Adding a sound track
to your animation allows you to synchronize animation to sound.
Add a sound track to lip-sync a character speaking, for example.
Audio File group
Use this group to add
and remove sound files from the controller, and to adjust amplitude.
- Choose Sound
Displays a standard file selector
dialog. You can choose WAV and AVI files.
- Remove Sound
Removes any sound file associated
with a controller.
- Absolute Value
Controls the interpretation
of sound amplitude. The value returned by the Audio controller is
sample amplitude divided by maximum amplitude.
Value=(sample amp.)/(maximum amp.)
When Absolute 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 potential amplitude of the waveform.
Output reaches the target value 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. You can't save the real-time sound or save the animation
produced by the controller.
- Enable Real 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 Time device list
Displays all available real-time
sound devices installed in your system. Select the device you want
to use for real time sound capture.
This group contains controls
to filter out background noise, smooth out the waveform, and control
display in Track View.
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.
You can use low threshold
values to filter out background noise from the controller.
Smoothes the waveform. Multiple
samples are averaged to remove peaks and valleys. Enter a number
in the Oversampling field to calculate the average
- Fast Track View
Controls the display
When turned on, oversampling
is ignored for the Track View display.
When turned off, oversampling
is applied to the Track View display. High oversampling values can
slow the display of the waveform.
Base & Target Scale
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 parameters 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.
- 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.
With this group you select
which channel drives the controller output value. These options
are only available if you have chosen a stereo sound file.
Uses the left channel amplitude.
Uses the right channel amplitude.
Combines the two channels
so that the returned amplitude is the greater value of either channel.