The main auditorium projects a different character as compared to the building envelope's ornamentality. A sequence of gradually lowered arches made of local wood, enhanced by panels with colorful motifs. These motifs were a combination of mangoes, bananas, and foliage painted by the brother of Juan Arellano, Arcadio. There are 3 organ chambers. Two are above on the walls beside the orchestral pit. One chamber, the antiphonal is on the proscenium. the organ was never installed and the chambers are filled with utility rooms and air conditioning systems. On top of the proscenium are figures symbolic of Music, Tragedy, Poetry and Comedy.Resembling bamboo stalks are the tapering lamps of translucent glass which surround the theater space. The focal point is the rectangular stage adorned with mango fruits and leaves motif.