This circuit, to add the ambience effect, was suggested by National Semiconductor in documentation from the 90s. The amplifier needs an appropriate power source.
With this circuit from the September 1989 issue of Radio Electronics magazine, it is possible to...
Silicon Labs CSP Package EFM32™ Leopard Gecko 32-Bit MCUs are part of the world's most energy...
This cassette player motor speed control was found in the January 1991 issue of Radio Electronics...