Gioacchino Rossini dedicated this piece to a deceased friend. He would certainly be touched by the sound of his composition in this instrumentation. Minimalist melancholy and passion ring out, a touch of opera is in the air...
The sheet music includes the score and individual parts, with the double bass part being available for both the orchestral bass and the bass in solo tuning.
You can get an impression of the beauty of this piece on Youtube, recorded with the arranger Timo Hoppe on the double bass (https://youtu.be/ZRpnNm2MpdE).