SPSF posted:Not opinion. If you cannot distinguish between the two, you are tone deaf. I have photographed just about ALL Santa Fe SD40, SD45, SD45-2, F45, FP45 and remember when the GP60 came out it had a Different sound. It wasn't in my head, It is a different sound. I saw these both at idle and accelerating.
Tell me that these sound the same:
https://www.youtube.com/watch?v=lavPKAsDlp4
https://www.youtube.com/watch?v=dViB5ckrRdE
If I looked at it from the non- railroad side, the first thing I would demand is that the same equipment be used to record each engine in the exact same conditions, same exact location. That would also include facts like rpm and such, at idle.
That might not seem like much. After handling audio equipment for years I have noticed quite some differences. Now, with mics built into phones and cameras, it might seem to level the field. I would not trust them to be the same.
So comparing 3 idling engines recorded from overhead, to a more modern one at trackside, without even knowing what was used, seems ridiculous to a person like me.
