This is a popular singing warm used in the choir classroom. The voice part is passed out to all the students and the armonia section plays their part as accompaniment or the director plays the armonia part as the students sing.
I have included a version in Spanish as well.
The armonia accompaniment tries to fill the role of the piano in the choir classroom as they move up one key at a time during the warm up. Some keys have been removed from the warmup because of the playing difficulty level.
The bundle includes the following parts/documents
Voice in English and Spanish
Singing Warm Up-Bolero 2014 Finale file