3 KVR members have added SM 271 - Calculator Synth to 2 MyKVR groups 4 times.
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SM 271 is the realization of a daydream I had through countless high-school math classes: What if this calculator could make music instead of forcing me to sit through another two-hour lecture?
That dream finally came true.
Don't let the LCD screen fool you. Behind the playful exterior of a classroom calculator hides a serious Virtual Analog synthesis engine. Designed to strip away menu-diving and bring the fun back to sound design, SM 271 lets you dial in everything from bone-rattling basses to lush, cinematic pads with the simplicity of basic arithmetic.
Whether you're sketching a lo-fi beat or crafting a main-stage lead, SM 271 simplifies the equation.
Features:
- 2 Virtual Analog Oscillators: 7 shapes including PolyBLEP anti-aliased classics, 7-Voice Supersaw, Phase-Feedback Sine, and circuit-bent Data waves.
- 5 Noise Flavors: White, Pink, Brown, Blue, and a Digital noise source.
- Dual Filter Engine: Simultaneous High-Pass and Low-Pass filters for precise spectral sculpting.
- Snappy ADSR Envelopes: Logarithmic curves tuned for punchy plucks and evolving pads.
- Wide-Range LFO: Capable of everything from slow "Tape Drift" instability to audio-rate modulation.
- Studio-Grade FX Rack: 4 high-quality processors designed for lush, polished tones.
- Distortion (5 Modes): Bitcrush, Soft Clip, Hard Clip, Diode, and Wavefold.
- Stereo Chorus (4 Modes): Dimension, Ensemble, Wide, and Vibrato algorithms.
- Reverb (4 Modes): Lush Hall, Tight Room, Plate, and Spring-style algorithms.
- BPM-Synced Delay: Stereo delay for rhythmic echoes.
- Calculator Portamento: Includes Mono and Poly modes
- 30+ Factory Presets: Ready-to-use Bass, Leads, Plucks, and Pads.

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