Variety Of Sound (often abbreviated VoS) is a freeware audio plugin project by German developer Herbert Goldberg, who releases under the alias "Bootsy." Based in Frankfurt, Germany, Goldberg is a computer scientist and musician who designs DSP algorithms and VST effects as a non-commercial endeavor, releasing the plugins free of charge through his WordPress site.

The VoS catalog focuses on analog-modeled processors and includes equalizers (BootEQ MkII, baxter EQ), compressors and channel strips (Density MkII, NastyVCS), saturation and tape emulation tools (FerricTDS, ThrillseekerLA, the TesslaPro and TesslaSE saturators), reverb and delay (EpicVerb, NastyDLA), and the NastyLF/NastyHF tone shapers. Goldberg also collaborated with Tokyo Dawn Records on the widely used SlickEQ. The plugins were originally Windows-only 32-bit VST releases, with 64-bit versions following later.

Within the home recording and mixing community, Variety Of Sound is known for offering character-driven processors with a workflow and sound aesthetic comparable to commercial analog emulations, despite being distributed at no cost. The plugins have a long-standing reputation on forums such as Gearspace and KVR Audio as go-to free tools for adding warmth, harmonic content, and vintage-style coloration to mixes.

Variety Of Sound has 1 product cataloged on Equipboard, including Saturation Plugins. Their gear is featured by 1 artist, with the strongest followings in Electronic. Notable users include Insan3lik3.