The Low C bass clarinet manufacturer tells you that the bass clarinet has a range of over 3 octaves, and modern improved versions can play closer to 4 octaves. Applications of the Bass Clarinet. The Low C bass clarinet manufacturer tells you that since the invention of the bass clarinet in the early 19th century, its use has become increasingly common. From the mid-to-late nineteenth century to the twentieth century, there were more and more related repertoires that even appeared in chamber music and solo repertoire. Now, its application extends to jazz, film scores, and clarinet ensembles.

The Low C bass clarinet manufacturer tells you that the bass clarinet is an instrument of the clarinet family. Like the more common soprano B♭ clarinet, usually B for ♭ (indicating that this is a transposing instrument and the C written on it sounds like a B♭).
The Low C bass clarinet manufacturer tells you that the clarinet also has bass in other keys, especially C and A, but is very rare (as opposed to the regular A clarinet, which is common in classical music). The bass clarinet performs regularly in orchestras, orchestras/concert bands, occasionally in bands, and occasionally plays solo roles in contemporary music and jazz.
The above is the Low C bass clarinet manufacturer's introduction and analysis of the keys and range of the bass clarinet, hope it helps you.