I have ridden the 765 many times. Trust me when I say that the whistle is spot on! It isn’t my favorite whistle if I’m honest, but it is very accurate. Lionel has a really good recording. I will be taking a look at the speaker when I’m installing the Kadee, but overall I am extremely pleased with the sound package, and anyone that knows me knows that I am a sound snob.
Also, remember that this test is on a hardwood table which brightens and reflects the sound. On a layout with scenery it sounds a little less sharp.
Here is a video I shot a few years ago when she came to town