9

Audio Controller Dialog 387
The maximum potential amplitude for an 8-bit file
is 128; for a 16-bit fi le, 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 produced by the controller.
Enable Real Time Device—Sets whether s ound is
captured from an external audio s ource. This
option is inactive if a sound capture device is not
installed in your system.
When on, an y 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 Time 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 Track 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 T hreshold of 1.0 drops all amplitude output
values to 0.0.
You can use low threshold values to filter out
background noise from the controller.
Oversampling—Smoothes the waveform. Multiple
samples are averaged to remove peaks 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 the
Track V iew 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 t he controller. The
fields you see vary by the type of parameter using
the Audio controller.
Float parameters are displayed in the Controller
Range group with Min. and Max. fields.
Vec tor par ameters (3 comp onents), such as
Transforms, display Base and Target g roups with
fields for X, Y, a nd Z va lues.
Base Scale—Defines the float value or X, Y, and Z
values returned for an amplitude of 0.0.
Target Scale—Defines the float value or X, Y, and Z
values returned for maximum amplitude.
Channel group
With this group you select which channel drives
the con troller output value. These options are only
available if you have chosen a s tereo sound file.
Lef t —Us es the left channel amplitude.
Right—Uses the right channel amplitude.
Mix—Combines the two channels so that the
returned amplitude is the g reater value of either
channel.