Primer is a synthesizer included with Syntorial (an award-winning synthesis training application), now as a standalone tool. It contains the most common controls that can be found in most subtractive / analog synthesizers, which allows you to use a wide variety of patches and sounds, and also provides a simple and intuitive interface.
Subtractive synthesis
• Three Oscillators (Two with Waveform, Pitch, Pulse Width, and Mix controls, and a Sub oscillator with Waveform and Volume controls)
• Saw, Pulse, Triangle and Sine waveforms
• FM knob
• Noise Oscillator
• Oscillator Sync
• Filter (Low, Band and High Pass) with Resonance and Key Tracking
• ADSR Filter Envelope
• ADSR Amp Envelope
• AD Modulation Envelope
• LFO with four waveforms, seven destinations, rate, amount, trigger, and mono / poly modes
• Mono, Legato and Poly Voice Modes
• Portamento
• Unison with Voice, Detune and Spread controls
• Ring Modulation
• Distortion, Chorus, Phaser, Delay, and Reverb effects
• Mod Wheel, Pitch Wheel and Velocity controls