Situations where sample rate needs to be converted |
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For editing audio to use with digital video |
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Most of AVI files created by capturing digital video via DV port (such as IEEE 1394 port) are sampled at the rate between 32,000 Hz and 48,000 Hz. Since the CD audio is sampled at 44,100 Hz, if you want to import the data from CD Audio and use it as BGM of a movie file, you will need to covert the sample rate.
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For authoring CD Audio with audio data recorded from DAT |
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In general, audio data is recorded on DAT at 48,000 Hz.
In order to create CD Audio with the audio data digitally acquired from DAT, you will need to change the sample rate of DAT data to 44,1000 Hz. |
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>Situations where bit depth needs to be converted |
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For smaller sound files |
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When you produce CD-ROM contents, music to be used with the game software, or sounds to be streamed over the Internet, you may want to make the sound files as compact as possible so that waveform data can be stored in the limited disk space. In such situations, you can effectively reduce the size of the sound file by lowering the bit depth. |
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Converting sample rate or bit depth does not improve the sound quality higher than original sound. For example, converting the sample rate from 22,050 Hz to 44,100 Hz does not improve the quality of the original sound data.
Supported sample rates at recording or playback vary by the sound devices (such as sound board/audio board and sound processor) you are using.
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