Figure 4From: Musical note analysis of solo violin recordings using recursive regularizationSix vibrating notes presented in the following order: E5, D5, C5, B4, A4, G4, and A4+B4. The spectrograms of (a) the original, (b) the harmonic-constrained NMF [13], (c) time-depend parametric NMF [5], and (d) the proposed method of G4, A4, B4, C5, D5, and E5 notes that include vibrato.Back to article page