I recently installed a sound decoder in a Walthers H10-44. This is the old model made by Roco. It is very heavy and runs well. I modified it for DCC, ground out the top weight, and installed a small Tsunami 2 1100 sound decoder. I put a "sugar cube" speaker on the rear truck. The sound is surprisingly good, but I'm unsure what the correct horn is. I can't find it listed here, so I chose a Leslie. Anyone know which sound is correct? Here is a link to choices: https://www.soundtraxx.com/dsd/tsunami2/sound/Baldwin and Other Sound Selections.pdf
Yes, a single, long trumpet Leslie. Don't know much about what sound to use. Usually, but not always (see the FP7's for example), the Frisco chose Leslie horns. Ken