Analogue modules
Continuously varying electrical signals are passed to a loudspeaker to produce sound. The electrical signals are generated using electronic circuitry. Modules containing analogue fully electronic devices used to produce, process and communicate electronic sound signals and/or sequences of signals. These analogue modules use analogue signal combining, modifying, reproducing and processing devices. Mixers, sum/difference/multiple output generators etc., timbre modifiers, filter devices.
Analogue modules: signal modifiers or processors
Hornbostel - Sachs