Control pure data's pitch and volume in processing

This is pure data side: ![6RG~PYQ1GHVCC93MOXN">MG~PYQ1GHVCC93MOXN

I need use two sliders in processing to controls the pitch and volume. I use client to connect pure data and processing files. I know how to draw slider, but how can I use slider to change the values in PD?