Vaughan has been on the Audacity Team since 2002, contributing effects, the timer record feature, GUI features, and improved error handling and history for effects. He also created custom versions of Audacity:
- For UmixIt, added a Lyrics/Karaoke window (with DominicMazzoni), added a Mixer Board view, per-project branding (logo, graphics, web links), and security enhancements to prevent virus transmission via maliciously modified project files.
- For Thinklabs, made a version of Audacity customized for phonocardiography analysis, for use with their electronic stethoscopes.
- For Audiotouch, made a version of Audacity customized for elementary school children.
Vaughan is a member of the Audacity Technical Leadership Council.