Cadencia is a two-oscillator virtual analog synth. It features a 4-pole 24 db/octave filter, 2 ADSR envelopes, 4 low frequency oscillators, a modulation matrix and a built-in stereo delay/flanger effect.

Snorgan combines a waveform (selected from an internal bank of sixteen) with a secondary harmonic tone. The combined signal is sent through dual 2-pole filters and a delay/flanger effect. The filters' cutoff frequencies and the delay length can be modulated by low frequency oscillators.

A Virtual analog synthesizer featuring a range of tempo-based modulation options. The demo version is fully functional except the output peridically drops to silence. The full version of Feldspar furthermore includes FeldsparFX - a VST effect plugin based on Feldspar's architecture.

Foxglove is a waveshaping monosynth. The left and right channels are generated independently which allows for interesting stereo effects.

Leto is an emulation of the Synthetone SX1000, a monosynth released by Italian manufacturer Jen in 1977.

Pterosaur is a 16 oscillator monosynth. The basic waveform of each oscillator is a sawtooth wave - but the "mod" control morphs it into a sort of saw-pulse hybrid.

Whistler produces its sound by sending white noise through a resonating bandpass filters. The notes you play control the filter's cutoff freqency. A standard ADSR envelope modifies the amplitude.