The loudest value (in your case at beat one of measure three) is 0 dB
= 1.0 linearly or 100%.
The fade starts at minus 100 dB = 0.00001 linearly or 0.001 %.
To normalize a sound, we have to add a dB value such that we have 0 dB
eventually.
100 dB is just a big multiplication factor when translated into
percent: it would be 10000000 %.
However, adjustable fade doesn't allow such a big number in percent,
only 1000 % which is equal to 20 dB amplification.
Note: this high amplification is only for the beginning (or end for
fade-outs) and it will get smaller and smaller until 0 dB =
multiplication with 1.
Some values:
-40 dB = 1 %
-20 dB = 10 %
0 dB = 100 %
6 dB = 200 %
20 dB = 1000 %
26 dB = 2000 %
40 dB = 10000 %
and so on.
In summary:
0 dB means, don't amplify and 100 dB means amplify a lot.
It may be that the audio will sound a bit noisy after reversing the
fade. This is because the dynamic range or signal to noise ratio
(distance between noise and valuable sound) is very low at those -100
dB.
However, this extraneous amplification is very short and shouldn't
matter too much.
Robert
On 07/08/2017, Annabelle Susan Morison <foristnights@xxxxxxxxxxx> wrote:
For a fade-in? So you're saying that 100 DB is the loudest level, then when
the fade in ends, it goes silent? I'm confused on that one!
-----Original Message-----
From: audacity4blind-bounce@xxxxxxxxxxxxx
[mailto:audacity4blind-bounce@xxxxxxxxxxxxx] On Behalf Of Robert Hänggi
Sent: Monday, August 07, 2017 1:25 PM
To: audacity4blind@xxxxxxxxxxxxx
Subject: [audacity4blind] Re: Working With Fades
On 07/08/2017, Annabelle Susan Morison <foristnights@xxxxxxxxxxx> wrote:
So for example, I have a fade in that starts at the beginning of theIn this case, you have to set the start in "Adjustable Fade" to 100 dB
song,
and
ends right at the beginning of measure 3.
and the end to 0.
Robert
-----Original Message-----
From: audacity4blind-bounce@xxxxxxxxxxxxx
[mailto:audacity4blind-bounce@xxxxxxxxxxxxx] On Behalf Of Robert Hänggi
Sent: Monday, August 07, 2017 8:31 AM
To: audacity4blind@xxxxxxxxxxxxx
Subject: [audacity4blind] Re: Working With Fades
That's tricky.
Do you roughly know where the fade starts and ends?
I would use adjustable fade to reverse the fades.
If it is a Fade-out:
Select the portion that you want to correct.
Open "Adjustable Fade"
Select "Fade Up"
Switch to dB (instead of percent)
Mid amplification: 0
Start (= initial amplification): 0 dB
End (=final amplification): 20 dB
Preview the result.
It has presumably still a fade out.
Adjust the final Amplification accordingly.
The maximum is 100 dB.
If the start and end sounds roughly the same but the middle drops or is
louder:
change the "Mid-Fade Adjust" percentage.
It may be that you have to apply the effect multiple times.
You could also try the compressor but it is probably a bit difficult
to find the right settings.
First, check the peak of the selection (amplify effect).
Copy the value displayed (control+c) and apply the amplification.
Compressor:
Start with all sliders set to 0
the ratio on the other hand should be about 100 %.
Check "Makeup Gain" and "Based on Peaks"
OK.
Open amplify again
Paste the copied amplification value and put a minus in front of it
(home, followed by -).
Apply.
If you're unlucky, the peak is not quite the same and you have to
adjust manually.
Robert
On 07/08/2017, Annabelle Susan Morison <foristnights@xxxxxxxxxxx> wrote:
Hi, it's Annabelle.
If I have a mixdown of a recording, and it contains fades, is there a
way
that Audacity can essentially delete those fades, returning the whole
recording to its loudest volume level? Better yet, is Audacity able to
do
this without ruining the recording? Is there a JAWS script for Audacity
that
focuses on the Spectragram?
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