Right; there are a couple of MR-63's that were equipped with test electronics (the Jeumont's) and they make all 5 tones. The rest of the production MR-73's just make 3 (well, they make all 5, but it's hard to hear). The test ones were retrofitted to see if the concept would work before the MR-73 buildout (Bombardier's first huge rail contract, actually!).
Awesome you got a ride on the AZUR! How many are in service, now?
Awesome you got a ride on the AZUR! How many are in service, now?