It’s hard to really say. A lot of my original songs were written on guitar pro. But I tried to paint a picture in my head with the guitar. Now I find myself just making things up through the theory I learn. I made up a song when I learned the caged system, and I think its one of my most melodic songs to date. Another song was made when I was just going through my effects on my new amp or new pedals I got. Most of them are now from just messing around. But, I still try to paint a picture if I have an idea.
The solo part, I write my solos last, unless they come to me. I’ll learn all the rhythm and lead parts. Then I’ll go over the track over and over, and try to improvise the solo. Sometimes, I get the idea right away and it works out the first time, but a lot of the time I have to do it a few times before I get something I really like. The solo to the caged system song took me about 3 weeks to get. I didn’t have any ideas at all until I got to the videos for modes. Then I was going over each scale, and I played out the solo and I got it right away the first time. And I remembered how to play it.. as that was at times an issue when improvising lol. Sometimes you just nail it, and then you cant do it again lol. As I’ve gotten deeper into theory I imagine this problem will go away fully. I have noticed my more recent riffs are beyond anything I ever wrote over my last 10 years playing. Crazy what a little inspiration and motivation can do.