For those that own a HSS3jb here's a patch to let you control it from PD. Port number is set to default 1.

I haven't yet figured out how to add a toggle to control which mode it is in. I think it is related to this bug.

http://www.pdpatchrepo.info/hurleur/hss3jb.pd

Use a phasor~ for the oscillator, a noise~ object for the randomisation, and a samhold~ to sample the noise value every time the phasor~ starts a new cycle.