As I understand it, the Pentatonic scale is a subset of the Chromatic scale. It has five notes, hence its name. The Major scale has seven notes from the Chromatic scale. I don't have a guitar to hand but I am presuming the notes of the Pentatonic scale are also part of the Major scale. If so why do we guitarists limit ourselves to five notes?
If I have this wrong, please point it out to me. Confused but eager to learn something new each day. Thanks.
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If I was playing a minor chord progression then I'd be mixing minor pentatonic, aeolian mode, dorian mode as a default position.
You can use passing notes, you can superimpose chords, or use arpeggios, or chord substitutions in your playing.
The important thing is to do it well and there is the rub.
Start with minor pentatonic because it is the least complex.
It has taken me years to be able to seamlessly switch from one scale to another in a musical way.
The trap that most people fall into is, because they don't work at it, they end up stuck in minor pentatonic in the root position and their playing can end up one dimensional.
Don't be one of those players.
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For me, when I'm soloing in major or minor, I will go for the straight major or minor scale and play as melodically as my brain will let me. I will switch to pentatonic if I feel it needs more "character" for want of a better word. It seems to add aggression in minor and a bit of quirkiness in major. Thats my take.
Like any scale, it has a sound. It's to be used in whatever way you want to use it as long as it fits. It's also a good fall back when your brain stops working or you get a bit lost on the fretboard as I do alot.
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You're right when you say "why limit yourself to five notes", but then again why limit yourself to seven notes from the diatonic scales? The answer is that just because you have 12 notes in our instrument, it doesn't mean we have to use all of them, and if you reduce to 7 usable notes, then you can also reduce to 5.
This is not entirely random either. The major scale has 2 "avoid" notes which are hard to make them sound good, and those are the 4th and the 7th, so F and B in C major. The major pentatonic doesn't have those notes at all. So you can see why soloing in major pentatonic would be easier compared to having the full scale.
I don't and the people I look up to don't either! But sometimes it's really convenient like if you're in a jam and you're not sure what key you're in, then the less information you put in your solo, i.e. the more you restrict your note choice, the less likely you are of screwing up.
You can also use it as a guide to planning your solo. For instance if you decide to only play pentatonic in the first few bars and then build it up to the full scale later on.
Solo'ing with the basic pent notes in a minor key can sound OK but in a major key you need to make a couple of nods to the major third here and there ..... you can cheat and move your pent box down a tone and half ........ so solo'ing in F# pentatonic over a song in the key of A major will sound very major-ish ..... for G use Em, for D use Bm etc . That little trick can make you sound more interesting in major key even if you don't know the notes you need to know as the box positions are the same
As you develop though you will want to break out of the boxes.
saying that this is a great video that may explain why the Pentatonic is so powerful.
https://www.youtube.com/watch?v=ne6tB2KiZuk
As you start to add in the missing two notes to make the diatonic scales (adding the 4th and 7th to major penta, or the 2nd and 6th to minor penta), you are adding more spice and therefore able to say more.
Major penta:
Add P4 & M7: major scale: happy or settled
Add aug4 & M7: lydian: cool and a bit naughty
Add P4 & m7: mixolydian: solid and strong
You can also add aug4 and m7: overtone scale (a mode of Melodic Minor - a different family of scales altogether).
minor penta:
Add M2 & m6: aeolian. Mournful yet beautiful
Add M2 & M6: dorian. Sad but quirky or hopeful
Add m2 & m6: phrygian. Mysterious, full of eastern promise
You can also add m2 and M6: phrygidorian scale (also a mode of Melodic Minor).
Supportact said: [my style is] probably more an accumulation of limitations and bad habits than a 'style'.
Also by using the minor pentatonic for e.g. up a 4th or 5th you are adding other notes not in the standard pentatonic scale
So over Am ...try Dm and Em. .or up a whole step Bm...or Bm pentatonic over a C maj7 chord ...then things get interesting and that's really just scratching the surface
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Supportact said: [my style is] probably more an accumulation of limitations and bad habits than a 'style'.
Tons of music all over the world, not just Western music, uses pentatonic scales; they existed long before the guitar was invented!
There are probably a ton of great tunes still to be written using pentatonic scales.
Whether you want to use them to improvise or not should simply be an "artistic" choice on your behalf, no more no less.
I do think, though, that the other things mentioned may be more to do with the reason a lot of guitar players stick to pentatonic scales - it's the first thing they learn that allows them to solo without hitting a wrong sounding note and then they get lazy with learning or fear coming out that safety box where they might hit a wrong note.
The best books I ever read on pentatonics are Jason Lyon's Pentatonic and Hexatonic Scales in Jazz Improvisation, and Jazz Pentatonics by Bruce Saunders.
Both books overlap a little bit. Jason Lyon's book has standard notation and Bruce Saunders's book has tab. The notation is easy to follow in Jason Lyon's book. If you want to get deeper into pentatonics then these are the books to read.
I do find it interesting that pentatonic scales seem so prevalent in music around the world though.
I think the propensity of the pentatonics has a lot to do with the consonance of it (as others have alluded to). By omitting the notes that introduce dissonance you allow the melody construction to fit consonantly with the harmony.
I'm the opposite of most guitarists (I'm a bass player by trade); I'm more of a modal player than a pentatonic guy so I'm currently working my way through Dan Greenblatt's 'The Blues Scales: Essential Tools for Jazz Improvising' since I feel like there's a whole tonality that I'm missing out on. I'm sure you guys know but the blues scales are major and minor pentatonics with a chromatic note of a minor 3rd (major pentatonic) and b5 (minor pentatonic).