If you’re a guitarist you will need to download this. “Graillon is a new kind of voice octaver that tracks pitch frequency and mixes frequency-shifted copies of the input voice with itself. Octave Forge is a central location for collaborative development of packages for GNU Octave. However, Notepad++ is a free and open text editor designed specifically for programming, and it supports syntax highlighting for both Octave/MATLAB and LaTeX. Particle pitch-shifting / detuning / octave unit: octave down, normal, octave up.octave plugin download Latest package release.