<｜begin▁of▁sentence｜>### Instruction:
As an audio engineer, you've been tasked with creating a surround sound layout for a new film. The film's sound design team has provided you with a tree structure representing the connectivity of the speakers. Now, they have requested that you use the `layout_reingold_tilford_circular` function in your audio software to generate and visualize a Circular Reingold-Tilford layout for the speaker setup. This visualization will help them understand the spatial arrangement of the speakers for an optimal surround sound experience.
### Response:
import igraph as ig

# Create a tree structure
edges = [(0, 1), (0, 2), (1, 3), (1, 4), (2, 5), (2, 6)]
g = ig.Graph(edges=edges)

# Generate a Circular Reingold-Tilford layout for the tree
circular_layout = g.layout_reingold_tilford_circular()

# Plot the tree using the generated layout
ig.plot(g, layout=circular_layout, vertex_label=range(g.vcount()))
<|EOT|>
