You are probably used to my unusual titles; here is an improv where I couple the 3 string stops (8-8-4) of the two lower two manuals (HW and RW) to the Vox Humana (RW), together with the 2 trumulants dous; later I change a few things and end softly.
Most people add flutes to the Vox Humana, but I wanted to experiment with adding strings instead for a sharper sound, although the tremulants soften that effect a bit.