Click title to read one, or click date to read all below it.
01-25-05
Non-integer sampling frequency conversion is no big deal. th ... Eldartford
01-26-05
This is the one and only experience i have had in listening ... Trelja
01-26-05
Treja, i would have loved to have been there. i have only co ... Muralman1
01-26-05
Upsampling may or may not sound better depends on overall de ... Megasam
01-26-05
I own an ah! 4000 cd player with the optional upsampler boar ... Darrenlite
01-26-05
If an when you got an upsamiling player do you know what the ... Izsakmixer
01-26-05
An above response having to do with individual preferances r ... Unclejeff
01-26-05
I agree with megasam, specs dont tell you anything about the ... Blkadr
01-26-05
Check out what audio research has to say about it with their ... Brauser
02-02-05
Get an 8.5 x 11 piece of paper and a pencil. now draw a s ... Sean
02-02-05: Bombaywalla
Sean,
basically your "kinda - sorta the "quick and dirty" explanation" is pretty good for the layman.
I have objections on some of the text you posted:
* Audio Note eschews much of the filtering and gets rid of the oversampling, which reduces a LOT of the in-band noise and distortion
How does getting rid of oversampling & eschewing much of the filtering reduce IN-BAND noise & distortion???
AFAIK, anything in-band cannot be touched. It's sacred as it's THE signal we are looking for. If noise exists in-band or if distortion exists in-band, you basically have to live w/ it OR design better electronics. What you wrote will not do the trick.
* At the same time, it can introduce out of band noise and distortion into the equation
what are you referring to here? i.e. when you write "it can introduce....", what is "it"??
* Obviously, the key is to find a way to increase the sampling rates to recover more of the data
Increasing the sampling rate does NOT recover more data. It, however, allows the discrete-time system to follow the original analog data more truthfully. This is evident from your section A, section B example.
On a historical note, Philips is the co. that is to be credited or discredited with the concept of upsampling. The original idea at Philips Reasearch Labs was to somehow get that analog filter order lower & that transition band less steep. In the original redbook spec, the transition band is 20KHz-22.05KHz. Upsampling was the answer from an engineering perspective & from a cost prespective. They really didn't care about the sonic effects back then.
FWIW. IMHO.
Bombaywalla (System | Reviews | Threads | Answers | This Thread)
02-02-05
Bombay: your own description answers the problems that you q ... Sean
02-02-05
Mathematically, there are no differences between upsampling ... Germanboxers
02-02-05
Phillips used 4 times oversampling in their first cd players ... Eldartford
02-02-05
The term "error correction" applies to a scheme wh ... Eldartford
02-02-05
Thanks for the feedback sean. putting your orig. & 2nd post ... Bombaywalla
02-03-05
El said: "in sean's explanation the second set of 20 do ... Sean
02-03-05
El said: "in sean's explanation the second set of 20 do ... Sean
02-03-05
Eldartford's sentence: "in sean's explanation the secon ... Bombaywalla
02-03-05
Sean...the sampling (your first set of dots) is at 44.1khz. ... Eldartford
02-03-05
Bombaywalla...your check is in the mail :-) Eldartford
02-03-05
Sean....homework is to read.. http://en.wikipedia.org/wiki/r ... Eldartford
02-03-05
Sean, in fact, jeff kalt of resolution audio was marketing a ... Germanboxers
02-03-05
The connect-the-dots metaphor is really unfortunate, because ... Pabelson
02-04-05
Pabelson...according to nyquist, just two (error free) sampl ... Eldartford
02-04-05
You guys are all correct. where i "fell down" on ... Sean
02-04-05
Pabelson...according to nyquist, just two (error free) sampl ... Eldartford
02-04-05
You guys are all correct. where i "fell down" on ... Sean
02-04-05
Not quite, eldartford. a digital system cannot accurately re ... Pabelson
02-04-05
Germanboxers, basically, you are correct in pointing out tha ... Bombaywalla
02-04-05
Pabelson...i guess you mean that if the sine wave frequency ... Eldartford
02-04-05
Since sean has confessed his error, i will do the same. my e ... Eldartford
02-04-05
The esoteric dv-50 is another player that does not use 96k, ... Irishdog
02-04-05
Hmmm... i'm surprised that nobody jumped all over me for sta ... Sean
02-04-05
Sean, thank you for all the diagrams, and patient tutoring. ... Muralman1
02-04-05
More corrections! they don't affect the basic idea, but coul ... Eldartford
02-04-05
As long as human beings are analog, the initial & final musi ... Bombaywalla
02-04-05
El: thanks for correcting my previous errors, your previous ... Sean
02-05-05
Bombaywalla...it's an interesting question about whether the ... Eldartford
02-06-05
Eldartford, good observation indeed! it would be like splitt ... Bombaywalla
|
|
