Hello.
This is a pretty common audio application, but I stuck with it.
On a practice the schematic with TL072 of any other similar jfet input opamp produce an audio noise. This is not self-oscillation or hum. However if TL072 replace with any bipolar input opam, like old MC1458 it works perfectly. Does anyone ever have the same problem? I wonder where do I make a mistake with design?
Thank you for help and explanations.
