Audio Engineering

Digital Audio Fundamentals 433

Buffer

memory

Read

Audio out DAC Continuous audio samples

Seek Seek

Figure 14.16 : In a hard disk recorder, a large-capacity memory is used as a buffer or
time base corrector between the convertors and the disk. The memory allows the convertors
to run constantly, despite the interruptions in disk transfer caused by the head moving
between tracks.

Figure 14.17 : A disk-based audio recorder can capture audio and transmit compressed

audio fi les over the Internet.