You can only use sound files that have the same sampling rate. If you have already added a sound file sampled at one rate, you cannot add files that were sampled at other rates.
You can add audio files to your scenes using the animation mixer. This allows you to adjust the timing of your animations by using the sound as a reference. For example, you can use an audio file as reference for lip synching with a shape-animated face, or sync up some special effect noise with an animation. Or you could load an audio file to do some previsualization or storyboarding as you’re experimenting with your animation project.
Sound files are added as audio clips on tracks in the animation mixer, the same way you can load action and shape sources as clips on tracks.
For more information about using clips in the animation mixer in general, see The Animation Mixer.
The following sound file formats are supported:
• *.aiff/.aif: Audio Interchange File Format
• *.aifc: Audio Interchange Format - Compressed
• *.avi: Audio Video Interleave
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You can only use sound files that have the same sampling rate. If you have already added a sound file sampled at one rate, you cannot add files that were sampled at other rates. |
Notes on Audio Compression Methods
Audio files can be formatted in particular ways. WAV files allow for different compression methods to be used within them: for example, MPEG-3 compression does not mean MPEG-3 audio files.
XSI supports WAV files that use MPEG-3 compression, but it does not support MPEG-3 (MP3) audio files. As well, XSI does not support MPEG-1 compression or audio files having more than two channels or high-sample resolutions. This is because they use a different format than standard WAV compression methods and need to be treated specially.
Normally, WAV files use Pulse Code Modulation (PCM) as the compression scheme, but there are a variety of schemes that can be used. If you look at the File > Properties dialog box of the Windows’ Sound Recorder application, you can see the different conversion schemes that can be used.
Additionally, an audio file that uses an irregular sample rate may fail play. Usual sample rates are 8 kHz, 11.025 kHz, 12 kHz, 16 kHz, 22.050 kHz, 24 kHz, 32 kHz, 44.1 kHz and 48 kHz. In the event of an unsupported sample rate, an error message appears.
SOFTIMAGE|XSI v.7.0