Concert house, luxurious interior, grand staircase, velvet curtains, wooden flooring, intricate chandeliers, soundproof walls, optimal acoustics, perfect echo, golden ratio composition, warm ambient lighting, soft focus, shallow depth of field, intimate atmosphere, evening performance, spotlights shining down, pianist performing, elegant audience, formal attire, suits and ties, evening gowns, luxurious seats, red carpet, backstage area, sound control room, audio equipment, mixing console, speakers, microphones.