THD meter circuit needed

[Paul Perry]

At 08:05 AM 7/08/00 +0200, Martin Czech wrote:

>btw. I currently run into the question why nobody seems
>to use LDRs for Wien amplitude regulation.
>
Probably because they are somewhat non-linear with voltage & 
give rise to some distortion, certainly if we are talking .005%
(which, if anyone can do on their soundcard, hats oof to them!)

paul perry melbourne austrlaia