  Coincidence Doppler Broadening Spectroscopy (CDBS) of the 511 keV
annihilation line reveals the elemental signature at the annihilation site in
matter. For this reason, CDBS enables the analysis of foreign atoms in the host
matrix, vacancy-solute complexes and precipitates in solids. Due to the lack of
a comprehensive program for the analysis of CDBS data we developed a modular
python-based open source software solution for the reliable extraction of the
annihilation line to provide so-called ratio curves highlighting the elemental
signature in the spectra. In particular, the new program allows the readout and
spectra averaging of multiple detector pairs. Moreover, we implemented an
improved algorithm to further reduce the background by about one order of
magnitude at high Doppler shifts.
