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I am working through my grade 1 theory book and am a little confused on a question. I have learnt that you either use key signatures or accidentals when writing out a scale. Not both.

The question I have is asking me to write a descending F major scale on the bass clef but the B flat note is on a ledger line. Do I put an accidental in front of it or not?enter image description here

Thanks

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As soon as you get into harmonic and melodic minors, you have to use both key sig and accidentals! Sorry! – Tim 1 hour ago
    
Not sure that would be marked correct. Once a key sig is stated, there's no need to write in the accidental for the affected note/s. They're already flattened. At grade I it'll probably be allowed, but please check with teacher. Your 1st para. alludes to that. – Tim 1 hour ago
up vote 5 down vote accepted

When it comes to key signatures, the accidentals given apply to ALL of those notes, no matter the register. Thus ALL Bs will become B-flats with the given key signature, and so you don't need to add in that accidental.

(Interestingly, this is not true of lone accidentals! They only apply to that particular pitch in that particular register.)

And one last bit. You said:

I have learnt that you either use key signatures or accidentals when writing out a scale. Not both.

Later on, you'll learn that sometimes you'll need key signatures and accidentals. So just know that that's possible in the future!

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Hi Richard, Thank you for the quick response! That makes sense. Cheers! – Samuel Meddows 2 hours ago
    
Wish there was a term for the # and b in the key sig. 'cos they're hardly accidentals, are they? – Tim 1 hour ago

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