Selig Audio is a developer of audio plug-ins and Rack Extensions for Propellerhead/Reason Studios' Reason DAW, founded by Giles Reaves, a longtime audio engineer and producer. The company operates in association with Pitchblende, with David Brown of Pitchblende handling much of the coding work behind the products.

Its catalog focuses on mixing and mastering utilities built specifically for the Reason rack, including the Leveler (an upward-compression dynamics processor), Infuser (a low/high-end enhancer), ColoringEQ (a seven-band saturating equalizer), DeEsser, Gain (a metered VCA-style level utility), NoteView (a MIDI note viewer and transposer), and ReMark (a rack labeling and organization tool). The line targets working Reason users looking for refined, transparent processing alongside more colored, character-driven options.

Selig has 3 products cataloged on Equipboard, including Dynamic Processor Plugins, Vocal Processing Plugins, and Mastering Plugins. Their gear is featured by 1 artist, with the strongest followings in Electronic and Pop. Notable users include Jacob McDonnell.