I was thinking I'd have to use a thread.
The idea is to try and implement LPC10 encoding of live input.
LPC10, as defined my Texas Instruments in the late 1970s works in 20ms frames. Off the top of my head that's roughly 60 K-Rate cycles to analyse a 20ms buffer filled during the previous 20ms period.
I have no real idea if this is possible on the Axoloti's MCU.
Looking at some example LPC encoding code, to my very much untutored eye, it looks relatively simple, but there's a lot of looping involved, so what looks like a few lines of code could potentially take up a large number of processor cycles.
I've been looking at
Which is a non-realtime OS X desktop application to convert audio to LPC10 pitch, energy and lattice filter coefficients.