Riff, melody, chord progression?

[clifford]

I've been pondering this for a long time now...

whats the difference between a riff, a melody, and a chord progression?

i'm pretty sure that the three can overlap, ala Hendrix 'chordal melodies', a chord based riff, a melodic riff...
but what are the accepted definitions? those three terms just confuse me..

[TheWizard]

guh............................................... ........(drools)

[clifford]

anyone?

[hot_rats!]

i think this is right:
if the progression is 1-4-5 in E minor,
then the chords are Eminor to Aminor to Bminor

in stead of playing chords you could play a riff then move that around to the chords
eminor================aminor==============bminor
e--------------------------------------------------------------------------------------------------
b--------------------------------------------------------------------------------------------------
g------------------------------------------------------------------------------4-4-4-6-4-4-6-7-6-4-6-4
d----------------------------------------7-7-7-9-7-7-9-10-9-7-9-7-------------------------------
a-7-7-7-9-7-7-9-10--9-7-9-7-0-0-0-0-0-0-0--0--0-0-0-0-2-2-2-2-2-2-2-2-2-2-2-2
e-0-0-0-0-0-0-0--0--0-0-0-0-----------------------------------------------------------------

then the molody is the part i guess the lead guitar plays over either the chords or the riffs
this is finger tapped on the b string:
eminor================aminor=================bmino r
b-17-12-8-17-12-8-17-12-8-17-13-10-17-13-10-17-13-10-19-15-12-19-15-12-19-15-12

ok that should sum it up, the melody can be alot simpler but usually consists of notes in the chord

the edits were just to put the tabs right.