ISD1820 play audio once

I’m working on a prop that uses two ISD1820s. It works by having a 3 way rocker switch, and i want it to play one sound once when the I is triggered, and play the other when the II is triggered. The problem is, it will only play if the PLAYE button is pushed and if the power is connected to it. I know how to set it up to repeat a sound when it receives power, but how do i activate it to play a sound once when it receives power?