In article ,
Andy Evans wrote:
We're talking engineering here - Fays metals, Chiswick.

You're talking engineering *materials*, not engineering.

The difference is quite audible, as I said, so I'm interested in knowing
how resonance dampening affects CD transports.

It can only have an effect if the transport is subjected to external
vibration sufficient to make it miss-track in some way.

--
*Work like you don't need the money. Love like you've never been hurt.

Dave Plowman London SW
To e-mail, change noise into sound.

I could tell you how to easily do a representative set of measurements(AK)

But evidently you can't explain an obviously audible phenomenon.

=== Andy Evans ===
Visit our Website:- http://www.artsandmedia.com
Audio, music and health pages and interesting links.

In article ,
Andy Evans wrote:
But evidently you can't explain an obviously audible phenomenon.

Trouble is, Andy, most of your posts concern 'audible phenomenon' that
only you can hear...

--
*Born free...Taxed to death.

Dave Plowman London SW
To e-mail, change noise into sound.

On Sat, 06 Nov 2004 09:07:13 +0000, Ian Molton wrote:

mick wrote:

I read somewhere (sorry, can't give a ref) that the error correction on
transports intended for audio is more lax than on those intended for
data, as your ears are incapable of detecting low error rates but are
more sensitive to the gaps caused by error correction. If that is so,
then using a data drive for audio may give a different sound, but not
one that is necessarily "better" as it will contain a different sort of
inaccuracy! I'm sure someone will be able to correct me on this if I'm
wrong.

Thats wrong, however IIRC there is less error correction *data* on the CDs
themselves for redbook audio than an ISO9660 disc.

Cheers, Ian. I wasn't sure - it was a while ago that I read the item &
I've no idea where I saw it. My memory is c**p... ;-)

--
Mick
(no M$ software on here... :-) )
Web: http://www.nascom.info

The difference is quite audible, as I said, so I'm interested in knowing how
resonance dampening affects CD transports.

It can only have an effect if the transport is subjected to external vibration
sufficient to make it miss-track in some way.(DP)

Why not internal vibration? This is considerably larger than anything external.
As I've said, the effect of damping the motor vibrations by fixing it to an alu
slab is most audible in highly modulated passages. This should give a clue to
something. Andy

=== Andy Evans ===
Visit our Website:- http://www.artsandmedia.com
Audio, music and health pages and interesting links.

In article ,
Andy Evans wrote:
It can only have an effect if the transport is subjected to external
vibration sufficient to make it miss-track in some way.(DP)

Why not internal vibration? This is considerably larger than anything
external. As I've said, the effect of damping the motor vibrations by
fixing it to an alu slab is most audible in highly modulated passages.
This should give a clue to something.

The only clue it gives me is that you're endowing digital apparatus with
analogue symptoms.

--
*Despite the cost of living, have you noticed how it remains so popular?

Dave Plowman London SW
To e-mail, change noise into sound.

I have no wish to 'endow' (DP) anything. I'm reporting less distortion in
highly modulated passages when a transport is damped. So far I've had no
explanation. I don't mind if this is outside the subjective technical knowledge
of posters - our knowledge always has its limits.

=== Andy Evans ===
Visit our Website:- http://www.artsandmedia.com
Audio, music and health pages and interesting links.

Andy Evans wrote:

I have no wish to 'endow' (DP) anything. I'm reporting less distortion in
highly modulated passages when a transport is damped. So far I've had no
explanation. I don't mind if this is outside the subjective technical knowledge
of posters - our knowledge always has its limits.

You are using a cdrom drive and an external DAC?

How about a little experiment:

Fit it into a PC.
Copy an audio track as a .wav file with and without damping,
then repeat with your stereo system playing some heavy metal
turned up to 11.

Alternatively connect the digital output to a soundcard with
digital input.

I would be interested to find whether there was a bit of difference
between the files.

--
Eiron.

In article ,
Andy Evans wrote:
I have no wish to 'endow' (DP) anything. I'm reporting less distortion
in highly modulated passages when a transport is damped. So far I've had
no explanation. I don't mind if this is outside the subjective technical
knowledge of posters - our knowledge always has its limits.

Rather a patronising statement since it also assumes you've discovered
something the designers of the device didn't understand either.

You're reporting what you *think* you've heard. Until you can support it
with proper repeatable and verifiable results, it remains just that.

--
*Wrinkled was not one of the things I wanted to be when I grew up

Dave Plowman London SW
To e-mail, change noise into sound.

"Andy Evans" wrote in message

I could tell you how to easily do a representative set of
measurements(AK)

But evidently you can't explain an obviously audible phenomenon.

Andy, as long as you're doing such childishly simple, and devilishly flawed
listening evaluations, there's no assurance that there is in fact an audible
phenomenon.

How many ways have I already told you this?