update sweeps-csv.sh to use 8bit unsigned
update sweeps-csv.sh to use 8bit unsigned

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