I've got a number of each brand of decoder, and there's no question that the Soundtraxx is by far the better decoder. There's a reason for the price difference.
Digitrax uses 8-bit sound encoding, while Souuntraxx uses 16-bit encoding. I don't consider myself much of an audiophile, but even to my untrained ears the Soundtraxx engines knock the socks off the others.
It takes an iron man to play with a toy iron horse.
You get what you pay for. I have only experience with N scale sound. Soundtraxx makes the better product.
Martin Myers
There is really no comparison, the Digitrax has poorer sound quality and does not handle LED's well at all. I just installed one in an SD70ACE and wish I had spent the extra and got a better decoder. I don't plan on getting any more of the Digitrax sound decoders.
Simon Modelling CB&Q and Wabash See my slowly evolving layout on my picturetrail site http://www.picturetrail.com/simontrains and our videos at http://www.youtube.com/user/MrCrispybake?feature=mhum
I want to put a sound decoder in an HO model of the Blue Comet engine i made from a new mantua pacific & was wondering how the digitrax sound compares to the Soundtrax. Not much experience with sound & am leaning toward the Digitrax because of price. Any suggestions? Thanks.