Scales with added notes

[Genesis]

What's the theory behind it? The SCOM solo's got E Harmonic with D, Yesterday's got B minor with G#, etc. Does anybody know? 

[Oddy]

Slash combines a lot of scales sometimes. switching them up on the fly.

there's a D in E pentatonic minor, which is the basis for most of the SCOM solo. He only uses harmonic minor briefly in that fast run with the wah. Borrowing notes from other scales is a common thing to do.

[Genesis]

Slash combines a lot of scales sometimes. switching them up on the fly.

I'm not talking about switching scales. I'm talking about when he uses one scale for a solo, but with a particular note added, that doesn't belong to the scale...

there's a D in E pentatonic minor, which is the basis for most of the SCOM solo.

Not to be an asshole, but E harmonic doesn't have a D, it has a D#.
E harmonic = E F# G A B C D#

[Oddy]

ok maybe you misunderstood me.

he combines scales. the song SCOM is in the key of D. the first part of the solo is in E harmonic minor. he only hits a D once and its for a very short time and its a bend up to E anyway so it doesnt sound out of place. The theory is that yes you can stay in one scale, but you can add notes that are outside the scale just fine if they're still in key of the song.

On that harmonic minor run with the wah......he adds a few D's at the end because hes moving to E pentatonic minor, which as i stated......does have a D in it

E G A B D

after the fast run and the wah pedal is on.......those are the only notes he hits. for the rest of the solo that is all.

E pentatonic minor works over the song in the key of D major because

D major is

D E F# G A B C# D

so E pentatonic minor is like a shorter version of it.

i explained this as if it were in standard tuning so yeah.

were you under the impression that the whole solo was in E harmonic minor? cuz even during the E harmonic minor parts he only uses D for like a split second its not a big deal.

[Oddy]

and with yesterdays g# is just a passing tone. just gives it that bluesy sorta sound. notice he only goes through G# to get to the next note in the scale. if he were stay on G# too long it wouldnt sound too good as it would create dissonance. but dissonance is wat the blues is about so it works.

another explanation is during that part of the solo Slash is doin his usual E minor pentatonic stuff. G# belongs to the E major scale. Playing pentatonic minor and borrowing notes from major and vice verca has been done on guitar for ages.

listen to Shook me all night long by AC/DC. Angus usually always plays in Pentatonic minor but he throws in notes from the major scale seemlessly to make it work. this song is an example of that.

don't get too fussy over this sorta stuff. just play guitar and have fun dont worry about this sort of stuff.

[Genesis]

Fuck! Not only did i misunderstand u completely, everything i've been looking for is in these two posts 
Thx, but i've some questions though:

and with yesterdays g# is just a passing tone. just gives it that bluesy sorta sound. notice he only goes through G# to get to the next note in the scale. if he were stay on G# too long it wouldnt sound too good as it would create dissonance. but dissonance is wat the blues is about so it works.

But how'd he know to add G# and still make it sound good? Given a particular key, what scales and notes can i play and still sound in key?

Slash is doin his usual E minor pentatonic stuff. G# belongs to the E major scale.

Okay, here's what i think... The Yesterday's solo has the following notes: B C# D E F# G G# A, which is B minor+G#.
Ho'wd u decide that it's in Em Pentatonic?

don't get too fussy over this sorta stuff. just play guitar and have fun dont worry about this sort of stuff.

Yeah, i know but I'd like to learn the how's first! 

[jrs2001_99]

Listen to the rhythm guitar if you're having trouble understanding where the leads are coming from.

Take Yesterdays for example. The chords behind the solo start off with Bm G Bm G, which is where the Bm pentatonic scale is used. The next part of the solo goes Bm C#m Dmajor Emajor, which finishes off the solo before dropping back down to Dmajor for the start of another verse.

Now essentially, the solo segment is in the key of Bminor, but when you bring chords in that aren't naturally part of that key i.e. C#minor and Emajor (the main chords one would naturally associate with the key of B minor are B minor , D major, E minor, F#minor, G major, A major), then you need to alter the scale you're playing your solo in to accommodate the change of key in the rhythm.

You'll notice that this seemingly stray G# note that appears in the solo is played only over the Emajor chord at the end of the solo (Slash plays the same little 3-note rake that he plays in the Don't Cry solo as well). As Oddy said, the G# note is part of the E major scale, so it works perfectly over an E major chord. During this held Emajor chord Slash flits between the Emajor scale and Eminor pentatonic, before resolving the solo in a D, just when the rhythm guitar changes back to the key of D for the next verse.

The same theory applies at points of SCOM. During the slow part of the solo, the sustained Eb notes are only ever played while Izzy plays a B7 chord in the rhythm.

It's very easy to get hung up on this kind of thing, asking about the theory behind each individual note. Don't worry about it too much, with practice and experience you'll develop instinctive "rules" about what you can and can't do within the context of a song. My advice definitely is to listen closely to the rhythm guitar first before trying to understand the solo - listen out for the obvious key changes and take it from there 

Good Luck 

[Oddy]

Fuck! Not only did i misunderstand u completely, everything i've been looking for is in these two posts?
Thx, but i've some questions though:

and with yesterdays g# is just a passing tone. just gives it that bluesy sorta sound. notice he only goes through G# to get to the next note in the scale. if he were stay on G# too long it wouldnt sound too good as it would create dissonance. but dissonance is wat the blues is about so it works.

But how'd he know to add G# and still make it sound good? Given a particular key, what scales and notes can i play and still sound in key?

Slash is doin his usual E minor pentatonic stuff. G# belongs to the E major scale.

Okay, here's what i think... The Yesterday's solo has the following notes: B C# D E F# G G# A, which is B minor+G#.
Ho'wd u decide that it's in Em Pentatonic?

well the solo is in B minor yes.......but you could also look at it as D major. The reason Slash uses Em pentatonic so much is that it can be used over several keys. Do you know your modes? Because he's using E Dorian there (a minor scale) and adding in the G# like jrs2001 said over the E major chord.

jrs2001 said it best. read his post. what notes you can add depend on what the rhythm guitar is playing and the key of the song itself.

[Genesis]

Thx all.