Re: [ARSCLIST] 2GB limit for audio file formats

[Eric Jacobs <ericj@xxxxxxxxxxxxxxxxxxx>]

Impulse noise has much higher frequency harmonics than the audio
signal - these harmonics are not audible.  However, DSP algorithms
can more clearly distinguish between noise and signal when these
higher frequency harmonics are present, and then more cleanly
remove the noise without affecting the signal.

I'm talking about impulse noise generated by mechanical damage
(scratches, gouges, cracks) and contamination to the audio carrier.

I'm NOT talking about impulse noises that were part of the
acoustic environment when the recording was made, noises that
might have been picked up by a microphone.

Eric Jacobs
The Audio Archive


-----Original Message-----
From: Association for Recorded Sound Discussion List
[mailto:ARSCLIST@xxxxxxx]On Behalf Of Goran Finnberg
Sent: Saturday, June 25, 2005 4:19 AM
To: ARSCLIST@xxxxxxxxxxxx
Subject: Re: [ARSCLIST] 2GB limit for audio file formats


I wrote:

> Also a greater sampling frequency doeas not make a more detailed
> recording.

The physological rise time of the ear is of the order of 250 µS.

So anything faster than that isn´t distinguised by any audible change to
the perceived sound.

This has been stated by a nuber of researches from the past and also by
Stephan Peus head of research at Neumann GmbH.

So 20 kHz cutoff is fine for precision audio.

Or a Neumann KM84 which within its bandwith, 20 kHz, displays near
perfect reproduction......:-)

--
Best,

Goran Finnberg
The Mastering Room AB
Goteborg
Sweden

E-mail: mastering@xxxxxxxxx

Learn from the mistakes of others, you can never live long enough to
make them all yourself.    -   John Luther