I was wondering how to route signal for this problem: A vocalist wants to hear reverb whilst singing, but I don’t want to hear it and I don’t want it on “tape”. And... Given a speed of sound of 335m/s, what is the wavelength of a sound with a frequency of 200Hz? To answer such a question where is a good resource on the net? I have a few similar questions that I'm a bit lost with that are similiar. This will help me out a lot. Thanks.