8

Audio Controller Dialog 369
Absolute Value—
Controls the interpretation of
sound amplitude. The value returned by the
Audio cont roller is sample amplitude divided by
maximum amplitude.
Value=(sample amp.)/(maximum amp.)
When A bsolute Value is turned on, the maximum
amplitude equals the maximum sampled
amplitude from the waveform. This ensures that
potential for the output value reaches the target
value.
When off, the maximum amplitude equals the
maximum potent ial amplitude of the waveform.
Output reaches the ta rget va lue only if the
waveform reaches its maximum potential
amplitude.
The maximum potential amplitude for an 8-bit file
is 128; for a 16-bit file, it’s 32768.
Real Time Control group
Use this group to create interactive animation
that’s driven by sound captured from an external
audio source, such as a microphone. Use these
options only for interactive presentations.
Youcan’tsavethereal-timesoundorsavethe
animation pr oduced by the con troller.
Enable R eal Time Device—Sets whether sound is
captured from an external audio source. This
option is inactive if a sound capture device is not
installed in your system.
When on, any selected audio file is ignored, and
the controller uses sound captured by the selected
device.
When off, the controller uses the selected audio
file.
Real T ime device list—Displays all available
real-time sound devices installed in your system.
Selectthedeviceyouwanttouseforrealtime
sound capture.
Sample group
This group contains controls to filter out
background noise, smooth out the waveform, and
control display in Tr ack View.
Threshold—Sets the bottom cut-out level as a
percentage of total amplitude. Any amplitude
below the threshold drops to 0.0.
Threshold range is from 0.0 to 1.0.
A Threshold of 0.0 has no effect on amplitude
output values.
A Threshold of 1.0 drops all amplitude output
values to 0.0.
Yo u c a n u s e l o w t h r e s h o l d v a l u e s t o f i l t e r o u t
background noise from the controller.
Oversampling—Smoothes the waveform. Mu ltiple
samples are averaged to remove pea ks and valleys.
Ente r a number in the Oversampling field to
calculate the average
Fast Track View—Controls the display of
oversampling.
When turned on, oversampling is ignored for the
Track View display.
When tur ned off, oversampling is applied to t he
Track View display. High oversampling values can
slow the display of the waveform.
Base & Target Scale groups
Here you enter minimum and maximum
parameter values returned by the controller. The
fields you see vary by the type of parameter using
the Audio controller.
Float p arameters are displayed in the Controller
Range group with Min. and Max. fields.
Vector parameters (3 components), such as
Transforms, display Base and Target groups with
fields for X, Y, and Z values.