Which term is used for software that generates sounds mimicking real instruments?

The term "virtual instrument" specifically refers to software that emulates real musical instruments, allowing users to create sounds that resemble acoustic or electronic instruments without the need for physical instruments. Virtual instruments can simulate the timbre and playability of traditional instruments like pianos, guitars, and orchestral elements, providing musicians with a broad range of sounds to work with in a digital environment.

In contrast, music production software encompasses a wide range of functionalities, including sequencing, arranging, and mixing, but it is not limited to generating sounds. Sound design software typically focuses on creating new sounds from scratch rather than imitating existing instruments. Audio recording software primarily deals with capturing and editing audio, which may include recordings of real instruments but does not inherently generate instrument sounds itself. Thus, "virtual instrument" is the most precise term for software dedicated to generating sounds that mimic real instruments.