Xander Kok-Roberto | Jazz Guitar Student

This page documents the musical development and progress of my jazz guitar student, Xander Kok-Roberto.

Here I share selected lesson videos, performance clips, and musical milestones that reflect his growth as a guitarist and improvising musician.

Our work focuses on developing core jazz guitar skills: harmony, improvisation, rhythm, repertoire, technique, and practical musicianship — with the goal of building a strong musical foundation and artistic independence.

Classical Guitar Technique on Electric Guitar | Aguado's Arpeggio Study #2 |Xander Kok-Roberto 

Meet Xander — this is his first-ever solo guitar recording. No backing track, no accompaniment, nothing to hide behind — just the guitar, and plenty of dedicated work.

A little context: I love bringing classical guitar repertoire into lessons with my electric guitar students, because classical guitarists have spent 200+ years refining technique of playing the instrument, while electric guitar is a much younger instrument that simply hasn't built up that same depth of inherited knowledge yet. So instead of reinventing the wheel, why not borrow from what already exists, adapt it to the electric guitar, and build the fundamentals every player needs?

The piece in this video is Arpeggio Study #2, also known as "Estudo de Arpejo, EL2," borrowed from the famous Brazilian classical guitarist and educator Edson Lopes, based on a study by the 19th-century goat of classical guitar technique, Dionisio Aguado.

The left hand barely moves in this piece — the real challenge lives entirely in the right hand, which is exactly the point.

So I set Xander a challenge: record the same piece using three different picking techniques every electric guitarist should know. Same notes — completely different color and character each repetition.

Lesson Video #1 — “Airegin” by Wes Montgomery

In this video, Xander and I play “Airegin” by Wes Montgomery.

As part of this project, Xander transcribed the entire solo by ear and learned it by heart — an important step toward developing real musical understanding, stronger ears, and deeper connection to the jazz language.

This is a typical lesson format at Groningen Guitar Lab: the student presents prepared material, we work on details and weaknesses, and finish by making music together.