The Zero and the MKR1000 use the DAC0 pin to play sounds.
NB : The AudioZero library and associated functions are experimental. While it is not likely the API will change in future releases, it is still under development.
Corrections, suggestions, and new documentation should be posted to the Forum.
The text of the Arduino reference is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.