Lighting effects modulated by sound signals - are proportional to sound intensity and frequency and introduced by smooth changes with time delay

摘要

The system provides lighting effects in accordance with sound volume and the acoustic frequencies. The change between colours is smooth and a time delay can be fitted to increase the effects produced. Three identical channels are used; bass, medium and high producing red, blue and green lights respectively. These reconstitute to white. A negative channel may be used for yellow. The pilot signal enters (1) the system and is regulated by a potentiometer (2). The signal is fed to the three filters (3) and a suppressor (4). The transistor (8) amplifies the pilot signal, passed through variable resistances to a phase modulator. The signal passes through a triode (19), triggered to control the lights (20).