Voix céleste

'heavenly voice') is an organ stop consisting of either one or two ranks of pipes slightly out of tune.

It is designed to be used in conjunction with a stop of similar tonal quality of its own, normally a Viola da gamba or Salicional.

When both stops are played together an undulant, warm sounding string effect is generated.

Frequently, both ranks of pipes required are placed on the same stop knob, and it is labeled as "Voix Celeste II".

The Voce Umana is an Italian variant of the celeste employing Principal pipes.