For the commonly used fast root-octave patterns we often hear in disco style music like Canned Heat by Jamiroquai, what is the proper technique to do it fast and still getting a full tone.
Do you sustain the root note while plucking the octave note? Or you just mute the root when playing the octave?
Do you sustain the root note while plucking the octave note? Or you just mute the root when playing the octave?

