Play: Click/tap keys on the keyboard or use your computer keyboard (Z-M for lower octave, Q-I for upper octave).
Waveform: Click the waveform buttons to change sound type: Sine, Square, Sawtooth, Triangle.
ADSR: Drag the envelope sliders to shape your sound - Attack, Decay, Sustain, Release.
Filter: Adjust the low-pass filter cutoff and resonance for tonal shaping.
Octave: Shift up or down 2 octaves (+/- buttons).
Presets: Piano, Organ, Lead - instant sound changes.
Drag: Click and drag across keys for glissando effects.