Audio Project Settings: Main Tab
  The options that appear in this tab depend on your audio configuration and the audio hardware installed on your system. Your options might differ from those listed here.
Audio Project Settings Options (Main Tab)á
Setting
Options
Description
Sample Rate
32 kHz
44.1 kHz
48 kHz
Allows you to select audio rate settings for the entire system for playing and capturing. The default sample rate for DV is 48 kHz.
The broadcast standard for most high-end video postproduction houses is 48 kHz. Select the rate based on the requirements of your facility.
For information on changing the sample rate for individual sequences and audio clips, see Changing the Sample Rate.
Audio File Format
OMF (WAVE)
OMF (AIFF-C)
MXF
SDII (Macintosh only)
Select the file format for the audio:
  OMF (WAVE) is compatible with Windows applications.
  OMF (AIFF-C) is compatible with many third- party applications, including Pro Tools.
  MXF enables easy exchange of material between file servers, tape streamers and digital archives.
  SDII (Macintosh only) is compatible with Macintosh applications.
Select the AIFF-C format for all audio media when you need to transfer audio media files directly to a ProáTools or an AudioVision system for audio sweetening.
Audio File Sample Size
16 Bit
24 Bit
Select this option to set the sample size used when you work with audio files:
  16 Bit is for CD-quality audio.
  24 Bit is for work with higher resolution audio.
DV Audio Pattern
Locked Audio
Unlocked Audio
DV Audio Pattern works with all devices. However, because some devices check the DV Audio Pattern setting before transferring or capturing, you should select the DV Audio Pattern setting expected by your device.
  Locked Audio keeps the audio clock locked precisely to the video clock, so exactly the same number of audio samples and video frames are captured or transmitted in each cycle of the phase relationship.
  Unlocked Audio allows some imprecision in the audio sample rate, with a variation of up to +/– 25 audio samples per frame.
Render Sample Rate Conversion Quality
High and Slow
Balanced
Low and Fast
Allows you to set the conversion quality of all non-real-time sample rate conversions.
Convert Sample Rates When Playing
Always
Never
Allows you to choose whether or not to perform the conversion rate:
  Never plays the segments not set at the sample rate as silence.
  Always makes the system attempt to perform a sample rate conversion on-the-fly. Although the resulting audio quality might not be useful for a finished project, it can be useful during an editing session since it prevents audio from playing back with silence.
For information on changing the sample rate for individual sequences and audio clips, see Changing the Sample Rate.
Show Mismatched Sample Rates as Different Color
Yes
No
Allows you to identify a specific sample rate by color if you have a sequence with several different sample rates.
Real-Time Audio Dissolves
Disabled
Enabled
Allows you to play audio dissolves (also called crossfades) as real-time effects. Select Disabled if you experience an audio performance delay on your system.
Dissolve Midpoint Attenuation
Const Power –3dB
Linear –6dB
Sets the method used for audio dissolves:
  Const Power –3dB uses constant power to maintain a consistent sound level through the midpoint of the dissolve.
  Linear –6dB uses a linear gradient to maintain a consistent amplitude through the midpoint of the dissolve.
Optical Connection
ADAT
S/PDIF
TOSLINK
Allows you to select an output for use with an optical connection.

Some features described in Help are available only in Avid Xpress Pro or Avid Xpress DV. For more information about Avid Free DV go to
www.avid.com.