User Guide
56
Changing the MP3 Bit Rate
The 664 records MP3 files at a default bit rate of 320kbs, but that bit rate may
be changed. A high bit rate MP3 file preserves more audio information with an
increased file size. A low bit rate MP3 file preserves less audio information with
a decreased file size.
To change the MP3 bit rate:
1. Press the MENU button.
2. Turn and press the Headphone encoder to select RECORDER > MP3 Bit
Rate.
3. Turn and press the Headphone encoder to select a bit rate. Options include:
128, 192, and 320 kbs.
Setting the Sample Rate
The 664 records WAV files at 48 kHz sample rate by default.
To set sample rate:
1. Press the MENU button.
2. Turn and press the Headphone encoder to select RECORDER > Sample Rate.
3. Turn and press the Headphone encoder to select a sample rate. Options in
-
clude: 44.1k, 47.952k, 47.952kF, 48k, 48.048k, 48.048kF.
The sample rate value is stored in file metadata. Those options with “F” are
F mode rates. The F stands for “faux” or “Fostex”.
F Sample Modes
The 48.048kF mode is used in specific work flows with Avid
®
, Final Cut Pro
®
,
and other post-production environments that do not recognize audio files writ
-
ten 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 sys
-
tems, 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 intermedi
-
ate step through other software to create the pull down.
When using 48.048kF sample rate, set main 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.
Summary of Contents for 664
Page 1: ... 664 Field Production Mixer with Integrated Recorder User Guide ...
Page 4: ...User Guide 4 ...
Page 20: ...User Guide 20 ...
Page 48: ...User Guide 48 ...
Page 60: ...User Guide 60 ...
Page 68: ...User Guide 68 ...
Page 76: ...User Guide 76 ...
Page 88: ...User Guide 88 ...
Page 108: ...User Guide 108 ...
Page 112: ...User Guide 112 ...
Page 118: ...User Guide 118 Status Bar Viewing Area Tab Bar ...
Page 140: ...User Guide 140 ...
Page 146: ...User Guide 146 ...
Page 174: ...User Guide 174 ...
Page 180: ...CS 688 180 ...