Servo control and DAC conflicts?

[WShawn]

Hello:

What's the simplest, smallest and most cost-effective way to control two servos and play a few audio files on a handheld prop? I keep reading that trying to control servos and drive a DAC at the same time creates conflicts due to timer interference. Or something like that. I'm a newbie, doing my best to figure this out after several hours of reading through forum posts.

I have an Itsy BitsyM0 Express and 2.5W amp on order to drive a PKE meter prop. (I have a prototype that's working with a Teensy 3.2 and Prop Shield LC, but you can't get the 3.2 anymore).

https://youtu.be/gct2NALXWS4

My two sound files would fit on the 2MB SPI flash chip built in to the Itsy Bitsy. It looks like the Audio_FeatherM0 library is my best bet for playing my sound clips when triggered.

I don't have enough experience to know whether there's some way to make the DAC and servos use different timers so both can work at the same time. Modifying the Teensy-specific Servo Library moved the servo timer from the PDB timer to the LPTMR on the Teensy 3.2. Is there an equivalent approach for microcontrollers using the SAMD21 processor?

I was hoping that the ServoTimer2 library could do this sort of thing, but it sounds like that's old and unsupported. Is there anything newer? I'd rather not buy a whole separate servo prop shield to drive two lousy servos.

Any guidance would be greatly appreciated. Thank you.