Heyy!
I'm designing light organ, it's done only but filter section left to do
I do bandpass filter for detecting different amplitudes of audio frequencies, i have no trouble so far doing LPF section of bandpass filter, but with same cutoff HPF section somehow causes opamp output to have it's lower/minus side of sine wave to be cut off, even if input voltage is correctly biased for this opamp, LM358, it should be adequate for audio speed, but is there are other fault?
simple circuit i'm using:
edit, sorry about topic typo, filter cutoff is 30hz i'm using, if that matters, just for testing
**broken link removed**