- fg.connect (src,src_head,s2fsmi,enc,mod)
- fg.connect (mod,(add,0))
- fg.connect (noise,(add,1))
- fg.connect (add,metrics)
- fg.connect (metrics,va,fsmi2s,dst)
+ tb.connect (src,src_head,s2fsmi,enc,mod)
+ tb.connect (mod,(add,0))
+ tb.connect (noise,(add,1))
+ tb.connect (add,metrics)
+ tb.connect (metrics,va,fsmi2s,dst)