I know that in a normal way we have like this:

I Mayor
II Minor
III Minor
IV Mayor
V Mayor
VI Minor
VII Diminished (holy cow i don't know how to write it in english in spanish is disminuido hahaha)

So when people talk about substitions of chords I know they change this so they can take chords of other root tones.

So someone can tell me what are the most commun subtitions for chords??

Do you mean, for example, "what can I play instead of a G Major?" or are you talking about jazz stuff like the tritone substitution?

More like the first one I think hahaha, i mean no adding 7 or 9 or etc, well let's say I use a E instead of the Em been on C mayor tone, so that would send me to other place maybe using an A armonic minor; it's hard for me to explain it... i saw some of thise on dave's weiner riff of the week but couldn't understand it completly.

If you have changed your chord from Em to E which im presuming you mean E7 or dominant or E major, then you have changed key completely.

For example, if you have Em as the only chord in the song, you could play G major over it. But if you change that Em to Emajor then you cant play G major. It would be either G dorian or G phrygian i cant remember..

Phry am i correct dorian or phrygian i always forget :P

hoiguy, it would certainly help me if you could link (or copy) the Dave Weiner article here.

SirChick it would be G# Phrygian

Sorry phy i forgot to put the link here it is:

substitutions

damn i was close ;)

@hoiguy - sorry, i've been really busy lately... will hopefully check the link tomorrow morning. if i haven't replied in say three days remind me, please!

@sirchick - you're getting there :)

hoiguy, I'm still not able to spend any amount of time on this BUT Dave has a PDF on his site with some really good explanations

http://www.daveweiner.com/rotw.html

Go to that page and click the TAB link (far right) on the row that says

1/3/07 "SOLOING OVER ADVANCED CHANGES"

Hope this helps!

thanks phry I will take a look to that, as soon as i can... i've been rally busy lately too, but I will read and talk to you later, thanks mate

Em and Emaj share the same tonic, therefore they are parallel keys, pretty much the same principle as the "Pitch Axis Theory". This is what Dave Weiner is talking about. To substitute the Minor 5th in a minor progression to a dominant 5th is pretty standard practice. It is also standard practice to "spice up" the dominant by making it an 'altered dominant' chord, in this case Weiner sharpens the 5th giving an augmented tension to the chord.

Dave talks about using a harmonic minor scale over this chord, but I would personally choose a Super Locrian (Locrian b4) mode, or the Lydian Augmented (Lydian #5), which both derive from the melodic minor scale. it just sounds more exotic and interesting to my ears.