If you are constructing the solo, it can be anything u want it to be as long as you like it. "Sounds good" is a very loose term. It could mean differetly to different people... So, lets just say that solos based entirely on one scale sound fairly accurate, but many people mix scales in their solos and these combinations sound even better. but if u r a beginner and are making ur own solo, then u should stick to the same scale... tho, if u have so many questions about scales, i think it is better for u to know more about them before attempting to compose your own solos...
if i'm constructing a solo, then does it HAVE to be in a particular scale or can i just make anyting that ''sounds good''.
Major chords are made by playing the 1st, 3rd and 5th notes of the respective major scales. So, a chord is always contained within a scale whereas a scale is not contained entirely within a chord... so if u replace say C MAJ chord with say, the notes A, E, B, C, E which belong to the C MAJ scale, but it will give u a completely different chord (Am)... So, don't think so deep into it right now... just let your ear judge whats right and let your brain rest while you play.
The words of a banished king
"I swear revenge"
Filled with anger aflamed our hearts
Full of hate full of pride...
Oh, we screamed for revenge
- Blind Guardian (Nightfall)