Hi Andre,
concerning podcasts. Andrew Downie, who's on this list has a short
introduction, and this includes selecting audio:
https://www.sendspace.com/pro/dl/v56cn4
In addition, Jim Gammage is doing a series on Audacity at Talking Computers:
http://www.talking-computers.org.uk/jimonaudacity.html
Note that there are some more recent articles by Jim, but they don't seem
to have been added to this page.
I gave a general idea about how to you might go about removing hiss in a
previous post, and I'll include them again hear. They may make more sense
after you've listened to some of the podasts.
To remove the hiss from a the audio in a track in Audacity.
The track needs to be selected, which it is by default when you open or
import a file.
You first need to select a time range which covers a section of the audio
where there is only hiss, and no speech or music or whatever.
As an example, I'll assume that there is a section at the start of the
audio. You could select a time range by:
1. Start playback.
2. Press the X key to stop playback and position the cursor at the time
when you pressed the key. You would need to press the X key whilst there
was still only hiss.
3. Press shift + J to select a time range from the start of the track to
the cursor position.
Now you can open the Noise reduction effect, which is on the Effect menu. A
get noise profile button is the initial focus. Press it, and the dialog
closes.
Next, select a time range which covers all the audio in the track. You can
do this by pressing J to move the cursor to the start of the audio, and
then Shift + K to select from the start to the end of the audio.
Open the Noise reduction effect again. The dialog contains a number of
parameters which you can change, but you could just try using the defaults,
and simply press the OK button.
You can then play the audio and see how well the hiss has been removed.
If a suitable section of audio which just contains hiss is not at the start
of the audio, and you need help selecting it, just let us know.
David.
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