DIY hifi source - Page 5 - diyAudio
Go Back   Home > Forums > Source & Line > Digital Source

Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 15th February 2013, 01:16 AM   #41
diyAudio Member
 
Join Date: Sep 2008
Location: China
Quote:
Originally Posted by marce View Post
Are you saying that there is a difference to the digital data from different sectors, so a song recorded on one portion of a hard drive will sound different from the same song (and digital data) stored at a different location?
data is the same, but, playback sound has a little bit different.
we use prism sound ada-8xr + mm27

at the beginning of co-operation, one of our OEM customers told us local playback is much more clear than network play (file store in UPNP server), different class network cable will have different sound, that explains why Linn's player's playback quality is not as good as their own obsolete CD player.

also, playback route causes different sound, shorter will be better, so we have an invonation to make the shortest playback route and use FPGA as the output timing control. that will suppose to solve all above affection in theory, but who knows the real result cause different sector in SSD will have different sound...

I do have some articles in Chinese that tells why there will be different sound by pc playback... but no time to translate into english, mainly cause by memory latency, that's deep involve hardware, a little hard to explain in some words only.

BTW, our machine will be available soon after we tested a year long.

Last edited by powerpan; 15th February 2013 at 01:33 AM. Reason: add something
  Reply With Quote
Old 15th February 2013, 09:13 AM   #42
marce is online now marce  United Kingdom
diyAudio Member
 
Join Date: Jun 2007
Location: Blackburn, Lancs
Hmmm I do struggle with this concept, that data from different sources that is bit identical when passed through all tghe pathways of the system sounds different, it goes against all digital engineering principles. Where does the difference come from, if you present the same (exact bit match) data to the SPDIF out or the DAC from any digital storage source, be it solid state or a hard drive, it is exactly the same data and cannot sound different, it is impossible. You are presenting the same bit pattern to the DAC so will get the same analogue stream out (let us ignore system noise as we are discussing just the integrity of digital data). The same reason why I can store photos on Flickr, my hard drive a SSD, when accessed they are exactly the same, the bit pattern is the same and they look the same.
Agian with the cable, sorry its digital, if the data is getting from point a to point b unchanged there is no difference, if there is then the bit pattern will be different, if the bit pattern is the same the sound will be the same, this is true audiophile myth territory.
Audio digital signals are trated like any other digital data within the system, and the systems are very good at moving data from a to b uncorrupted, I have yet to see any proof otherwise.
  Reply With Quote
Old 15th February 2013, 09:33 AM   #43
diyAudio Member
 
sofaspud's Avatar
 
Join Date: Nov 2005
Location: San Antonio
I'd question whether a song (or any large data file) is recorded on just one portion of a hard drive. Wouldn't it be located across several sectors, in an order determined by the disk controller?
__________________
It is error only, and not truth, that shrinks from enquiry. - Thomas Paine
  Reply With Quote
Old 15th February 2013, 10:00 AM   #44
erin is offline erin  Australia
diyAudio Member
 
Join Date: Nov 2006
Location: http://www.makeitpossible.com/
Quote:
Originally Posted by marce View Post
I have yet to see any proof otherwise.
I've seen the proof, with digital images, and heard the proof with digital audio files. (pun intended)
Check-sums the same!
Looks different and sounds different.
Verified by multiple independent people, on various systems.
No person taking part had any commercial interest in the matter.

Sorry Marce, as far as Im concerned, its been verified lock stock and barrel.

Its not a matter of theory. We all know the digital theory. In fact, no one is disputing the theory.

The matter of contention is in fact, that despite the bits being bits, and the check-sums being the same - digital images and audio can look different!

The evidence may be presented by the research group one day. But in the middle of another persons thread is not the time and place.
__________________
Listening is best done using a pair of ears.
  Reply With Quote
Old 15th February 2013, 10:04 AM   #45
marce is online now marce  United Kingdom
diyAudio Member
 
Join Date: Jun 2007
Location: Blackburn, Lancs
Depends on how fragmented you disc is, it could be spread over multiple sectors or on contigous ones, because of the speed of transfer even of traditional hard discs this is of no consequence. But the DOS controls all that and fetches the data, with no problems especially when you consider the size of an audio track, it is loaded into the buffer and passed down the line to the next stage in it journey from long term storage to eventually the dac. To the DOS data is data, be it a picture an audio file or a word document.
Quote:
different class network cable will have different sound
This would only be true if one cable was corrupting the data, as data transfer uses check sums data packets etc to guarantee data integrity again this is an audiophile myth, I have heard some say it is low level digital distortions, sorry but that is a load of ...the data is either intact or it isn't, you cant get a zero and a tiny bit otherwise we would be back to analogue.
  Reply With Quote
Old 15th February 2013, 10:08 AM   #46
marce is online now marce  United Kingdom
diyAudio Member
 
Join Date: Jun 2007
Location: Blackburn, Lancs
Proof, engineering proof not audiophile bull... speculation.
This forum, the internet would not work, CAD especially 3D would be impossible, planes trains and automobiles would crash....
Subjective views that you want to fool yourselves with, sorry but bit perfect means bit perfect
  Reply With Quote
Old 15th February 2013, 10:23 AM   #47
erin is offline erin  Australia
diyAudio Member
 
Join Date: Nov 2006
Location: http://www.makeitpossible.com/
You have missed the point.
__________________
Listening is best done using a pair of ears.
  Reply With Quote
Old 15th February 2013, 11:04 AM   #48
marce is online now marce  United Kingdom
diyAudio Member
 
Join Date: Jun 2007
Location: Blackburn, Lancs
Can be percieved as different but actually are not different, where have I missed the point. We should not postulate such theories. Saying that a picture (or a track) stored on a hard drive will look sound different from a picture (or track) stored on a SSD drive when the bit pattern is exactly the same is wrong.
  Reply With Quote
Old 15th February 2013, 11:17 AM   #49
sandyK is offline sandyK  Australia
diyAudio Member
 
Join Date: Apr 2007
Location: Sydney
Martin Colloms and others, have also verified that .bmp images saved from the same frame (00.34.00) of the same .ts file stored at different locations
(Christina Aguilera-David Letterman Show) using Corel ULVS12 can look a little different, and the viewer's preference changes when the location of the side by side images created using Photoshop is reversed.
The difference MAY possibly be due to something like low level wideband noise ?
  Reply With Quote
Old 15th February 2013, 11:20 AM   #50
marce is online now marce  United Kingdom
diyAudio Member
 
Join Date: Jun 2007
Location: Blackburn, Lancs
What is low level wideband noise in relation to a digital file, is it stored with the data.
A digital file is a digital file and if they match bitwise they are exactly the same, no difference what so ever. If just one bit is different then they are different, but if bitwise the files match they are the same.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
TivX 3000U for Hifi Digital Source mbon Digital Source 0 21st May 2005 09:04 AM
A DIY piece of furniture for your DIY HIFI stuff? Bricolo Everything Else 74 31st August 2003 10:14 AM


New To Site? Need Help?

All times are GMT. The time now is 09:40 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2