[zao_89]

Can someone explain them to me?

Guitar Pro says: "The semi harmonic is similar the pinch harmonic, only you keep the natural resonance of the string in addition to the harmonic." Which doesnt give much detail.

 

[Coustfan'01]

It's kind of a semi-successful pinch harmonic , I think . (seriously)

 

[violation]

Yeah, that's what it is as far as I know... only time I can do it is by accident.