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An integral part of every video is the soundtrack. To use audio in DVP
effectively, you need to understand these concepts:
Channels The number of output devices (such as speakers) to which sound
can be directed. Mono plays the same audio through both channels, while
stereo has two separate channels. Typically on the computer, stereo is
only used for high-fidelity music applications.
Sample size The amount of data in each sample of audio. Most desktop applications
use 8-bit sampling; 16-bit sampling is equivalent to CD-quality sound.
Sample rate The number of audio samples per second, expressed in kilohertz
(kHz). The higher the sample rate, the better the sound quality (and the
more memory required). DVP works with audio files sampled at 11.025kHz,
22.05kHz, and 44.1kHz.
Higher-quality audio is not always your best choice. For example, an
audio track that is 44.1kHz, 16-bit stereo requires 16 times the space
of the same audio sampled at 11.025kHz, 8-bit mono. Because the amount
of data in an audio stream can drastically reduce the playback performance
of the video, you should always use the lowest acceptable quality for
audio. Use the following general rules to begin with, but always test
to be sure you achieve the quality you want:
For sound effects, choose 11.025kHz 8-bit mono.
For voiceovers, choose 22.05kHz 8-bit mono.
For music, choose 44.1kHz 8-bit stere
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