Sound Devices 633 - Manual (Page 42)

Media can also be formatted from the File List Screen by highlighting the desired media, sliding the RTN
/ FAV Switch left or right, then selecting Erase/Format from the available options.
The 633 uses the FAT32 file system for all cards 32 GB or less in capacity. Cards with a capacity
greater than 32GB are formatted with the exFAT file system. FAT32 and exFAT are compatible with
all current major operating systems.
The exFAT file system is not compatible with Windows XP or Mac OS X 10.6.4 or lower.
Pre-Roll
To prevent missing record cues or up-cutting takes, the 633 has pre-roll buffering available. When
active, pre-roll begins recording at a set number of seconds preceding the record command. The Pre-
Roll time can be adjusted from 0 to 6 seconds the Setup Menu option RECORDER > Pre-Roll Time.
Maximum pre-roll time is reduced in the following conditions:
• When recording mono WAV files to any media: 3 second maximum pre-roll time.
• When RECORDER > Sample Rate is set to 88.2k or 96k: 3 second maximum pre-roll time.
• When RECORDER > Sample Rate is set to 192k: 1 second maximum pre-roll time.
• Pre-Roll is disabled when the timecode mode is set to Record Run,
External Timecode Auto Record , or External Timecode Continuous Auto Record. This prevents
possible overlapping timecode numbers between adjacent files.
“F Mode” Sample Rates
48 .048k and 48 .048kF
The 48.048kF mode (F stands for “fake”, “faux”, or “Fostex”) is a specific compatibility mode for use
with the Fostex DV40 software (1.74 and previous), Avid, Final Cut Pro, and other post-production
environments that do not recognize audio files written at 48.048 kHz. In this mode files are recorded
at a 48.048 kHz sampling rate but are stamped at 48 kHz. When played, they will play back 0.1%
slower than real time.
One use for the 48.048kF mode is to force a 0.1% speed reduction (pull down) of audio to match
MOS-telecined film (24 fps-to-NTSC) in non-linear edit systems, such as Avid or Final Cut Pro. Since
the file is stamped as a 48 kHz file, the edit system will play it back at 48 kHz and not at 48.048 kHz.
This “audio pull down” will match the transferred picture without the need for an intermediate step
through other software to create the pull down.
When using 48.048kF sample rate, set Setup Menu option TIMECODE > Frame Rate to 30ND or
24. When set to 30ND, files will be stamped with a frame rate of 29.97. When set to 24, files will be
stamped with a frame rate of 23.97ND.
Fostex DV40
When using files recorded in the 48.048kF mode with a DV40 with early software, set the DV40 time-
code frame rate to 29.97ND. Timecode stamps will properly match the original timecode start times.
47 .952k and 47 .952kF
Both 47.952 and 47.952kF settings use a record sampling rate of 47.952 kHz, 0.1% lower than 48 kHz.
The 47.952kF mode, however, identifies the file as being recorded at 48 kHz.
633 User Guide and Technical Information
36
v. 1.02 Features and specifications are subject to change. Visit www.sounddevices.com for the latest documentation.
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