256 Voices of V.A.S.T. Polyphony!
More polyphony from our acclaimed V.A.S.T. engine than any product in Kurzweil history!

2 Gigabytes of Factory Sounds
Over 1000 hand-selected factory presets organized into 13 categories of Programs and featuring our optimized German 9 ft. and vintage Japanese 7 ft. concert grand pianos (with “KSR” – Kurzweil String Resonance). Also included are a wide selection of tailored sounds from the acclaimed Forte® (EP, Clav, Celeste, Crotales, Harpsichord), as well as PC3 Series and KORE 64™ expansions – all handcrafted to deliver unprecedented expressiveness with an obsessive attention to detail.

Patented FlashPlay® Technology
Flash-Play® provides the PC4 with a staggering amount of horse-power; 2 GB sample content with zero-loading time, and ultrafast performance.

2 Gigabytes User Sample Memory
Load up to 2 GB of your own custom samples into non-volatile flash memory. Supported sample formats: .WAV, .AIF (up to 16 bit / 96kHz) and Kurzweil formats (.P3K, .KRZ, .K25, .K26).

V.A.S.T. Editing
Deep native editing? Look no further. The PC4 grants full access to Kurzweil’s legendary Variable Architecture Synthesis Technology directly from the front panel. With 32-layers per program, each offering its own signal path and a host of modular DSP tools, the PC4 offers a wealth of sound creation and modification that is truly immense.

6-Operator FM Engine
6 Operator FM Engine with the ability to load original FM SysEx files.

CC Sequencers
Add sonic animation to your sounds via 16 simultaneous MIDI CC Step Sequencers for modulation sequencing.

KB3 ToneReal™ Organs
Modeled after classic organs. A full compliment of tonewheel controls are immediately accessible including 9 realistic drawbars, rotary speed, chorus/vibrato, brake, percussion and more.

Powerful FX Engine
Award-winning Reverbs, Delays, Choruses, Flangers, Phasers, Distortions, Rotary Amplifiers, Compressors and more – all fully editable from the user-interface. The PC4 also offers a global Master FX section featuring 3-band EQ and Compression.

K.S.R. – Kurzweil String Resonance
Piano string resonance modeling for enhanced acoustic piano performance!