Audio manufacturers
- Stefan Semmlinger
- Steinberg
- Steinberger Guitars
- Steinway & Sons
- Stentor
- Sterling by Music Man
- Steven Slate Audio
- Stokyo
- Strandberg
- Strymon
- Studio 49
- Studio Projects
- Studiologic
- Stylophone
- Sugar Bytes
- Suhr
- Suonobuono
- Supercritical Synthesizers
- Superlux
- Supro
- Surfy Industries
- Suzuki
- Svetlana
- Swiff Audio
- Synapse Audio
- Synchro Arts
- Synclavier
- Synco
- Synergy
- Synthstrom Audible
- Syrincs
- T-Rex
- TAD
- Takamine
- Tama
- Tannoy
- TAP
- Tascam
- Taylor
- Taylor Trumpets
- tc electronic
- TC-Helicon
- Tech 21
- Technics
- TEControl
- Teenage Engineering
- Tegeler
- Telefunken
- Telex
- Telycam
- Tentacle Sync
- Terre
- The Hit Factory Plugins
- thingyfab
- Thomas Stöhr
- Thore
- Thorens
- Thorn
- ThorpyFX
- Three-Body Technology
- TIE Studio
- Tight AV
- Timberline Guitars
- Tiptop Audio
- Tobias
- Tobinski
- Tokyo Dawn Labs
- Tone City
- Tone King
- Tone2
- Tonelux
- Toontrack
- Topstar
- Torillo
- Torso Electronics
- TouellSkouarn
- Trace Elliot
- TrainYourEars
- Traps
- Traveler Guitar
- Trident Audio
- TritonAudio
- Truetone
- Tsakalis AudioWorks
- Tube Amp Manufactur
- Tube-Tech
- Tubesteader
- Tula Microphones
- Tuned Plugins
- Tung-Sol
- Turbosound
- TW AUDiO
- Twisted Electrons
- Two Notes
- TWS
- u-he
- UDG
- UDO Audio
- Udo Roesner
- Ufip