[Arny Krueger]

For decades there has been considerable hand-wringing (no pun intended) over
so-called "Digital Ringing".

By this I mean the ripples that one sees in technical tests, where a digital
device such as a CD player is called upon to reproduce a high frequency
square wave.

For example:

http://www.stereophile.com/cdplayers...cs/index2.html

"Finally, what of the KCD-40's high-level performance? Fig.8 shows the
manner in which it reproduces a 0dB, 1kHz squarewave. The symmetrical
ringing reveals the linear-phase nature of the Sony 8x-oversampling FIR
digital filter chip."

http://www.diyaudio.com/forums/showthread/t-6901.html

"The initial brickwall filters in the early days of CD players generated
some nasty looking square waves as well. Not only taking away the high
frequency sine waves causes post and pre-ringing, but screwing up the phase
alignment of those sine waves does as well. Non-linear phase analog filters
create nasty square waves. "

http://www.jstor.org/pss/3679772

"Evaluation of Phase Correctors" describes expensive hardware to alleviate
this so-called "problem".

How many audiophiles think that these artifacts are something to be
concerned about from the stand point of audibility?

[Steven Sullivan]

Arny Krueger wrote:
For decades there has been considerable hand-wringing (no pun intended) over
so-called "Digital Ringing".

By this I mean the ripples that one sees in technical tests, where a digital
device such as a CD player is called upon to reproduce a high frequency
square wave.

For example:

http://www.stereophile.com/cdplayers...cs/index2.html

"Finally, what of the KCD-40's high-level performance? Fig.8 shows the
manner in which it reproduces a 0dB, 1kHz squarewave. The symmetrical
ringing reveals the linear-phase nature of the Sony 8x-oversampling FIR
digital filter chip."

http://www.diyaudio.com/forums/showthread/t-6901.html

"The initial brickwall filters in the early days of CD players generated
some nasty looking square waves as well. Not only taking away the high
frequency sine waves causes post and pre-ringing, but screwing up the phase
alignment of those sine waves does as well. Non-linear phase analog filters
create nasty square waves. "

http://www.jstor.org/pss/3679772

"Evaluation of Phase Correctors" describes expensive hardware to alleviate
this so-called "problem".

How many audiophiles think that these artifacts are something to be
concerned about from the stand point of audibility?


A certain type of audiophile starts from the assumption that *any*
difference is audible..to them. Stereophile is one of their redoubts.

--
-S
Poe's Law: Without a winking smiley or other blatant display of humorous
intent, it is impossible to create a parody of a religious Fundamentalist that
SOMEONE won't mistake for the real thing.

[Codifus]

Arny Krueger wrote:
For decades there has been considerable hand-wringing (no pun intended) over
so-called "Digital Ringing".

By this I mean the ripples that one sees in technical tests, where a digital
device such as a CD player is called upon to reproduce a high frequency
square wave.

For example:

http://www.stereophile.com/cdplayers...cs/index2.html

"Finally, what of the KCD-40's high-level performance? Fig.8 shows the
manner in which it reproduces a 0dB, 1kHz squarewave. The symmetrical
ringing reveals the linear-phase nature of the Sony 8x-oversampling FIR
digital filter chip."

http://www.diyaudio.com/forums/showthread/t-6901.html

"The initial brickwall filters in the early days of CD players generated
some nasty looking square waves as well. Not only taking away the high
frequency sine waves causes post and pre-ringing, but screwing up the phase
alignment of those sine waves does as well. Non-linear phase analog filters
create nasty square waves. "

http://www.jstor.org/pss/3679772

"Evaluation of Phase Correctors" describes expensive hardware to alleviate
this so-called "problem".

How many audiophiles think that these artifacts are something to be
concerned about from the stand point of audibility?



So what is debunked? All those links refer to and acknowledge that
filtering in digital audio produces significant phase shift.

To clarify what I was trying to say in another thread about imperfect DA
conversions, In CD audio, as opposed to analog vinyl, the imperfections
such as phase shift, hardshness etc, is made more apparent due to
digital audio's greater resolution much quieter S/N ratio, and greater
dynamic range.

Yeah, analog vinyl may have had all these imperfections as well, but it
got "lost in the medium," somewhere between disc surface noise, wow and
flutter, and limited resolution.

There is some truth to vinyl sounding better than analog, and when CD is
perfected, if it hasn't been already, the last and most significant
hurdle will be the DA converter, more specifically the filtering and the
analog section. CD will have completely blown away vinyl that it would
be like comparing today's CD player to the 1st record player in the
early 1900s that you see in those old black and white movies. You know,
the ones with those giant needles that use this big seashell type horn
for amplification. Oh, and let's not forget about the needle bouncing up
and down on the record as if it was a ship going across the ocean in
unstable waters

CD