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What does B5 and B4 mean?enter image description here

Is it referring to the bar number or the octave in which the note is present?

So is this B a B4? enter image description here

user34782
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    Letter names are really exactly what is said, letters for names. I have not seen any theory where you are expected to add the octave in your answer. – Neil Meyer Nov 25 '16 at 09:39
  • But does it represent the octave – user34782 Nov 25 '16 at 09:54
  • Octave designation is actually VERY common in music theory. – Richard Nov 25 '16 at 21:08
  • Yeah, poorly-written question on the assignment IMO. Anyone asks me "what letter name was that", my response is 'B' - the letter's name! Octaves are important, but if they wanted the scientific pitch designation they should have said so. – user45266 Oct 20 '20 at 20:05

2 Answers2

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It is called scientific pitch notation. From wikipedia we have:

Scientific pitch notation (or SPN, also known as American Standard Pitch Notation (ASPN) and International Pitch Notation (IPN))1 is a method of specifying musical pitch by combining a musical note name (with accidental if needed) and a number identifying the pitch's octave.

So the number is the octave. Middle C is in octave 4.

J. P. Petersen
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4 and 5 represent the octave! Letter B means it's a B note. enter image description here

The same way you say play the sequence C2-G2-C3-C2-G2-Bb2-Eb2-F2-G2 in a 4/4.

SovereignSun
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