Adobe 25520388 - Premiere Pro - PC Using Manual page 76

USING ADOBE PREMIERE PRO
Importing, transferring, capturing, and digitizing
Using audio from Adobe Soundbooth
You can use Adobe® Soundbooth™ to perform advanced audio editing. If you export the audio from Adobe
Soundbooth to an audio file format compatible with Premiere Pro, you can import the audio into Premiere Pro
projects.
Audio sample rates supported
Premiere Pro natively supports these audio sample rates:
• 8000 Hz
• 11025 Hz
• 22050 Hz
• 32000 Hz
• 44100 Hz
• 48000 Hz
• 96000 Hz
Conforming audio
Premiere Pro processes each audio channel, including audio channels in video clips, as 32-bit floating-point data at the
sequence sample rate. This processing assures maximum editing performance and audio quality. Premiere Pro
conforms certain types of audio to match the 32-bit format and the sequence sample rate. If conforming is required, it
is done when a file is imported into a project for the first time. Conforming takes some time and disk space. A progress
bar appears at the lower right of the Premiere Pro window when conforming begins. Premiere Pro saves conformed
audio in CFA audio preview files. You can determine where to save these audio preview files by specifying a Scratch
Disk location for Audio Previews in the Project Settings dialog box.
You can work with audio files, even applying effects to them, before they are fully conformed. However, you can
preview only the parts of the files that have been conformed. You cannot hear unconformed sections on playback.
These rules determine which types of audio get conformed:
Uncompressed audio
• Premiere Pro does not conform audio in uncompressed clips that were recorded in one of the natively supported
sample rates, when you use these clips in sequences with matching sample rates.
• Premiere Pro does conform audio in uncompressed clips when you use them in sequences with non-matching
sample rates. However no conforming is done until you export the sequences or create audio preview files.
• Premiere Pro does conform audio in uncompressed formats that were not recorded in a natively supported sample
rate. In most of these cases, it will upsample the audio either to the nearest supported sample rate, or to a supported
sample rate that is an even multiple of the source audio sample rate. For example, it will upsample an 11024Hz
source to 11025Hz, since that is the nearest supported rate, and there is no supported rate that is an even multiple
of 11024.
Last updated 1/16/2012
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