I'm an electronics newbie, but I've had some experience with oscilloscopes in college lab. However, I need to design and wire a simple circuit that can read values from an electret mic. Since the electret mic produces really low voltages, I need to amplify it (a preamplifier).
The problem is, I do not have an oscilloscope and thus no way to know if the circuit works. Is there any way of knowing if the signal is amplified (or present) with a multimeter? I refuse to believe that every hobbyist out there who wants to play with audio signals has access to a DSO.