Apple Final Cut Express HD - Manual (Page 1004)

1004 Part XII Output
 Rate: Choose a standard sample rate from the pop-up menu or enter a value to
specify the output rate for the audio. Lower sample rates take less bandwidth but
have lower quality.
 8-22.225 kHz: These lower sample rates are used mainly for multimedia and web
movies to reduce file size.
 32 kHz: A lower-quality sample rate often used on consumer DV camcorders. This
option isn’t particularly useful for exporting unless you specifically need to make a
file that is compatible with a 32 kHz device.
 44.1 kHz: This is the sample rate of music CDs.
 48 kHz: Most digital video formats use this sample rate.
 96 kHz: This sample rate is used mostly by high-end digital audio workstations.
 Show Advanced Settings: Click here to set additional options, if the selected audio
format supports this.
 Sample Rate Converter Settings: If your sequence or clip sample rate doesn’t match your
export sample rate, this pop-up menu appears. You can choose from several qualities.
Linear PCM Settings
These options are only available when you choose Linear PCM in the Audio format
pop-up menu.
 Sample size: Choose a bit depth for your audio samples. For most situations, 16-bit
audio is the minimum bit depth you should choose, but sometimes 8-bit audio is
useful when creating small, low-quality movies for the web. If you choose 32-bit, you
have the option of using integer or floating point values. You can also choose 64-bit,
but only if the floating point option is selected.
 Little endian: This refers to the way audio data bytes are ordered. Little endian byte
ordering is used when creating Windows-compatible WAVE files. Big endian order
is used when creating AIFF files.
 Floating point: This option affects how the bits of each sample are used to
represent audio amplitudes. Floating point is available with 32-bit audio, and
required when using 64-bit audio.
 Unsigned: This option is automatically enabled when exporting 8-bit WAVE files.
Prepare for Internet Streaming
If you’re outputting QuickTime files for streaming over the Internet, there are three
format options.