I've seen countless posts on recording audio (both electret & MEMS), writing WAV files, specifying custom interrupt timers, and optimising writing to SD cards. I've seen articles about recording audio to SD on other Arduino boards (not the SAMD21 chips). But try as I might, the closest I get is awful, noisy, faint audio...
...is this actually possible?! On paper the MKRZERO seems perfectly capable and I assume it is my inexperience that is the limiting factor, but I thought I'd ask.