Acoustic is a simple acoustic body resonator model, consisting of a first order mass-spring for modeling the Helmholtz or 'air' frequency, and a banded waveguide.... [more]

Aerophone models lip valve instruments with cylindrical bores such as trumpets and trombones. The lip valve is modeled with an oversampled 3rd order mass-spring to emulate expressive styles of brass performance. The elementary circuit is an effective platform for producing a range of emulative timbres, however to apply humanised performance values requires significant effort and knowledge on the part of the user.... [more]

arp4MIDI combines Chris Kerry's arpeggiator with contemporary synchronization functions, adding gate offset (e.g. early or late) host position based sync, and "lobster" ("humanize") functions. arp4MIDI includes arpeggiate and phrase modes and a 16 step sequencer assignable to gate or arpeggiator step. arp4MIDI is included when you purchase Talent. ... [more]

Boing2 is a physically modeled BOwed strING synthesizer. Oscillation is produced by a friction calculation applied to a dispersive waveguide string oversampled at rates of up to 16x. The string loop includes a mass-spring modeled bridge. The body resonator consists of a mass-spring modeled "air tone" and a 5 band banded waveguide.... [more]

Breath Cube employs the 'pop music generating' engine of Cube Breath and adds a 3-band synthetic voice to "challenge your listening skills".Breath Cube was created using SynthEdit and runs as a standalone with the included SAVIHost application or as a VST plug-in.The Breath Cube GUI features artwork by Shane Sanders.... [more]

Circuit creates rhythms by joining short phrases together. This is intended to produce more natural algorithmic sequences by evening the distribution of beats and rests. In Circuit, probability values are used to determine the pattern of phrases, and to translate the steps of each phrase into MIDI notes. Dynamic and complex sequences can then be produced by adjusting a few parameters or with modulation. Circuit has 4 sequencing channels that tap the same pattern, and a 3 stage counter for creating fills. The GUI includes performance oriented controls and enough modulators for automated applica... [more]

Cube Breath is a standalone application for Windows created with SynthEdit and SAVIhost, but will also run as a VST effect. It is a realtime, fully automatic pop music generator. Audio input is vocoded in tune with the music, allowing the user to "instantly transform their shopping list, answering machine messages or office memos into floor-filling number one hit singles".... [more]

Dystopia emulates the architecture of the hihat and cymbal circuit from the classic Roland TR-808 drum machine utilising Chris Kerry's low CPU "audio oscillator" module for SynthEdit. Complete documentation is included.... [more]

Fauna is a simple waveguide model of the vocal tract intended to provide a flexible platform for the synthesis of abstract and animal voices. Waveguide synthesis is a physical modeling technique that makes use of delay lines to model the transmission of acoustic vibrations. A sample rate of 44.1kHz translates to a distance of less than 1cm under normal atmospheric conditions, so modern computers can achieve a degree of accuracy in acoustic modeling. The delay bore is divided into five sections. Reflection coefficients control the transmission between segments, which effectively emulate the a... [more]

Friction is a physical modeling synthesizer designed to be applicable to a range of emulative tasks, and is suitable for budget foley production or experimental music. The architecture applies a friction algorithm to a 2nd order mass-spring, modeling the reactivity of surfaces in contact. Two waveguides are used to model the primary resonances of a physical object. The synthesis engine employs 4x oversampling, providing reasonable emulations of sounds produced by friction, such as squealing tires, squeaky hinges and wiping noises. Modulation consists of three 32-stage envelopes (designed by Ch... [more]

Horizon combines lush stereo unison voicing with a phrase sequencer that always stays in key when the sequence is transposed. Features: Two 32-voice oscillators with five stereo algorithms. 10 oscillator waveforms including 4 modulating contours (sine, saw, ramp, peak, triangle, square, curve, pulse-saw, sine-saw, res). Noise oscillator. Per voice distortion with 6 modes located before the filter. 2 stereo 6-pole filters running in serial or parallel. 3 tempo syncable LFOs (sine, triangle, ramp, saw, square, dip, hump, 4 curve modes, step rnd, smooth rnd). 3 envelopes. 9 modular destin... [more]

