refctoring of demodFM2
refctoring of demodFM2

jniemann66/ReSampler,jniemann66/ReSampler,jniemann66/ReSampler,jniemann66/ReSampler,jniemann66/ReSampler,jniemann66/ReSampler,jniemann66/ReSampler,jniemann66/ReSampler