During spare moments in the trip from Cradle, Beled and Bard and Ty had sat down together in private rooms, opened up the equipment cases, and made efforts to get the different ambots accustomed to each other, so that the Blue-programmed ones that most of them were using wouldn’t identify Bard’s more Reddish ammunition as innately hostile, and vice versa. So far it seemed to be working. When the shape of the valley funneled them all together, as when squeezing through a passage between boulders, Bard’s ambots seemed to catch the scent of the ones reposing in Beled’s snaky bandolier, and would crawl around to that side of Bard’s anatomy and aim their sensors in that direction, but it did not seem as though hostilities were about to break out. Since any one communications system was likely to be jammed or hacked by the opposition, your more highly developed ambots communicated with one another in a number of different ways, including sound. Ultrasound was preferred, but all frequencies were used, and so it was occasionally possible to hear Bard’s botmo spewing noise as it tried to evaluate, or possibly just to confuse, the Blue botmo all around it. Sometimes it was a hiss and sometimes it was a mathematical tune played too fast for the human ear to process it. In any case, nothing—at least, nothing audible to humans—came back from Beled’s, Ty’s, or Kath Two’s arsenals. Broadly speaking, Blue armaments makers were biased toward the "lots of dumb ambots" philosophy while Red ones went the other way.