Technical documentation for 'Separated drum stems as measuring instruments: an error budget of four open separators for microrhythm analysis'

Technical documentation for the article 'Separated drum stems as measuring instruments: an error budget of four open separators for microrhythm analysis'. It gives the design of the study, the full settings of the four separators (Spleeter, HT-Demucs, BS-RoFormer, SCNet-XL), the validation of the onset detector, all timing and shape measures with their test statistics, the analysis of missed strokes and of the detector's threshold, the comparison of BS-RoFormer and SCNet-XL, a masking check, the correlations of developer metrics with fidelity, the details of Experiment 2, further statistics of the local timing statistic, the statistical methods, and the basis of the recommendations. The analysis code and per-track results are archived at https://doi.org/10.5281/zenodo.23319301.