Good evening, Bene
Sorry to keep you waiting.
According to my research, there are a lot of meanings for this term 'range'.
So, let me present some of them I believe it is related to the band's ideals.
1st = Arranjo Musical (Musical Arrangement).
Have you prepared the musical arrangements? = Você preparou os arranjos musicais?
Note: Range would came from the word arrangement.
2nd = Diversidade (Diversity).
Diversity leads to innovation = A diversidade conduz à inovação.
3rd = Alcance, abrangência, patamar.
What is the range of the new ballistic missile? = Qual é o alcance do novo míssil balístico?
4th = Variação, míriade = (variation; myriad)
The participants in the survey gave us a wide range of response. = Os participantes de nossa pesquisa nos deu uma ampla variação de respostas.
Note: A myriad (from Ancient Greek μυριάς, myrias) is technically the number ten thousand; in that sense, the term is used almost exclusively in translations from Greek, Latin, or Chinese, or when talking about ancient Greek numbers. More generally, a myriad may be an indefinitely large number of things.
I hope I've helped you.