
Preface to the third
edition
When the second edition went to press just over two years ago
it seemed that there was little scope for a further edition for
some considerable time. Yet since then there have been a
number of developments and areas of growing interest in the
audio field which need to be covered.
The Sony Mini Disc has arrived employing magneto-
optical technology that is totally new to audio, although used in
computer data storage. Information on this has therefore been
added to the CD section.
Surround sound is again in the news with the Sensaura
system that is claimed to give a sensation of sound from all
directions, using onl ...