Which musical instrument provides the leader of an orchestra with the concert pitch of the note 'A'?
A (musical note) A (musical note) La or A is the sixth note of the fixed-do solfège. Its enharmonic equivalents are B ("Heses") which is a diatonic semitone above A and G (Gisis) which is a diatonic semitone below A. "A" is generally used as a standard for tuning. When the orchestra tunes, the oboe plays an "A" and the rest of the instruments tune to match that pitch. Every string instrument in the orchestra has an A string, from which each player can tune the rest of their instrument. "A" is also used in combination with a number (e.g. A-440) to label
Concert pitch Concert pitch Concert pitch is the pitch reference to which a group of musical instruments are tuned for a performance. Concert pitch may vary from ensemble to ensemble, and has varied widely over musical history. In the literature this is also called international standard pitch. The most common modern tuning standard uses 440 Hz for A above middle C as a reference note, with other notes being set relative to it. The term "concert pitch" is also used to distinguish between the "written" (or "nominal"), and "sounding" (or "real") notes of a transposing instrument – "concert pitch" here refers to