![]() It can also be used as a starting point, when figuring out other chords that have the same root note. The Major 7 chord in general is considered a kind of default chord, as it contains no altered notes of the Major scale (1, 3, 5, 7). ![]() The most common way to play the Bb Major 7 chord is with the root note on the 1st fret of the 5th string (second shape in the image below). It is essentially a B flat Major chord, with the 7th note of the Major scale added. It is produced by taking the root, 3rd, 5th and 7th of the Bb Major scale. See B (musical note) and Musical note#Note names and their history for explanations.The B flat Major 7 chord (also written as Bb Maj 7) contains the notes Bb, D, F and A. Natural B is called B by Swedish jazz and pop musicians, but still denoted H in classical music. Since the 1990s, B-flat is often denoted Bb or "Bess" instead of B in Swedish music textbooks. In Germany, Russia, Poland and Scandinavia, this pitch is designated B, with 'H' used to designate the B- natural. While orchestras tune to an A provided by the oboist, wind ensembles usually tune to a B-flat provided by a tuba, horn, or clarinet. See pitch (music) for a discussion of historical variations in frequency. When calculated in equal temperament with a reference of A above middle C as 440 Hz, the frequency of the B ♭ above middle C is approximately 466.164 Hz. B-flat is also enharmonic to C (C-double flat). It lies a diatonic semitone above A and a chromatic semitone below B, thus being enharmonic to A ♯, even though in some musical tunings, B ♭ will have a different sounding pitch than A ♯. B ♭ ( B-flat), or, in some European countries, B, is the eleventh step of the Western chromatic scale (starting from C).
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