Piszczalski in the 1970s, became the foundation of automatic music transcription. The most controversial and difficult step in this process is detecting pitch . The most successful pitch methods operate in the frequency domain, not the time domain. While time-domain methods have been proposed, they can break down for real-world musical instruments played in typically reverberant rooms. The pitch-detection method invented by Piszczalski again mimics human hearing. It follows how only certain sets of partials “fuse” together in human listening. These are the sets that create the perception of a single pitch only. Fusion occurs only when two partials are within 1.5% of being a perfect, harmonic pair (i.e., their frequencies approximate a low-integer pair set such as 1:2, 5:8, etc.) This near harmonic match is required of all the partials in order for a human to hear them as only a single pitch. See also Orchestration Timbre Composer tributes (classical music) :Category:Scorewriters Reduction (music) References Musical notation Musical tributes