Julien Desgranges: bass clarinet, Artistic Director
Kanako Ono: piano
Transcription for B-flat bass clarinet: Julien Desgranges. Many thanks to Stanislas Kuchinski for publishing and transcribing the score and for his help in making the video.

Link to download full clarinet part with special fingerings designed by Julien for the high register.
https://www.kuchmasterpublishing.com/en/store/julien-desgranges-collection/franck-sonata---julien-desgranges-collection

Julien Desgranges is Principal bass clarinet at "Orchestre de Paris". He plays the B40 mouthpiece with V•12 reeds #3.5 and the OPTIMUM ligature