Celebrations are held for many occasions such as a tooth-filing (coming-of-age ritual), cremation or "odalan" (temple festival). One of the most important concepts that Balinese ceremonies have in common is that of "désa kala patra", which refers to how ritual performances must be appropriate in both the specific and general social context. Many of the ceremonial art forms such as "wayang kulit" and "topeng" are highly improvisatory, providing flexibility for the performer to adapt the performance to the current situation. Many celebrations call for a loud, boisterous atmosphere with much activity and the resulting aesthetic, "ramé", is distinctively Balinese. Often two or more "gamelan" ensembles will be performing well within earshot, and sometimes compete with each other to be heard. Likewise, the audience members talk amongst themselves, get up and walk around, or even cheer on the performance, which adds to the many layers of activity and the liveliness typical of "ramé".