The easiest first sound installations are cab diesel units, because of the space available and ease of wiring. E's, F's, Alco PA's, etc. If steam locomotives are pre-wired for decoders in the tender, then those are also easy first-time projects. Here is a thread on installing sound in the Kato PA (scroll down the thread for photos): https://www.trainboard.com/highball...-into-kato-f3-7-e8-9-pa1.101712/#post-1001759 And here's a thread on how I converted a Bachmann Berkshire over to ESU LokSound: https://www.trainboard.com/highball...sound-tutorial-with-photos.82075/#post-920069 As for decoders, I don't think there is much question that for diesel sound installations, the ESU LokSound Micro (for N scale) is the way to go. LokSound has the largest library of prototype sound files, actually recorded from existing engines. The LokSound is also very versatile when it comes to lighting. The Micro decoder has at least 4 function (lighting) outputs, which means you can do a front headlight, a rear light, and alternating front ditch lights if you want. Some versions of the LokSound micro (the "board" Select Direct versions - ESU #'s 73100 and 73199) have six functions, so you can also add alternating rear ditch lights. For steam, I still use the LokSound, but the Soundtraxx Tsunami 2 is also a good choice. Do a search of both this forum and the DCC forum for threads on LokSound sound installations (search for "LokSound") and you'll find a lot of ideas. Rick Brodzinsky has done a lot of installations and posts here on Trainboard about sound installations and you can search his name and find them. Getting good sound in N scale is imminently doable, but takes some work. Usually, some frame milling is required for diesel installs, but this can often be done with a Dremel and appropriate cutting bits. Good soldering skills are required, but easy to learn with a bit of practice. It's not rocket science, but it IS skilled work. John C.