I was taught that RT-60 is
the Time it takes for early sound reflections off of walls, to drop
60-dB. R-as in reflection, T-as in time, and 60-as in dB. Was I mis-informed
or am I not reading this right?
example:
If I have an 102-dB signal's initial transient, and it takes 25ms (typical in
surround stereo system's "large hall" settings) to drop 60-dB (to 42-dB) for
the early
reflection,
then isn't
my RT-60 = 25ms?
I'll look at
John Backus' book again, I think it's in my car.
Anyway, I'll
check back on that. Later dudes and dudettes.
Partev :-) [from
Encino]
---
Michael Rempel <michael_rempel@shaw.ca> wrote:
From: Michael
Rempel <michael_rempel@shaw.ca>
Date: Fri, 02 Sep 2005 15:52:45
-0700
To: csound@lists.bath.ac.uk
Subject: Re: [Csnd] Conversion into 48
khz and 24 bit, does it make sense?
Re consumer audio, CD is 44.1, but
DVD and other formats use the better 48
frequency. I think you will find
effects with long tails are a bit less
metalic/harsh in 48. However mic
and preamp selection if it is recorded will
have a much more profound
impact.
To further explain a bit,it is not clear what benefit you
would get from
adding bits, however dynamic range is improved in 24. If
your effects are
very thick you might see some slight difference in the
tails as the decay
runs out to silence. That is what RT60 means, generaly
60db below the
ambient level of the source is considered silent for most
stuff, be it
physical or electronic.
Further more, in general your
best result in the end will reflect the
quality of your worst step in the
creation process. This does not mean it
needs to be clean or distortion
free or commercial. Rather it means that
everything matters. What sounds
good is the only deciding factor for
anything. So the answer is, and
always will be .... try it!
Michael
-----Original Message-----
From: Max McDougall [mailto:max@realisticom.com]
Sent: Friday,
September 02, 2005 11:22 AM
To: csound@lists.bath.ac.uk
Subject: Re:
[Csnd] Conversion into 48 khz and 24 bit, does it make
sense?
First of all, a jump to 48 will not have a noticeable effect on
the
sound. Also- going to 24 bit is only going to effect the dynamics so
unless the rt60 of the verbs are dynamically important its not really
worth the extra storage. Keep in mind that consumer formats (cds, etc)
are 44.1/16bit so if you are going to burn to disc you will need to
dither it down anyway.
peace,
Math Static
On
Sep 1, 2005, at 11:45 AM, Jan Jacob Hofmann wrote:
> Dear list,
>
> I am planing to do a major remix of my pieces. They consist
of
> soundfiles originally recorded at a sample-rate of 44,1 khz at 16
bit.
> I wonder if there would be an increase of sound-quality if I
converted
> these files into 48 khz and 24 bit beforehand. I know the
files
> themselves would surely not sound better themselves, but as
> reverberation and early reflections are added in the course of he
mix,
> aswell as the amplitude of these files is altered, I guess doing
it in
> 48 khz and 24 bit might be an advantage: the higher sample-rate
would
> give a better temporal resolution (important for the early
> reflections) and the higher bit-rate more definition and a higher
> headroom for the amplitude level. What do other Csounders think? Do
my
> thoughts on this make sense?
>
> Best regards,
>
> Jan Jacob
>
>
> sound | movement |
object |
> space
> sonic architecture | site:
http://www.sonicarchitecture.de
> spatial electronic composition | 2nd
order ambisonic music
>
> -- Send bugs reports to this list.
> To unsubscribe, send email to csound-unsubscribe@lists.bath.ac.uk
>
>
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