Hobbies Playing Music All About Middle C in Music The Definition of Middle C Pitch Share PINTEREST Email Print Jutta Kuss / Getty Images Playing Music Playing Piano Tutorials Piano Chords Buying Advice Music Education Playing Guitar Home Recording By Brandy Kraemer Updated March 02, 2019 Middle C (C4) is the first note of the fixed solfège scale and the half-way point on the piano keyboard. It is called middle C because it is the centermost C on a standard 88-key piano, 4 octaves from the left end of the keyboard. Notation of Middle C on Different Clefs Across a variety of instruments and clefs, middle C is often referred to by musicians. In piano performance, middle C serves as an approximate border between notes played with the left hand (bass notes) and notes played with the right (treble notes). In sheet music, middle C is written on the first ledger line below the treble staff and the first ledger line above the bass staff. Treble Clef: Middle C is notated on the first ledger line below the staff Bass Clef: Middle C is notated on the first ledger line above the staff Alto Clef: Middle C is notated on the middle (third) line of the staff Tenor Clef: Middle C is notated on the fourth line of the staff Tuning of Middle C In concert pitch, which is A440, middle C resonates at a frequency of 261.626 Hz. In scientific pitch notation, middle C is designated as C4. Middle C Synonyms Although commonly called middle C, there are other names that are often used to describe this pitch: C4; MIDI #60 c1 (U.K. pitch notation) do3; do centrale (It) do3; do central (Fr) c i; eingestrichenes C (Ger) Learn how to locate middle C on the piano or on different sizes of keyboards.