The international sampling rate—32 kHz—is used for
broadcast digital audio. Because the maximum bandwidth
in broadcast transmission is 15 kHz, the 32 kHz
sampling rate is suffi cient. For laser disc, compact disc,
and digital tape recording, 44.056 kHz, 44.1 kHz, and 48
kHz, respectively, are used. Generally, standards for the
digital versatile disc (DVD) are 48 kHz and 96 kHz. DVDs
comprise several formats, however, some of which use
higher sampling rates, as does the Super Audio Compact
Disc (SACD) (see 6-3; see also “Digital Versatile Disc”
later in this chapter).