No, the x- and y-values are controlled using CapyTalk and therefore update at capyRate (1 ms). Every module can output an array though, since it's just a framed stream of samples.
I can think of ways to update at sampleRate, but the your frameLength would be fixed. So to update a frame of let's say 4096 samp it takes about 8 ms anyway, I don't know what you would gain from that...
Anyway having a look at your Sound I see you are clipping a lot, you need to make sure that your y-values stay within the -1,1 range.