Sampling Rate And Bit Depth; Sampling Rate; Sampling Frequency And Audio Bandwidth - Sound Devices 788T-SSD User Manual And Technical Information

788T/788T-SSD User Guide and Technical Information

Sampling Rate and Bit Depth

The 788T generates uncompressed PCM audio WAV fi les in the Broadcast Wave File format at the
user-selected sampling rate and bit depth. The 788T LCD displays the remaining available record-
ing time based on the sampling rate, bit depth, number of assigned tracks, and the selected storage
media's available capacity.

Sampling Rate

When a sampling rate is selected for recording, all tracks are recorded at the selected sampling rate.
Sampling rates are selected among common rates from 32 kHz to 96.096 kHz. Additionally, non-
standard sampling rates can be applied when the 788T is word clocked from an external source
(clock sources between 32 kHz and 96.096 kHz). When recording off-speed sampling rates, fi les will
be stamped with the rate closest to the internally generated frequency.

Sampling Frequency and Audio Bandwidth

The sampling frequency is expressed in samples per second (hertz) and defi nes the number of times
in a second that the analog audio signal has been measured. Sampling frequency determines the
audio bandwidth, or frequency response, that can be represented by the digital signal. A quick esti-
mate of the maximum bandwidth capable of being represented at a given sampling rate is maximum
analog frequency = sampling frequency/2. Higher sampling frequencies allow for wider audio
bandwidth.
The 788T generates the following sampling rates:
• 32 kHz
• 44.1 kHz
• 47.952 kHz
• 47.952kF - fi le stamped at 48 kHz
• 48 kHz
• 48.048 kHz
See Time Code for more information about the 47.952kF, 48.048kF, 96.096kF rates.
Things to consider when recording High Sampling Rates (above 48.048 kHz):
• Real time recording to DVDRAM is not recommended.
• Sound Devices strongly recommends using high speed UDMA CompactFlash cards.
• Input Limiters are disabled.
• Limits recording to only two storage media at a time.
• Track counts are restricted to 8 tracks.
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v. 1.71 Features and specifications are subject to change. Visit www.sounddevices.com for the latest documentation.
See Apendix A - Record Time Calculation.
• 48.048kF -fi le stamped at 48 kHz
• 88.2 kHz
• 96 kHz
• 96.096 kHz
• 96.096kF - fi le stamped at 96 kHz