Lenco L-174 Manual Del Usuario página 20

doesn't take any audio as input will automatically be placed in the
Generate menu.
Effect Menu
The items in this menu only work when you have audio selected. Audacity
does not have any real-time effects; you must select the audio, apply the
effect, and then listen to the results.
Most effects have a Preview button. Clicking on this button plays up to
three seconds of audio, allowing you to hear what it will sound like after the
effect is applied. This is useful for fine-tuning the effect parameters.
Repeat Last Effect - selecting this command is a shortcut to applying the
most recent effect with the same settings. This is a convenient way to
quickly apply the same effect to many different parts of a file.
Amplify - changes the volume of the selected audio. If you click the "Allow
clipping" checkbox, it will let you amplify so much that the audio ends up
beyond the range of the waveform, and is clipped (distorted). The default
value when you open the effect is to amplify so that the loudest part of the
selection is as loud as possible without distortion.
Bass Boost - enhances the bass frequencies in the audio.
Change Pitch - changes the pitch/frequency of the selected audio without
changing the tempo. When you open the dialog, the starting frequency is
set to Audacity's best guess as to the frequency of the selection. This
works well for recordings of singing or musical instruments without
background noise. You can specify the pitch change in one of four different
ways: musical note, semitones, frequency, or percent change.
Change Speed - changes the speed of the audio by resampling. Making
the speed higher will also increase the pitch, and vice versa. This will
change the length of the selection.
Change Tempo - changes the tempo (speed) of the audio without
changing the pitch. This will change the length of the selection.
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