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freqtweak



SYNOPSIS

       freqtweak [-h] [ -c <num> ] [ -i <str> ] [ -o <str> ] [ -n
       <str> ] [ -D <str> ] [ -p <str> ] [ -r <str> ]


DESCRIPTION

       freqtweak  is a graphical tool for realtime audio spectral
       manipulation and display. It provides  several  algorithms
       for  processing  audio  data in the frequency domain and a
       highly interactive GUI to manipulate each associated  fil­
       ter. It also provides high-resolution spectral displays in
       the form of scrolling-raster spectrograms  and  energy  vs
       frequency  plots  displaying  both  pre and post-processed
       spectra.


MOUSE CONTROL

       The processing filters are controlled through mouse opera­
       tions  on  each filter GUI window. The possible operations
       are:

       Left button click/drag to  draw  filters.  If  Control  is
       down,  the y-axis is fixed at the last cursor location (to
       draw nice horizontal lines).  If Control and Alt are  down
       you can draw nice arbitrary straight lines.

       Right  button  drag  to move filters around in space.  The
       filters wrap around the left/right edges unless  you  hold
       down  Control.   Dragging with both left and right buttons
       down on the GUI for the Gate processor moves both the pri­
       mary and the alternate filter together.

       Holding  Shift  modifies  the  alternate filter (on double
       filter graphs like Gate) for the previous operations.

       Middle-button pops up frequency axis menu.

       Ctrl-Alt right-click resets a filter to default values.

       Shift-Ctrl-Alt left-drag zooms in on the y axis.  Look  at
       the status bar to see the values for the cursor itself and
       the values of the filter at the cursor's frequency.

       Shift-Ctrl-Alt right-click release resets  the  Y-zoom  to
       full.

       The  B  and  BA buttons mean Bypass and Bypass All respec­
       tively.

       The L and LA buttons mean Link and Link All  respectively.

       The G and GS buttons mean Toggle Grid and Toggle Grid Snap
       respectively.

              ture_1,...'

       -o <str>, --outputs=<str>
              Connect outputs to these jack ports (separate  each
              channel  with commas).  Defaults to 'alsa_pcm:play­
              back_1,...'

       -n <str>, --jack-name=<str>
              Jack name. Default is freqtweak_1.

       -D <str>, --tmpdir=<str>
              Jack  server  tmp  directory  (should  match  jackd
              --tmpdir).

       -p <str>, --preset=<str>
              Load the given preset initially.

       -r <str>, --rc-dir=<str>
              Specifies  what  directory  to  use for run-control
              state. Default is ~/.freqtweak.


EXAMPLES

       Here is an example of using freqtweak with  an  alsaplayer
       feeding  it  and output going to speakers (alsa_pcm:out_?)
       without using a JACK patchbay:

       Start freqtweak first with this command line:

       freqtweak -n ft &

       Then start alsaplayer like so:

       alsaplayer -o jack -d ft:in_1,ft:in_2 &


SEE ALSO

       jackd(1), jack_connect(1), jack_lsp(1)


AUTHOR

       Freqtweak was written and is maintained by Jesse  Chappell
       <jesse@essej.net>.

       This  manual  page was created by Enrique Robledo Arnuncio
       <era@debian.org> for the Debian  GNU/Linux  system,  using
       text from the README file by Jesse Chappell.

                        February 11, 2003            FREQTWEAK(1)

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