zero oversampling mod.

Posted by: Simo on 16 October 2003

Hi guys,
anyone there try to do this on a old naim cdp (dac td1451)
regards
Simone

this is an actual tread on an italian hi-fi forum and many says it provide much more natural sound with better attack and decay.
http://www.tnt-audio.com/clinica/tnt1541_e.html
http://www.enjoythemusic.com/magazine/viewpoint/0300/zerooversampling.htm
http://www.sakurasystems.com/articles/Kusunoki.html
sorry for my english Frown

[This message was edited by Simo on THURSDAY 16 October 2003 at 17:12.]

[This message was edited by Simo on THURSDAY 16 October 2003 at 17:12.]
Posted on: 24 October 2003 by Simo
http://web.tiscali.it/rogers/misure.htm

first pic: square wave mesurament of a CDP with classic DAC based on tda 1451

second pic: the same cdp connected to a zero oversampling dac based on tda 1451.
Posted on: 24 October 2003 by greeny
Simo

No experiance of this at all, but if you haven't tried you might get more response on th e Pink Fish Forum where they tend to talk about mods a bit more than here,

http://63.99.108.232/forum/index.php
Posted on: 24 October 2003 by domfjbrown
So Simo - are you saying the second (non-oversampling) DAC's output is better then? I can't read (Italian?)?

Curious here - as the Sony CDP101 (the first CD player) is a brickwalled 0 oversampling player as well - never heard one but I'm curious...

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Posted on: 24 October 2003 by Martin Payne
quote:
Originally posted by greeny:
No experiance of this at all, but if you haven't tried you might get more response on th e Pink Fish Forum where they tend to talk about mods a bit more than here,



Yup the Arcam Alpha 5, modified by a certain gent to remove the overclocking, is a firm favourite over there.

Try a search on "AAAA" or "AAAA5".

cheers, Martin

E-mail:- MartinPayne at Dial.Pipex.com
Posted on: 24 October 2003 by Simo
quote:
Originally posted by RichardN:
Dom, have a look around the net for zero oversampling information. http://www.diyaudio.com is a good place to start. Removing the oversampler chip from the circuit is easy on players based around the TDA1541 chipsets.

Now the caveat. With standard analogue filters designed for oversampling a lot of ultrasonic crud will get through to the amplifier. This might affect amplifier stability (potential to make an amp go bang) and will use up amplifier power (amplifying stuff you can't hear.)




it may demage the tweeter too, but many people say is a big improvement to the sound and naim amp cut of the hi freq. at 30000hz so it can work well.
I'd like listen to marantz cd94mkII (2 x tda1451 double crow)Z.O., selected caps and precision master clock, of an Italia "TNTyahoo-goup" member.
Roll Eyes ops! my Cdi too Wink