STSW-STWINKT01 includes microphone ultrasound FFT SW example and PC GUI to display the FFT data.
FP-IND-PREDMNT1 BLE example provides ISM330DHCX FFT data of accelerometer into ST BLE sensor app. There are limitations in the speed of FFT refresh rate on phone side though.
FP-IND-PREDMNT1 WIFI example (with separate WIFI extension) provides FFT data for IIS3DWB accelerometer into the ST Cloud Dashboard.
FP-IND-PREDMNT1 includes the MotionSP middleware making the FFT calculations that can be then easily re-used in own application.
Another option still is to use STEVAL-109V3 ProfiMEMS tool and IIS3DWB adapter board + UNICO GUI where FFT is calculated in the PC and displayed real-time.
