On Thu, 16 Mar 2006 09:10:30 +0000, Glenn Richards
wrote:

Don Pearce wrote:

I ask a serious question, expecting some sensible responses, and
instead all I get are sarcastic comments.
No, you were trolling.

No, I was asking a serious question.

As reducing the noise floor (by whatever means) improves dynamics.
And this I have tested, I've recently been involved in cleaning up
some recordings made about 25 years ago on analogue equipment. This
process involves re-EQ followed by digital noise reduction, and the
results before and after applying the noise reduction are nothing
short of dramatic.
Cleaning up recordings most certainly does *not* involve eq. That
would be changing recordings.

By "cleaning up" I was referring specifically to applying digital noise
reduction. The re-EQ was mentioned simply for completeness, as the
recordings were a bit bass-shy and lacking in sparkle. So a touch of
smiley EQ solves that, followed by noise reduction.

It's rather vital that you EQ before NR though, otherwise the re-EQ
boosts bits that the NR has cut, leading to some interesting pumping
effects...

Read above - you can filter the mains til you turn blue and you won't
change your noise floor by even a milli dB.

On an average setup in an average domestic residence I'm sure that's the
case. Unfortunately I have a dozen or so PCs, all with switching power
supplies, sat in the next room, spewing RF onto the ring main. Which in
theory could be affecting the sound... at least in theory.

Turn your amplifier on, with no music playing and listen. Leave the
volume control in the normal listening position and sit in your
listening chair. What can you hear? Anything? Of course not. And what
little hiss there is comes from the front end of the amplifier. None
of it comes from the mains.

You can't hear much above 20kHz. But signals at frequencies above this
will affect what you do hear, harmonics, interaction etc. Why do you
think there's been so much work done on DVD-A, SACD etc, using sample
rates of 96kHz or even 192kHz, rather than 44.1?

Good old Russ Andrews - he has successfully conned £250 out of you.

Read my earlier postings. Currently I'm just using a standard IEC cable,
running into a surge protected (not even an RFI filtered) 4-way strip.
Surge protected for obvious reasons... I don't want a rogue power spike
frying 2 grand's worth of kit.

Now wise up and stop waving your stupidity like a flag of honour.

You are Stewart Pinkerton and I claim my five pounds.

That is the end of that then. You are not an engineer - you have never
been an engineer and you can never be an engineer.

So for goodness sake stop posting stuff that is trying to sound like
engineering when it is in fact unmitigated balls. I already told you,
it is no longer funny. Stick to whatever it is you know about.

d

Pearce Consulting
http://www.pearce.uk.com