Malibran's tessitura (comfortable vocal range) was remarkably wide, from G below middle C to high E (G3 – E6),[6] and her extreme range extended from D3 to F6 in altissimo,[7][8] which allowed her easily to sing roles for contralto as well as high soprano. Her contemporaries admired Malibran's emotional intensity on stage. Rossini, Donizetti, Chopin, Mendelssohn and Liszt were among her fans. The painter Eugène Delacroix however, accused her of lacking refinement and class and of trying to "appeal to the masses who have no artistic taste." Describing her voice and technique, French critic Castil-Blaze wrote, "Malibran's voice was vibrant, full of brightness and vigor. Without ever losing her flattering timbre, this velvet tone that has given her so much seduction in tender and passionate arias. [...] Vivacity, accuracy, ascending chromatics runs, arpeggios, vocal lines dazzling with strength, grace or coquetry, she possessed all that the art can acquire."[6]