[sdiy] Measuring Vpp

[Nicholas Keller]

The scope I have isn't great, more just for visual display of waveform than accurate measurements.   I can't afford to get a proper scope, so I'm looking for another way to calibrate outputs to 10Vpp and 20Vpp.  I looked up how to do it with a DMM and it seemed more complicated than I had hoped. Does anyone here have a suggestion of how to do this (easily) using a DMM, decibel levels, or freeware?  

Thanks in advance

Nick