digraph g {
rankdir=LR
node [margin=0.07 fontname="Arial", fixedsize=false, penwidth=3]
edge [penwidth=1.5; arrowsize=.75; minlen=1.99]
console [shape=box, style=rounded]
socket [shape=box, style=rounded]
wp [label=<wire<br/>protocol>, shape=circle, color=red, penwidth=5]
voice [label=<sum of<br/>voices<sub>0..63</sub>>, shape=circle, color=green, penwidth=5]
ma [label=<audio<br/>callback>, shape=circle, style=dashed, color=blue]
out [label=<audio out >, shape=box, style=rounded]
console -> wp
socket -> wp
wp -> voice [color=red, penwidth=4]
voice -> ma [color=green, penwidth=4]
ma -> out [color=blue, penwidth=4]
}