Does anyone know of a simple VCA (Voltage Controlled Amplifier) hack that would use an LM358 op amp instead of a transconductance op amp?
I want to control the volume level on an audio signal using a voltage.
The voltage is coming from an 8 bit R2R resistor DAC, and so is the audio signal itself.
One constraint is that when the controlling voltage is zero, the audio signal must also be zero (totally mute).
I want to use an LM358 because I have them available in my circuit.
Found this already, and have not tested it yet, but all input welcomed as always!