Anyone have an idea what kind of patch to use for testing whether libpd is functioning correctly?

I tried:

[osc~ 440] -> [dac~]

but since I’m not sure whether audio works yet, I’d like to test it on an array of 1.0s or something whose output I should know in advance.

I’m currently getting some output, but I’m not sure if it’s the output of [osc~ 440] -> [dac~] or merely some other noise since the values are e.g.: 2.1230615182310281E-314 -1.4044477616124616E+306 …