One of his contemporaries described his playing as having Clementi's evenness and clarity in rapid passages as well as the quality of sound, the manner of phrasing, and the ability to make the instrument sing characteristic of the school of Hummel and Moschelès.
Living in an age of garish virtuosity, and hailed as a brilliant executant himself, he maintained nevertheless the most rigorous standards of musicianship in his playing, in his compositions, and in the music which he appeared before the public to interpret.
This is the more remarkable when one considers that his manhood was reached during the luxuriant period of French romanticism and that the extravagances of the literary outburst were reflected in the musical movements of the time.
His life was singularly devoid of incident and official distinction, but the legacy of pedagogic works which he has left to us and his honorable activity give it every right to be called a success.
[5] Antoine Marmontel, who devoted the second chapter of his work on celebrated pianists to Bertini, wrote He was unsurpassed as a teacher, giving his lessons with scrupulous care and the keenest interest in his pupils' progress.
He continues: "With the best will in the world, we find it difficult to be angry with Bertini, yet he drives us to distraction with his perfumed Parisian phrases; all his music is as smooth as silk and satin.
The Nonetto opus 107 for flute, oboe, bassoon, French horn, trumpet, viola, cello, double bass, and piano, composed in 1835, is one of Bertini's major works.
Amongst other movements, this Nonetto includes an adagio entitled La Melancolie which provides more than its title might indicate; it is so grandiose, at times so majestically sombre, that the sentiment of melancholy one expects is overshadowed by ideas of a much higher and rare order.
In the Scherzo and Finale one finds details of graceful melancholy as well as vivacious charm, but the Adagio rises up in the centre of the work like the Mont Blanc among its neighbouring peaks; it dominates all; it is a sublime and profound meditation which provides an almost painful impression that cannot be forgotten.
Berlioz later made further comments about this evening in the July 6 edition of Le Journal des débats: The Nonetto by Bertini... is the work of a great musician with a lively and ardent imagination, who will grow stronger and more powerful if he refrains from his attempts to encourage applause as he occasionally sought to do in the first movement.
In composing these the author, fully involved in his subject, undoubtedly forgot that he was actually writing for his public, and concerned himself only with the task at hand and the ultimate unity of the work.