

The range of most contra-alto clarinets extends downwards to low E♭ (sounding contra G♭ 1). Today's contra-alto clarinets are mainly based on the Boehm system, although models with the German system also existed in the past. Ripamonti, Italian manufacturer: model 322 in rosewood, to d (written).Leblanc USA / Vito: Model L7181 in Reso-Tone material to E flat (written).

1968–1969): model 1440 made of ebonite, to written E♭ (written), with 18 keys and 7 plateau keys. Conn-Selmer USA (1980 onwards), Bundy (from 1970 to 1980), Buescher ( c.Model Prestige 1553 made of grenadilla, 19 keys.Metal model patented in 1891 for Evette and Schaeffer (patent FR218373/5).Model 26/40 in rosewood to written E, E♭, or D.Other makers of contra-alto clarinets have developed mainly stretched models. Model 352 was straight in a bass clarinet-shape to written low E♭. The curved shape makes the instrument much easier to transport than the traditional straight, non-dismantled model. These models also have three trill keys on the right side of the upper joint. Model 350 was in a curved shape (known as a paperclip) and went to written low C. Georges Leblanc Paris built two models of a contra-alto clarinet in E-flat, Model 350 and 352, from metal.Around 1880 the Italian clarinet maker Alessandro Maldura built a contra alto clarinet in E ♭ of grenadilla wood with 14 keys, 1.93 m long, which he called Clarone grande, exhibited at the 1881 Italian National Exhibition in Milan.The pitch of this instrument today identifies it as a contra alto clarinet. This is the case with a contra clarinet tuned in E♭, whose written lowest tone is the small E♭ (E-flat 3), as with most clarinets. In 1851, Adolphe Sax applied for a patent for an instrument, he called "contrabass clarinet in E♭" in order to replace the bowed contrabass of symphony orchestras in wind bands with an instrument whose lowest sounding note is contra-G or G1, like the contrabass.Albert also developed an alto clarinet in F, but without the additional basset notes typical of the basset horn notated C to it. Around 1890 the Belgian clarinet maker Eugène Albert or his son E.In 1829, Johann Heinrich Gottlieb Streitwolf, an instrument maker in Göttingen, introduced an instrument tuned in F in the shape and fingering of a basset horn, which could be called a contrabasset horn because it played an octave lower than it.The contra-alto clarinet is largely a development of the 2nd half of the 20th century, although there were some precursors in the 19th century: 5 CD recordings with contra-alto clarinet.4.2 Contemporary solo and chamber music.
