Mp3 compressed record time in hours, File naming / numbering, Scene name/numbering – Sound Devices 744T User Manual
Page 47: Compressed audio
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MP3 Compressed Record Time in Hours
MP3 Data Rate (bit depth/sampling rate), stereo track
32 kb/s
(0.2 MB/min)
64 kb/s
(0.47 MB/min)
96 kb/s
(0.70 MB/min)
128 kb/s
(0.94 MB/min)
160 kb/s
(1.17 MB/min)
192 kb/s
(1.40 MB/min)
256 kb/s
(1.86 MB/min)
320 kb/s
(2.34 MB/min)
Stora
g
e in GB
(1000 MB = 1 GB)
1
72.8
36.4
24.2
18.2
14.5
12.1
9.1
7.2
2
145.6
72.8
48.5
36.4
29.1
24.2
18.2
14.5
4
291.2
145.6
97
72.8
58.2
48.5
36.4
29.1
8
582.5
291.2
194.1
145.6
116.5
97
72.8
58.2
16
1165
582.5
388.3
291.2
233
194.1
145.6
116.5
40
2912.7
1456.3
970.9
728.1
582.5
485.4
364
291.2
60
4369
2184.5
1456.3
1092.2
873.8
728.1
546.1
436.9
80
5825.4
2912.7
1941.8
1456.3
1165
970.9
728.1
582.5
100
7281.7
3640.8
2427.2
1820.4
1456.3
1213.6
910.2
728.1
160
11650.8
5825.4
3883.6
2912.7
2330.2
1941.8
1456.3
165
The chart above shows recording time available with the 744T when recording to an MP3 file. Time
is expressed in hours at the specified MP3 supported by the 744T. Note that all recordings are two-
channel recordings.
Compressed Audio
When digital audio is compressed using some form of lossy, perceptual process such as MPEG2-
Layer3 (MP3 audio), Windows Media encoding (WMA), ATRAC encoding (used in MiniDisc), AAC
(MPEG-4 audio), or others - it can have a significant reduction in its data rate. Compressed audio has
enabled the practical distribution of audio over low speed data networks.
File Naming / Numbering
Files generated by the 744T are named using a syntax made up of four parts: scene name/number,
take number, mono track designator (if mono file is selected), and file extension.
scene
number
take
number
extension
mono
file
designator
S001T01_1.WAV
Post-record metadata editing can also be performed using a Mac OS or Windows based computer with
Sound Devices Wave Agent Beta.
See Wave Agent Beta for more details.
Scene Name/Numbering
Scene names are selected for use from a scene name list. This list is accessed from the setup menu.
Any number of scene name lists can be generated and these can be made up of any number of scene
names. The advantage of scene name lists is that scene names can be built before production so that