The whole point of Life is to sync breathing audio to the animation. So, nope.
That said, some years back I started working on a way to play speech audio via Life, which would interrupt the breathing in the correct manner then play the speech line and go back to breathing. Lots of edge cases to handle, like not interrupt mid-breath, do you speak after breathing in, or breathing out, both? Lots of things to consider and logic to handle. Like you want to play a longer series of speech lines with breathing in between.
TL;DR: Its fairly complicated to do properly and I never got the time to finish it.
I have not looked at the code, but my understanding is you could change it from PlayNowClearQueue to PlayNow or give the option for something like that in the UI and it should still play and sync but allow other audio to come through at same time similar to how Vammoan works.