04Revision of basic electricity - dc and magnetism; Revision of basic electricity - ac; Outlines of electronic devices; radio transmission; Decibels; Sound waves; Hearing; Basic acoustics; Microphones; Loudspeakers & headphones; Stereo; Basic signal processing; Visual monitoring; Analogue tape recording - editing; Vinyl discs; Principles of digital audio; Basics of digital tape recording - digital editing; Television transmission systems; Further digital equipment; Public address; Mixing consoles; General safety; Glossary; Further reading