| ADSR | STK ADSR envelope class |
| Asymp | STK asymptotic curve envelope class |
| BandedWG | Banded waveguide modeling class |
| BeeThree | STK Hammond-oid organ FM synthesis instrument |
| BiQuad | STK biquad (two-pole, two-zero) filter class |
| BlowBotl | STK blown bottle instrument class |
| BlowHole | STK clarinet physical model with one register hole and one tonehole |
| Bowed | STK bowed string instrument class |
| BowTable | STK bowed string table class |
| Brass | STK simple brass instrument class |
| Chorus | STK chorus effect class |
| Clarinet | STK clarinet physical model class |
| Delay | STK non-interpolating delay line class |
| DelayA | STK allpass interpolating delay line class |
| DelayL | STK linear interpolating delay line class |
| Drummer | STK drum sample player class |
| Echo | STK echo effect class |
| Effect | STK abstract effects parent class |
| Envelope | STK envelope base class |
| Filter | STK filter class |
| Flute | STK flute physical model class |
| FM | STK abstract FM synthesis base class |
| FMVoices | STK singing FM synthesis instrument |
| FormSwep | STK sweepable formant filter class |
| Function | STK abstract function parent class |
| Generator | STK abstract unit generator parent class |
| HevyMetl | STK heavy metal FM synthesis instrument |
| Instrmnt | STK instrument abstract base class |
| JCRev | John Chowning's reverberator class |
| JetTable | STK jet table class |
| Mandolin | STK mandolin instrument model class |
| Mesh2D | Two-dimensional rectilinear waveguide mesh class |
| Messager | STK input control message parser |
| MidiFileIn | A standard MIDI file reading/parsing class |
| Modal | STK resonance model instrument |
| ModalBar | STK resonant bar instrument class |
| Modulate | STK periodic/random modulator |
| Moog | STK moog-like swept filter sampling synthesis class |
| Mutex | STK mutex class |
| Noise | STK noise generator |
| NRev | CCRMA's NRev reverberator class |
| OnePole | STK one-pole filter class |
| OneZero | STK one-zero filter class |
| PercFlut | STK percussive flute FM synthesis instrument |
| Phonemes | STK phonemes table |
| PitShift | STK simple pitch shifter effect class |
| Plucked | STK plucked string model class |
| PluckTwo | STK enhanced plucked string model class |
| PoleZero | STK one-pole, one-zero filter class |
| PRCRev | Perry's simple reverberator class |
| ReedTable | STK reed table class |
| Resonate | STK noise driven formant filter |
| Rhodey | STK Fender Rhodes electric piano FM synthesis instrument |
| RtAudio | Realtime audio i/o C++ classes |
| RtAudioDeviceInfo | The public device information structure for returning queried values |
| RtDuplex | STK realtime audio (blocking) input/output class |
| RtError | Exception handling class for RtAudio & RtMidi |
| RtMidi | An abstract base class for realtime MIDI input/output |
| RtMidiIn | A realtime MIDI input class |
| RtMidiOut | A realtime MIDI output class |
| RtWvIn | STK realtime audio (blocking) input class |
| RtWvOut | STK realtime audio (blocking) output class |
| Sampler | STK sampling synthesis abstract base class |
| Saxofony | STK faux conical bore reed instrument class |
| Shakers | PhISEM and PhOLIES class |
| Simple | STK wavetable/noise instrument |
| SingWave | STK "singing" looped soundfile class |
| Sitar | STK sitar string model class |
| Skini | STK SKINI parsing class |
| Skini::Message | A message structure to store and pass parsed SKINI messages |
| Socket | STK TCP socket client/server class |
| Sphere | STK sphere class |
| StifKarp | STK plucked stiff string instrument |
| Stk | STK base class |
| StkError | STK error handling class |
| StkFrames | An STK class to handle vectorized audio data |
| SubNoise | STK sub-sampled noise generator |
| Table | STK table lookup class |
| TcpWvIn | STK internet streaming input class |
| TcpWvOut | STK internet streaming output class |
| Thread | STK thread class |
| TubeBell | STK tubular bell (orchestral chime) FM synthesis instrument |
| TwoPole | STK two-pole filter class |
| TwoZero | STK two-zero filter class |
| Vector3D | STK 3D vector class |
| Voicer | STK voice manager class |
| VoicForm | Four formant synthesis instrument |
| WaveLoop | STK waveform oscillator class |
| Whistle | STK police/referee whistle instrument class |
| Wurley | STK Wurlitzer electric piano FM synthesis instrument |
| WvIn | STK audio data input base class |
| WvOut | STK audio data output base class |