Yamashita: Multi-string tremelos

This family of Right Hand techniques enables the guitar to simulate a string section, with a gentle swelling of sound on 2, 3 or even 4 voices. I have managed to integrate the use of the index finger tremelo into my playing, but Yamashita has a whole repertoire of these tremelos using apparently any of the 4 right hand fingers that the arrangement and fingering require.

Yamashita often maintains a multi string tremelo whilst playing different textures with the other fingers.

Kazuhito Yamashita demonstrating Multi-string tremelos