What term is used to describe musical traditions in which the music is not written down, but is transferred directly from one person to another, from one generation to the next?

Ibelieve so yes. the industry for electric guitars (such as gibson, fender, prs, epiphone,ect) has went down over the past few years so i feel things will come back up for the vintage style electric guitar (such as the gibson les paul, fender stratocaster/ telecaster, gibson sg, gibson flying v,) so i feel like they will be bringing more vintage style instruments to the stage-jaydoe

The answer is going to be triad. hope that