expyfun is a python module designed for running audiovisual psychophysics experiments. Prominent features include integration with TDT audio hardware and EyeLink eye tracking hardware, audio synchronization with display refresh times, and a wide variety of helper scripts for stimulus generation, analysis and plotting. Summary of changes since first release (not an exhaustive list): dropped Pyo in favor of Pyglet audio expanded EyeLink support new stimulus creation, analysis and visualization methods, including convolve_hrtf, fit_sigmoid, and barplot some changes to the API of ExperimentController (most notably the replacement of flip_and_play with start_stimulus)