Run fische with the -h or --help flags to see basic help notes.

Usage: fische [-d (device)] [-g (X)x(Y)] [-v (X)x(Y)] [-f] [-s (fps)] [-1] [-h]

Details:
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-d --device (device)        (device) names the alsa pcm capture device to get
                            the sound data from. On most systems, the default
                            will do just fine.
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-g --geometry (X)x(Y)       (X) and (Y) specify the width and height of the
                            animation. default: 800x400
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-v --virtual (X)x(Y)        (X) and (Y) specify the width and height of the
                            application window. Use this to prevent your
                            computer from trying to switch to non-existent
                            fullscreen resolutions.
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-f --fullscreen             Start up in fullscreen mode. At runtime, you can
                            toggle fullscreen mode by pressing 'F'.
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-s --fps (fps)              (fps) specifies the target frames per second.
                            The default, 30, is what fische is designed for
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-1 --single                 Use only one CPU, even if there are more available
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-h --help                   This message.
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At runtime, press 'P' to pause, 'F' to toggle fullscreen mode and 'ESC' to quit.

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TROUBLESHOOTING
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***** if you get this error:
      X Error of failed request:  BadValue (integer parameter out of range for
      operation)
----- try to start fische with the -v or --virtual flags and set X/Y to values
      that correspond to a fullscreen resolution that you know exists.
      for example: fische -g 1400x700 -v 1400x1050
