The Kurzweil PC4 88-Key Performance Controller and Synthesizer Workstation is the ultimate hammer-action keyboard offering the most technologically innovative features for professional results.

256 Voices of V.A.S.T. Polyphony

More polyphony from Kurzweil's acclaimed V.A.S.T. engine than any product in Kurzweil's history.

2 Gigabytes of Factory Sounds

Over 1000 hand-selected factory presets organized into 13 categories of Programs featuring the optimized German 9 feet and vintage Japanese 7 feet concert grand pianos (with KSR - Kurzweil String Resonance). Also included is 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 obsessive attention to detail.

Patented FlashPlay Technology

Flash-Play provides the PC4 with a staggering amount of horsepower; 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

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 complement of tonewheel controls is 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!

88-Note Hammer-Action Keyboard

Every sound within the PC4 is perfectly matched to its 88-note fully weighted hammer-action keyboard with aftertouch.

16-Zone Multi Controller Mode

Construct massive sonic combinations via Kurzweil's renowned Multi mode (aka Setup mode) offering 16 zones of unparalleled MIDI controller capabilities.

16-Track Sequencer

The PC4 features a 16-track internal sequencer to record/edit/mix/produce your own tracks - all in the box. Import MIDI (.mid) files as well as Kurzweil PC3-family songs.

16 Simultaneous RIFF Generators

Trigger and manipulate up to 16 simultaneous MIDI sequences on the fly. Select from an internal library of patterns or record/import your own!

16 Simultaneous Note Arpeggiators

Looking for a pulse? Activate up to 16 independent Arps (1 per program, 16 per Multi) and discover the new Step Sequencer environment!

Live Audio Input with FX

Plug in and jam along with your favorite music player via a 1/4-inch pair and/or 1/8-inch audio input. The input bus sports its own dedicated real-time FX. Sweeten your backing tracks for live performance and internally mix the signal with the PC4's own output.

Front Panel Master Transport Controls

Use the buttons in the TRANSPORT section to control the recording and playback of the onboard 16-track sequencer.