Luminosity- and mass-weighted mean stellar age (first and second row), and metallicity (third and fouth row) residuals for FADO (blue and cyan lines) and STARLIGHT (red and orange lines), obtained with MUSE (4800–9300 Å) and CALIFA (3500–7000 Å) spectral coverage (see labels) for a continuous SFH (CONT models). The S/N of the input REBETIKO spectra are indicated on the top of each panel.