Reasonable people will think that it's a crazy idea to play some Vierne on the Riepp. That's true but :
- Riepp's flutes are, IMHO, perfect for this piece ;
- the vox humana makes quite a convincing clarinette that doesn't betray the atmosphere of the two rough intermediate sections.
True there is no swell-box but, IMHO again, it's here less essential than in other Vierne's pieces.