[PD] osc~ / phasor~ / cos~ ...sometimes clicking

[hard off]

has anybody else experienced small clicks every now and then from pd's
oscillators?

i have noticed it before with [phasor~], and today i was getting it
pretty badly with [cos~]..about 1 click every 10 seconds.

this is nothing to do with the contents of the patch, because just a
[cos~] connected to a [dac~] was making the same thing happen.
...it's nothing to do with dac~ or my sound hardware either, because
disconnecting the [cos~] from the [dac~] stopped the clicks.