Objective perceptual quality measures. (a) Solo: voice dataset. (b) Solo: instrument dataset. (c) Backing: voice dataset. (d) Backing: instrument dataset. Overall perceptual score (OPS), target-related perceptual score (TPS), interference-related perceptual score (IPS), artifact-related perceptual score (APS). Results with the two pitch detection algorithms (Alg1, Alg2) are presented. For comparison purposes, results obtained with ground-truth prior information are also presented (Prior).