Hyperion is a semi-modular scaled algorithmic MIDI note generator suitable for a wide range of applications from live performance to automated composition. LFOs, sequencers and counters are used to easily create dynamic MIDI sequences and change them on the fly, or to modulate other components of the architecture. Hyperion produces glissandos or subtly varying sequences for up to three parts on three separate MIDI channels using a simple chord function. It can also be used as a phrase arpeggiator to make sure that you never play out of key or out of sequence. Hyperion's architecture is semi... [more]

Malt (or MIDI alt) uses an LFO to alternate between two MIDI channels. Thresholds applied to the LFO define when either or both of the channels are passed. Malt is designed to be used in algorithmic MIDI sequence paths.... [more]

Mass and Cymbal are percussion synthesizers that use mass-spring models to produce realistic dynamic and timbral effects. Boundary conditions imposed upon the movement of a multi-order mass-spring provide complex timbres that evoke common modes of vibration in acoustic forms. These models are augmented with conventional subtractive elements to comprise low-CPU solutions for improved realtime percussion synthesis. ... [more]

Midilegato delays NoteOff events on one channel by up to 500ms to turn generated MIDI sequences into legato sequences.... [more]

MiniSeries is a MIDI sequencer inspired by serial composition techniques. It is intended for rhythmic and experimental applications and geared towards live use. Eight MIDI note assignments are indexed by a counter, which is modulated by three LFOs, two random step modulators and several performance-oriented GUI controls. The multi-trigger element from Circuit VSTi creates rhythmic articulations and can be controlled from the GUI or by modulators. Series VSTi expands on the architecture of MiniSeries.... [more]

Period Seq is a simple algorithmic MIDI generator that applies four counters to two clocks and four reset rates. It can produce non-repeating or complex, structured feeling sequences automatically. The GUI is designed for applying performance variations in use. Each counter normally creates MIDI notes at a regular periodic interval after being reset. Counters can be used to reset other counters, so that modulating the selection of clocks and reset rates applied to each counter can produce complex variation in the output. LFOs can also be reset periodically for sequencing contour effects. Per... [more]

Phase Seq easily generates unquantised looping MIDI sequences that are more difficult to achieve in some hosts. Up to eight events are triggered at manually set phase positions and three columns of sliders are dedicated to modulating the position of each trigger by the LFOs. The immediate application would be for loose timing variation, or special effect sequences, like speeding up or slowing down, or for sequences with erratic timing. Some more subtle timing effects are possible, e.g. by scaling the effect of an LFO on each step (as pictured on the screenshot) the LFO will stretch and conden... [more]

Phybes is a physically modeled VST instrument suited for emulation of vibraphone and similar mallet instruments. A mass-spring modeled mallet impulse is applied to a banded waveguide to produce continuous tonal variation in response to dynamic performance. A coupled waveguide creates resonator and modulation effects to provide a low resource emulation with pleasing dynamic timbrality suitable for many compositional applications.... [more]

Piamo is a simple physical model of a piano, providing dynamic timbral expression in a modest and flexible emulation. The model consists of a 3rd order mass-spring hammer and coupled waveguides with tuned 6th order allpass filters for modeling string stiffness. All notes use two strings whereas pianos range from one to three strings per note. Three allpass delay tiers model soundboard and cabinet resonances.... [more]

Pling is an implementation of the karplus-strong model using Chris Kerry's feedback delay network modules. The top panel models the pick impulse and the middle panel indicates string characteristics. Two sympathetic resonance models are among the modulation destinations.... [more]

Pling3 is an essential plucked string, completing xoxos' ideal implementation by adding tuned allpass filters and coupled orthagonal waveguides (modeling horizontal and vertical string vibration) to the previous build. The model is intended to suit many applications and is geared towards low CPU use. Simple Helmholtz resonators are added to emulate acoustic volume, intending supplementary processing to be used to amend emulations. A second version, Pling3b, is included with an oversampled string.... [more]

Populus generates MIDI sequences using an algorithm modeled on biological behaviour. The measure is treated as a 'year' and note events are determined by parameters describing the 'life cycle' of each note. The sequences are usually patterned, yet rarely repeat exactly, creating motif-like qualities. Populus was created for Computer Music Magazine and is included with all xoxos VST license purchases.... [more]

q2midi is a 'note generator' - when any gate signal is received, an algorithmic sequence set to key and rhythmic specifications is output along your MIDI chain. The q-engine is the same as employed in xoxos q-series VST instruments, now applicable to any instrument.Two more 'layers' of randomization are 'nested' around the gate and pitch generators for creating complex patterns that repeat or transpose motifs, or don't. q2midi also includes a separate assignable CC# control in addition to gate, pitch and velocity output.q2midi is bundled with arp2midi as a $5 bundle.... [more]

saros is a drum/percussion synth with a choice of 32 noise waveforms that are applied to up to 5 'triggers' to create complex clicky/clap percussions. A patch-recallable seed-based randomization function allows value scattering to quickly produce variation. A standard sine drop and (EVM's) sideband filtered noise burst augment percussive effect.... [more]

