Synthesizer (or synthesiser) is an electronic instrument capable of producing a variety of sounds by generating and combining signals of different frequencies. Synthesizers create electrical signals, rather than direct acoustic sounds, which are then played through a loudspeaker or set of headphones.

SuperWave P8

Sample:

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TAL-Elek7ro

Sample:

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Arpy

Sample:

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1. SuperWave P8

SuperWave P8, a completely FREE virtual analogue synthesizer.
If you’re looking for great leads, pads and strings, then check out this beast of a synth. Don’t forget to check out the P8’s big brothers, the Professional and Trance-Pro which both feature upgraded specifications and new preset patches

2. TAL-Elek7ro

TAL-Elek7ro is a virtual analog synth with some special features like oscillator hard-sync and frequency modulation. It features alias-free oscillators, newly developed fast envelopes and LFOs with a wide range from 0.1Hz up to 400 Hz. A free routable envelope with attack and decay is available too. This synth is useful for a wide range of sounds from percussion to deep bass sounds.

3.Arpy

AlgoMusic’s Arpy is a free virtual analogue vsti plugin for windows.
Features includes a unison oscillator with selectable number of voices, an arpeggiator, synced LFO’s and delay.It is described as a “groove generator with a unique sound”.Included are presets designed by Tim Conrardy, and a user bank designed by Relayer which is excellent as well.