Figure 3
From: Transcribing Bach chorales: Limitations and potentials of non-negative matrix factorisation
Effectiveness of ICTM-NMF as compared to standard NMF. Top pane: original piano roll of chorale Aus tiefer Not schrei ich zu dir; Bottom left pane: the transcription output from a standard NMF. Bottom right pane: the transcription output of the same chorale with ICTM-NMF. The y-axes represent the pitches from C2 (MIDI note number 36) to C7 (MIDI note number 96) while the x-axes represent time.