave again - not a 22.kHz one.
The "Taddeo Digital Antidote" reduces the ringing because the filter is very gentle, and cuts more high frequencies. No magic. You could do it esaily in the digital domain and achieve identical results.

Photo 3 shows a scope triggering off the peak value in a white noise sample. Any white noise generator with a finite bandwidth is going to give that curve at the start, though it will be less sharp if the bandwidth isn't curtailed steeply.

"The Problem" and "The Solution" is just rubbish. There are no such phase errors.


There's several similar and relevant threads in the FAQ. I remember one where someone uses a similar device instead of the filter on the output of their DAC.


This isn't placebo - it will sound different. It would improve bright sounding CDs. So does a treble control!


Cheers,
David.

Hi 2Bdecided, thx for the great analysis
btw, one thing always puzzled me: very often the effect of this kind of device on the signal is a simple lowpass filtering...the same applies to some "zero oversampling" cd player equipped with only analog output filter or the digital filters settings used by pioneer (IIRC they call it "legato-link").
Would be interesting to see if there're psycoacoustics studies about the subjective advantage of this kind of rolloff even if is "less hifi" than the true flat freq. response.
Maybe the audiophiles like to cheat theirself with some exotic pseudoexplanation
instead of simply admit to like a sound with less hi-freq