Hi Marlon
This is a somewhat rambling reply, so trust it does not do more to confuse than
to enlighten. Before dealing with your specific questions, my suggestion is to
back off your levels to avoid, so far as possible, clipping. With modern
equipment it is usually safe to record at somewhere around minus 15 and boost
the level later. Back in the days of tape recorders and even with some nasty
sound cards, recording down there can introduce hiss. However, that is less of
a concern most of the time these days.
But to the use of Find Clipping under the Analyse Menu. You will notice that
you can choose how many samples to use at the start and end of the clipped
material. Someone with more knowledge can comment on playing with the setting,
but I leave them both at the default. The important thing to know is that the
label will (if I understand correctly) cover only the clipped portion. That is
why you only hear a very short sound when you select a label and press play.
If you press left arrow you will clear the selection and you will then hear the
whole offending word, door slam or whatever. What you do next will depend on
what you discover. If it is an unwanted sound like a cough or other background
sound, I would select it and delete it. If it is a word that you want to keep,
select it and drop the level. Exactly what you do will depend on the severity
of the clipping. If distortion is obvious, reducing the level may well not fix
the problem, which is why it is best to avoid clipping in the first place.
Regarding deleting labelled audio, the manual says quite a lot about that. It
is possible to delete just the label or the audio and the label. In summary,
if you - say - select a section of audio associated with a label by using
alt-left or right arrow, pressing Delete will remove the label and the audio.
Material to the right, together with associated labels will shuffle along to
fill the space.
Having found clipped material, I would generally not use the associated labels
for deleting. As mentioned earlier, the label will usually not cover all of
the material you want to adjust.
Andrew
-----Original Message-----
From: audacity4blind-bounce@xxxxxxxxxxxxx <audacity4blind-bounce@xxxxxxxxxxxxx>
On Behalf Of Marlon Brandão de Sousa
Sent: Sunday, 25 November 2018 11:25 PM
To: audacity4blind@xxxxxxxxxxxxx
Subject: [audacity4blind] Find clippings
Hello,
I have been experimenting with the find clipping feature.
What I found is that it will place a label on each peak it finds, and by peak I
assume moments where sound will go above 0 db.
As I am doing mostly voice recordings, I often hear very short sounds
like tack when I go to one of the generated labels and play it.
Question though is this: and now what should I do?
Ideally I want to force only the peaks, not the rest of the sound, below
a given level, as if I squashed only those clippings below 0 but let the
rest of the sound as is.
Other times, I want to delete those tack sounds. This imposes another
question:
Is the label pointing to the beginning of the peak? To the end of the
peak? To a selection containing the peak? If I delete the peak, will the
label also go away? Are other labels still in sync after the deletion?
The thing is I am still unsure of how labels relate to sound and to
sound selection.
Thanks,
Marlon
The audacity4blind web site is at
//www.freelists.org/webpage/audacity4blind
Subscribe and unsubscribe information, message archives,
Audacity keyboard commands, and more...
To unsubscribe from audacity4blind, send an email to
audacity4blind-request@xxxxxxxxxxxxx
with subject line
unsubscribe
The audacity4blind web site is at
//www.freelists.org/webpage/audacity4blind
Subscribe and unsubscribe information, message archives,
Audacity keyboard commands, and more...
To unsubscribe from audacity4blind, send an email to
audacity4blind-request@xxxxxxxxxxxxx
with subject line
unsubscribe
