Recording Time Calculation

MP3 Compressed Record Time in Hours

in GB

= 1 GB)

Storage

(1000 MB

 

 

MP3 Data Rate (bit depth/sample rate), stereo track

 

 

64 kb/s

96 kb/s

128 kb/s

160 kb/s

192 kb/s

256 kb/s

320 kb/s

 

(0.47 MB/min)

(0.70 MB/min)

(0.94 MB/min)

(1.17 MB/min)

(1.40 MB/min)

(1.86 MB/min)

(2.34 MB/min)

1

35

23

17

14

11

8

7

2

71

47

35

28

23

17

14

4

142

94

71

56

47

35

28

8

284

189

142

113

94

71

56

15

533

355

266

213

177

133

106

40

1422

948

711

568

474

355

284

60

2133

1422

1066

853

711

533

426

100

3555

2370

1777

1422

1185

888

711

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.

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