Correction to: Quantum Information Processing (2020) 19:292 https://doi.org/10.1007/s11128-020-02772-9

In this article the wrong figure appeared as Fig. 6; the figure should have appeared as shown below.

Fig. 6
figure 6

Extraction of the two most salient pitches from a mixture of a male voice and a female voice


The original article has been corrected.