Five soprano singers were recorded while singing similar texts in both choir and solo modes of performance. A comparison of long‐term‐average spectra of similar passages in both modes indicates that subjects used different tactics to achieve somewhat higher concentrations of energy in the 2‐ to 4‐kHz range when singing in the solo mode. It is likely that this effect resulted, at least in part, from a slight change of the voice source from choir to solo singing. The subjects used slightly more vibrato when singing in the solo mode.