Series is a MIDI sequencer inspired by serial composition techniques. It is intended for rhythmic and experimental applications and geared towards live use. Two separate counters are assignable to three gate and three modulation sequences. The counters are modulated by three LFOs, four random step modulators and several performance-oriented GUI controls. The architecture is flexible and adapts to many purposes. While not intended, it can be used as a powerful arpeggiator and presents an intuitive mapping of pitch cycling functions. The multi-trigger element from Circuit VSTi creates rhythmi... [more]

Skunk is a four part algorithmic percussion sequencer. It joins short user input sequences together using probability values to determine which sequence will be next. There are eight gate sequences of up to eight steps for four parts. Pattern selection can be made both manually and automatically. The modulation section consists of four host-syncable LFOs, a modulation envelope and step 'division' multi-trigger function.... [more]

Sounds of Nature is a collection of five VST instruments for emulating common natural sounds - wind, rain, thunder, songbirds and insects. The plug-ins are: Wind Thunder Rain Oscine tract Synsect Sounds of Nature is the winning entry in the KVR Developer Challenge 2007! ... [more]

Steam is a "Fizmo-alike" wavetable synth with two 'scannable' table-based oscillators and two multi-mode filters that include a variety of sideband modes to take advantage of evolving timbres. It is optimized for dense shifting, motile, 'organic'/noisy, chaotic textures. Steam is available as a VSTi for Windows in two versions - the free version is monophonic, the full version costs US$20 and allows 6 voices of polyphony.... [more]

Steps is a VST port of the classic "Hammerhead" drum loop software.Steps features a 6 part, 4 measure sequencer, and adds an ADSR, looping, humanization and bit reduction to Hammerhead's feature set, thanks to synthedit modules by David Haupt, Chris Kerry, Etric Van Meyer and Lance Putnam.The SynthEdit source for Steps is available from the SynthEdit users group.... [more]

Stoq is a physical model for synthesizing continuous shaker and rattle timbres. The signal path, inspired by Perry Cook's PhiSEM synthesis, routes a stochastically generated impulse series to five resonant bandpass filters running in parallel. The envelope and LFO are assigned to multiple destinations to animate patches. Four key-groups are provided for creating performance articulations. The approximate pitch of the signal can also be set to follow the keyboard for tuned synthesis. Presets include tambourine, brushed snare, jingle bells, and non-instrumental sounds like footsteps and chewing... [more]

Surface uses Chris Kerry's feedback delay network module to produce surface model resonances based on x-y pad settings. Timbral behaviour within the model is similar to hand drums. Use of the 'vary' parameter allows MIDI loops to attain an organic variation.... [more]

Syng2 is a voice synthesizer which uses four band-pass filters to produce formants in any spectrally rich input signal, or using an internal oscillator. The phoneme can be selected on a second MIDI channel for precise timing of speech, or preset words can be triggered on a third MIDI channel. Syng2 was designed as an intelligible, low-CPU voice engine for Breathcube 2. The articulation is intended to be more natural than other 'robot voices' using this method, with plosives slightly emphasised to be heard with music.... [more]

Talent is an algorithmic MIDI sequence generator with a simple and flexible design that lends itself to a variety of textures across 64 scales, using live MIDI control or automatic performance by settings. arp4MIDI is also included when you purchase Talent.... [more]

Utopia creates "classic analog hihat and cymbal" timbres utilising Chris Kerry's low CPU "audio oscillator" module for SynthEdit. Complete documentation and 16 presets are included.... [more]

Virtual Machine is a commuted synthesis model for emulating engines and similar mechanical sounds. The architecture consists of three correlated signal generators and two resonators for modeling cabinet acoustics. A 'Gearbox' is used to modulate parameters as a group to add realism during 'performance.'... [more]