Professional Web Synthesizer

9-Voice Polyphonic Synthesizer - Completely FREE

Experience the warm, analog character of classic 1980s synthesizers right in your browser. No installation, no plugins, no costβ€”just pure 9-voice polyphonic synthesis powered by cutting-edge Web Audio technology.

100+
Vintage Presets
9
Polyphonic Voices
2
Oscillators + Sub
5
Pro Effects
0
Cost (Free!)

Powerful Features

🎹

Dual Oscillators

Two independent oscillators with PWM, multiple waveforms, detuning, and a powerful sub-oscillator for deep bass.

πŸŽ›οΈ

Professional Filter

Multi-mode filter with resonance, drive/saturation, and dedicated ADSR envelope for classic analog shaping.

🎼

9-Voice Polyphony

Play up to 9 simultaneous notes with intelligent voice allocation, mono/poly modes, and smooth voice stealing for expressive chords and leads.

🌊

Dual LFO System

Two LFOs with multiple waveforms, tempo sync, and flexible routing for expressive modulation.

🎚️

Studio Effects

Professional chorus, delay, reverb, and distortion with adjustable parameters for studio-quality sound.

🎡

Smart Arpeggiator

Built-in arpeggiator with 7 patterns, tempo sync, octave range, and hold mode for performance.

🎹

MIDI Support

Full MIDI input with device selection, channel filtering, velocity sensitivity, and CC mapping.

πŸ’Ύ

Preset System

100+ vintage presets inspired by classic hardware, plus unlimited custom preset storage.

πŸ”Š

Recording & Export

Record your performances directly to WAV/MP3, or export MIDI for use in your DAW.

🎀

Looper & Backing Tracks

Built-in looper for live layering, plus backing track player for practice and performance.

🎚️

Portamento/Glide

Smooth pitch transitions between notes with adjustable glide time, perfect for expressive leads and classic analog sweeps.

πŸ’‘

Visual LED Feedback

Real-time LED indicators show oscillator activity, filter modulation, LFO pulses, and effects status for intuitive visual performance feedback.

Get Started in 3 Steps

  1. Click "Launch Synthesizer" - Opens Saturn 9 in your browser (Chrome/Edge recommended)
  2. Click the screen to enable audio - Web Audio requires user interaction to start
  3. Play using your keyboard, MIDI controller, or on-screen keys - Start making music instantly!

Ready to Create?