Hi, Don,
Regarding your question, as you know that the GDFLIB library is served for motor control, we have not the independent example. The filter function is used in the motor control example especially PMSM based on DSC/KV58/KV46..., because the KE0x is not used in PMSM sensorless control, so we have not the example for KE0x family.
BR
xiangjun rong