Trumpeters were split into two groups and asked to play the note E-flat. One group of trumpeters played from an open-top railway carriage on a piece of newly opened track between Utrech and Maarsen, while the other trumpeters remained on the platform. When both groups were stationary then both notes were the same, but when the rail carriage was approaching, then a musically educated ear could detect that the note became higher, and it became even higher as the speed of the carriage increased. When the carriage moved away, the note became deeper. This change in pitch is associated with a change in the wavelength of the sound waves.
Chapter 3, The Great Debate, sub chapter World in Motion; page 243.
I also found a video that is similar to the above experiment:
Both of these experiments have the trumpeter(s) moving relatively fast, but while a marching band is marching, in the usual relatively slow speed, is there any notable difference in the pitch to a musically educated ear caused by the Doppler Effect?
I understand that the effect would not be that big, but does it happen at all?