A cellist himself, Klengel knew exactly what pieces would help young cellists perfect their technique in a casual yet musically demanding manner. And since Klengel was blessed with a great deal of imagination, he wrote many of his pedagogical pieces himself.
The Three Pieces Op. 62 are technically demanding. This group, which Klengel composed in the last years of his life, contains atmospherically enchanting trios. They are also ideal for church concerts when the organ is used as the keyboard accompaniment.