Hi guys! I'm trying to convert an old analog synth into a digital one. the synth is supplied with electrical current and has a speaker. I'd like to remove the speaker and make the Arduino read the values that should go to the speaker.
What do i need? an external chip, an adc converter or whatever?
Can I only connect to the ground the black wire that should go to the speaker and red one through a capacitor and then to the arduino? then can i read the values from the serial monitor?
I upload a photo of the synth