Townshend Computer Tools DAT-Link - 5.6 Repeating a Passage; 5.7 Sampling Rates

54 Playback Tutorial
The playback time, in seconds, can be set using the -t option. For example, to
playback the rst 5 seconds of a le use:
naplay -t 5 file
Note that the -t option can not be used with the -r option. If neither option is
given, playback will continue until the end of the le.
Whether or not a duration is given on the command line, the naplay program can
be interrupted at any time by hitting the interrupt character (usually control-C).
5.6 Rep eating a Passage
The entire le or the passage selected using the ab ove options can b e rep eated any
numb er of times by using the -R option. The numb er of repetitions is given as the
argumenttothe -R option:
naplay -t 10 -R 3 file
results in 30 seconds of playback consisting of the rst 10 seconds of the le repeated
3 times. Note that there will be no space b etween the repetitions.
5.7 Sampling Rates
There are two sampling rates of importance in playing back a le; the rate at which
samples are sent to the DAT machine, and the sampling rate of the le that is to
be played back.
5.7.1 DAT Sampling Rate
Digital audio equipment usually accepts three p ossible sampling rates: 32,000,
44,100, or 48,000 samples/second. The most common rate is 48,000 samples/second
and this is the default for the naplay program. The 44,100 is usually only used for
compact disks or pre-recorded tap es.
The digital audio sampling rate can be changed using the -S option to naplay . To
playback a le such that the DAT records it at 44,100 samples/second use:
naplay -S 44100 file
Note that it is assumed that the le being sent to the DAT is sampled at the
same rate as chosen with the -S option. In this case, le should contain audio