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How important it is to have 24 frets?

I ask for my Fender P-Bass is a 24 fret bass and we have at least one song where I use all 24 frets.

Which has got me thinking:

1. How many if much songs require you to have 24 frets?
2. Should I just go with the 5 string?
3. if I do #2 wouldn't having a 4 string and a 5 string make things complicated.

I am more stuck on the importance on having 24 frets.

I find the extra 21st fret on the stingray is perfect. Going from open e 3 octaves up saves having to bend up the 20th fret on Fenders. I always thought it was odd leaving out the 21st fret because it just makes sense.
 
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What is my purpose?

I selected bass guitar because of its function within the spectrum of sounds. Let's use the standard symphony for an analogy. There are four brass instruments beginning low to high: tuba, trombone, horn, trumpet. There are four strings going low to high: bass, cello, viola, violin. There are four winds: bassoon, clarinet, oboe, flute. Certainly their ranges overlap. And, their use isn't simply range since each has its own sound in particular comparing winds to strings to brass.

I don't think I will every ask myself if I will need 24 frets because my goal is not to get involved with those notes. I may someday ask myself if I need a 5 string so that I can get below E1, e.g. to play Mr. Mister Broken Wings without having to tune down to D.

I have already asked myself if I need a tweeter in my cabinet. One answer was "leave those frequencies for the guitars." If you play high on the neck you will need to make sure your sound system can keep up.
 
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I used to think that, but then I realized: 20 frets is the exact number necessary to give you 2 full octaves in every key.

If you have only 19 frets, you can't play a 2 octave Eb Major scale.

And if you have 21 (or more) frets, you can play 3 octaves in some keys, but only 2 octaves in other keys.

But if you have exactly 20 frets, then you can play 2 octaves in each of the 12 keys.

A lot of people think 20 frets was a random decision by Leo Fender. But there is actually a very logical musical reason. :)

I feel you can play two octaves in any key even with 9 frets. To share my feeling you would have to agree that sometimes notes are played below the root note. I think the definition of the key has more to do with the selection of the notes than it does with where you start singing "Do Ra Me..."

You can cover every note on the bass clef plus a few above and a few below. Setting the key by marking the sharps and flats doesn't change the useable range of notes that can be written.

Maybe Leo chose 20 frets because his kid's birthday was August 20th. Just a theory...
 
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I rarely play above the 12th fret but I like the extra fret set up to make the 12th through say, the 20th not so close to the body. Closer to the center for more comfortable access when needed.
 
I feel you can play two octaves in any key even with 9 frets. To share my feeling you would have to agree that sometimes notes are played below the root note. I think the definition of the key has more to do with the selection of the notes than it does with where you start singing "Do Ra Me..."

You can cover every note on the bass clef plus a few above and a few below. Setting the key by marking the sharps and flats doesn't change the useable range of notes that can be written.

Great point, and I agree with you. I was thinking (but did not explicitly specify) "two-octave scale, from the root to the second octave." If you don't start on the root then you are absolutely correct; you can play more than 2 octaves on a 20-fret, 4-string bass, in any key. :)
 
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Never predicted this thread go this far. Clearly there are those that have a lot more understanding of octaves and theory than me. Then again that isn't hard to surpass my knowledge. I really need to read that book.
 
I ask for my Fender P-Bass is a 24 fret bass and we have at least one song where I use all 24 frets.

Which has got me thinking:

1. How many if much songs require you to have 24 frets?
2. Should I just go with the 5 string?
3. if I do #2 wouldn't having a 4 string and a 5 string make things complicated.

I am more stuck on the importance on having 24 frets.
I'm not married to 24 frets on a 34" scale tuned to standard. However, if I am tuning to C or B, I want a 35" scale, which usually means 24 fret.
Fender will never do 24 frets or 35" scale on their general releases. That would be too 1.) Forward thinking; and 2.) cost them too much money since it isn't the same cookie cutter design they've been using for the last 60 years.
 
I'm not married to 24 frets on a 34" scale tuned to standard. However, if I am tuning to C or B, I want a 35" scale, which usually means 24 fret.
Fender will never do 24 frets or 35" scale on their general releases. That would be too 1.) Forward thinking; and 2.) cost them too much money since it isn't the same cookie cutter design they've been using for the last 60 years.
My Fender P-Bass I had for about 2 years has 24 frets.
 

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