Offered as an electronic download, the One Software Plug-In from FabFilter is a professional-quality, aliasing-free, single-oscillator synthesizer with triangle, sawtooth, and square waveforms for Mac or Windows computers. It can be used to create audio in music applications such as studio recording, post production, DJing, and more. It features an oscillator and filter which can be modulated by LFO and EG (Envelope Generator) and has an adjustable wave balance so any waveform between sawtooth and triangle can be selected. Additionally, the LFO's tempo can be synced to the host. The EG has the usual ADSR knobs, but with the ability to fine-tune the sound. It also has an additional Hold setting that extends the time keys are held down.
The One Software Synth plug-in has comprehensive MIDI specs, including MIDI learn, and Smart Parameter Interpolation for smooth parameter transitions—with no digital clicks or zipper effects even when you are using MIDI controller changes. The software offers extensive interactive help hints, AltiVec and SSE optimization, and much more. The One is available in VST, VST 3, Audio Units, AAX Native and AudioSuite formats, in both 64- and 32-bit, and RTAS in 32-bit.