I'm planning to use 1/4" thick Homasote roadbed on the mainline of my layout, and with track down at the base (tabletop) level for the sidings, yards, etc.  The roadbed I've used thus far is the Homabed product produced by California Roadbed Company.  I really like the product, but have decided not to order any more due to the incredibly bad communication skills of the owner.  So I'm going to try manufacturing my own using Craig Bisgeier's method.

I finally finished the second of two spline helices for my N-scale layout that is under construction.  I have included a video, this time with sound, since it is a sound equipped engine, that shows the results of the first DCC test of the second helix.

I am about to start my layout that I have been dreaming about for 50 years!  I have built several modules in the past and helped with a couple of club layouts.  My question is about how to keep the track noise down so sound systems can be heard.  I saw an article in the January Model Railroader about using Dynamat (auto sound deadener) under cork road bed.  Has anyone tried this other than the author?  What would you suggest?  Homasote is not a commonly available product in the Denver area.

Thanks