As the thread suggests, I am trying to amplify the signal from a microphone. Now, I have a circuit which uses 2 op amps with dual supply. That circuit works pretty well. I have to make now, a amplifier using only one op amp, single supply. The sound itself isn't of much importance, I just need the signal, it can be distorted(a little), because I am not sending that signal to a speaker, but to a LED driver, in bar mode. I attached a circuit. Can this be done with only 1 op amp, and if it can, can somebody suggest me a circuit? Thank you. p.s. I am using elecrtet microphone.