Audio

Record audio along with video.

Audio Capture Device:

the device for recording audio. To adjust the input line and volume, and so on, click the 'Volume' button.

Recording Format:

the format your sound card use to record sound from microphone, videotape, internet, etc.

Compressed Format:

the encoder of the audio part of the avi file. To choose the desired compressor, click the 'Setup...' button.
Interleave Audio and Video:

Interleave Audio and Video: Interleave your audio and video for smoother playback on a slow device such as CD-ROM. This will also allow better synchronization of your video and sound content. The interleave factor determines the amount of interleaving in your movie. Normally, this value is specified in number of frames. A value of 1 frame will mean full interleave. Larger values will mean less interleaving.

You can also specify the Interleave factor in milliseconds. If you choose to Interleave a movie every 100ms for a movie with a capture rate of 200 frames per second (Capture Frames Every 5 milliseconds), the Interleave factor will be equivalent to Interleave every 20 frames.