[Audacity-nyquist] Corrected version of panorbit.ny

[David R. S. <dav...@sh...>]

* panorbit.ny: Orbit panning
(corrected version, attached)

Makes your stereo audio sound like it's in orbit around (circling)
something. Pan, tremolo, lowpass filter and pitch modulation are
controlled by an LFO. Does not work on mono audio.

Variables:

1. LFO frequency - the rate of a low frequency oscillator
generating a sine wave below 20hz.

2. LFO starting phase - Either -90 or +90 degrees, for best
illusion of your stereo audio orbiting something.

3 & 4. left-most and right-most pan positions - Either of which
can be set anywhere from 0 (left) to 5 (center) to 10 (right), for
the panning sweep.

5. Tremolo wetness - Set at zero, there is no change in volume
during the LFO sweep. Set to 100 percent, the volume will sweep,
like in a tremolo, from full volume to zero and back.

6. Lowest lowpass filter cutoff frequency - To further enhance the
illusion of orbiting, the low volume corresponds to a drop in the
cutoff frequency of a lowpass filter. The highest volume
corresponds to an increase in the cutoff frequency of the lowpass
filter.

7. Pitch modulation depth - Similar to how you can hear the pitch
of a car increase as it approaches you and drop as it moves away
from you, the pitch of your audio can be modulated. This variable
controls how deeply you want the pitch modulated.

panorbit.ny is also posted at

http://www.shellworld.net/~davidsky/panorbit.htm

Written by David R. Sky, January 12, 2006.
Released under terms of the GNU Public License
http://www.opensource.org/licenses/gpl-license.php