User Manual

Output Format Reference for 23.976p, 24p, and 25p Projects
1077
The following table provides changes in audio rates if you are working in a 24p or 25p project:
If you are working in a 23.976 project, all output play rates are available, but only 23.976 NTSC
maintains the original audio quality. For 23.976 NTSC, the audio rate is not slowed down for
output and remains at 48 kHz. For 29.97 NTSC, the audio rate is sped up 25 percent and is not
usable. Use this output rate for animations and other special applications. 24 fps NTSC, 24 fps
PAL, and 25 fps PAL all require a sample-rate conversion, so high-quality audio is not
guaranteed.
24 (PAL) Audio for film
projection; DAWs
(video for
reference only)
Picture and sound to
PAL tape; sound to
DAT or mag tape
Plays back the sequence at 24 fps. This play rate tells your Avid
editing application to record audio at the film rate. For 25p projects,
audio is slowed down 4 percent. Video, when output to tape, can be
used only for reference because, to maintain sync, your Avid editing
application replicates a pulldown telecine transfer with one extra
pulldown field occurring every 12th and 24th frame. Use this option
when audio media files are being used for film projection (PAL
Method 2) or in a DAW, and you need a digital cut for picture
reference.
Pulldown is set to Off (1.00).
25 (PAL) PAL TV; video
screenings
Picture and sound to
PAL tape; sound to
DAT or mag tape
Plays back the sequence at 25 fps. For 24p projects, this play rate tells
your Avid editing application to speed up the sequence by 4.1 percent,
creating a frame-to-frame relationship between film and video (PAL
Method 1). For 25p projects, there is no change in playback speed.
There are no pulldown frames with this setting. Use this option for
PAL video output, such as a broadcast master.
Pulldown is set to Off (1.00)
Digital Cut
Tool Output
Format
(Play Rate)
Target Project or
System, and
Recording Media Description
Output Play Rate 24p Source 25p Source
23.976 NTSC 0.1% slowdown 4.1% slowdown
24 NTSC No change 4% slowdown
29.97 NTSC 25% speedup 20% speedup
24 PAL No change 4% slowdown
25 PAL 4.1% speedup No change