I’m in the James F. Byrnes marching band. We’re a high school-level program who’s going to Grand Nationals this year. We actually sing a lot, as it’s a much more effective tool for strengthening our tonal center and oral shaping as an ensemble without valves or keys to guide our pitch. I never notice when we sing, but when I listen back to recordings, we actually sound a lot like a choir with our styling and technique.
It's honestly one of the greatest parts of DCI. I absolutely treasure the recordings I have where we sang stuff like the ballad and corps songs (with Spirit of Atlanta).