20
Repeat
- repeats the selection a
certain number of times. This
operation is quite fast and space-
efficient, so it is practical to use it to
create nearly-infinite loops.
Reverse
- This effect reverses the
selected audio temporally; after the
effect the end of the audio will be
heard first and the beginning last.
Wahwah
- uses a moving bandpass
filter to create its sound. A low
frequency oscillator (LFO) is used
to control the movement of the filter
throughout the frequency spectrum.
Adjusts the phase of the left and
right channels when given a stereo
selection, so that the effect seems
to travel across the speakers.
Plugins 1 to 15 ...
etc. These
submenus contain any VST,
Ladspa, or Nyquist plug-ins loaded
by audacity. It is possible for a
poorly written plug-in to crash
Audacity, so always save your work
before using a plug-in effect.
Analyze Menu
Plot Spectrum
- To use this feature,
first select a region of audio from a
single track, then select "Plot
Spectrum". It opens up a window
that displays the Power Spectrum of
the audio over that region,
calculated using the Fast Fourier
Transform. The graph represents
how much energy is in each
frequency. As you move the mouse
over the display, it shows you the
nearest peak frequency. This
window can also display other
common functions that are
calculated using the Fast Fourier
Transform, including three versions
of the Autocorrelation function. The
Enhanced Autocorrelation function
is very good at identifying the pitch
of a note.
The Analyze menu is intended for
effects and plug-in effects that do
not modify the audio, but simply
open a dialog with some descriptive
information. Audacity also supports
Analyze commands that create
annotations in a Label Track.
Help Menu
About Audacity
- displays the
version number and credits. If you
compiled Audacity yourself, check
here to verify which optional
modules were successfully
compiled in.
Contents ...
- opens this reference
guide in a searchable form.
