Convert sound frequency to voltage and vice versa

[magnus0]

I know it can be done somehow, but I need schematics.

[Enzo]

They already make chips for it

http://www.national.com/mpf/LM/LM2917.html

And for more just enter "frequency to voltage converter" into Google. There are more than one brand of V/F converter chips. There are articles about the concept and circuits.

[magnus0]

They already make chips for it

http://www.national.com/mpf/LM/LM2917.html

And for more just enter "frequency to voltage converter" into Google. There are more than one brand of V/F converter chips. There are articles about the concept and circuits.

"They already make chips for it"

I feel like I've been living underground for a long time lol