This circuit is from a Radio Electronics from December 1990. The circuit was used in a home theater system.
This circuit can work with almost any JFET. The circuit is from an Electronics Now from April...
September 2017 - Texas Instruments PCM186x and PCM186x-Q1 Audio ADCs can be found at Mouser...
The IC used in this project is not common these days, but if you have one you can build a high...