@Alex Rogers, @Peter Prince
I've just started experimenting with Simplicity Studio and have already run into problems.
I followed the instructions for downloading and installing Simplicity Studio and successfully built the Minimal AudioMoth Project and flashed the resulting binary to a device.
However, when I tried to build v1.4.1 firmware, after replacing main.c with the version from AudioMoth-Firmware-Basic and adding digitalFilters.c and digitalFilters.h, the build failed with undefined references to sqrtf, csqrt, hypotf, sinf & tanf in digitalFilter.c.
Is there a problem with the source code or am I doing something stupid?