Sound Devices 702T - Manual (Page 42)

702T User Guide and Technical Information
40
v. 2.67 Features and specifications are subject to change. Visit www.sounddevices.com for the latest documentation.
Using an external keyboard via the CL-1 Remote Control and Keyboard Interface the entry of notes
is much quicker than using the Rotary Switch.
If time code is turned off, metadata will still be written. Post-record metadata editing can also be per-
formed using a Mac OS or Windows based computer with Sound Devices Wave Agent Beta.
See Wave
Agent Beta for more details.
Recording Time Calculation
The calculation of available 702T recording time involves three factors:
• track count - how many concurrent audio tracks are selected for recording.
• data rate - calculated from the sampling rate and bit depth for non-compressed audio and by
bit rate for data compressed audio. Data rate determines how big the data “container” is for the
audio signal (see the calculation below for determining PCM audio).
• storage capacity - typically expressed in GB
Uncompressed Recording Time in Track-Hours
Data Rate (bit depth/sampling rate), one track
16/44.1
(5.05 MB/min)
16/48
(5.49 MB/min)
24/48
(8.24 MB/min)
24/96
(16.5 MB/min)
24/192
(33.0 MB/min)
Stora
g
e in GB
(1000 MB = 1 GB)
1 3.30 3.03 2.02 1.01 0.51
2 6.60 6.07 4.05 2.02 1.01
4 13.2 12.1 8.09 4.05 2.02
8 26.4 24.3 16.2 8.09 4.05
15 49.5 45.5 30.3 15.2 7.59
40 132 121 80.9 40.5 20.2
60 198 182 121 60.7 30.3
100 330 303 202 101 50.6
The chart above shows recording time available with the 702T. Time is expressed in hours per track
(track-hours) at the specified data rate supported by the 702T. If recording two tracks, divide the
track hours figure by two. Similarly for four-track recording, divide track-hours by four. Note that
the 702T supports additional sampling rate / bit depth combinations, however, only the most com-
mon are included below.
Record Time
The chart shows that when recording 24-bit/48 kHz audio to a 40 GB hard drive the maximum
amount of recording time available roughly 80 track-hours. If recording a stereo two-track file, this
yields 40 stereo hours of record time.