Kurzweil K2661

Price: K2661 $2995,
K2661S tba (includes sampling option)

61 note unweighted synth-style action with monophonic aftertouch
True 48 voice polyphony with 192 oscillators
Fluorescent 64 x 240 backlit LCD display
Up to 128 MB of sample memory
Flash memory for OS and ROM storage (allows software updates via SmartMedia, MIDI and SCSI)
Full MIDI controller capabilities including eight sliders, optional ribbon controller, footswitches, pedals and breath controllers all assignable
V.A.S.T. Variable Architecture Synthesis Technology with 60 DSP functions. Triple Modular Processing offers 126 sound shaping algorithms for per-voice processing
Extensive sample-processing capabilities
Over 450 programs provided
32 track sequencer with full editing
16 MIDI channels, each can be a 32 layer program
Sampling option with analog and digital inputs and sample-while-play capability

Up to 48MB on board ROM sounds, including Kurzweil's acclaimed Stereo Grand Piano
Powerful KDFX 5 stereo bus, 24-bit digital effects
Optical digital ports, selectable as ADAT Lightpipe or S/P-DIF for up to 8 channels of 24-bit digital I/O
KB-3 Organ Mode provides powerful tone wheel organ synth models
Live Mode, real-time processing of live inputs
balanced analog audio outputs
Stereo headphone output

Kurzweil's V.A.S.T. (Variable Architecture Synthesis Technology), enhanced with Triple Modular Processing, provides 127 algorithms. In addition, the KDFX effects processors provide 5 stereo bus effects with 24 bit processing. The K2661 is a complete workstation. All K2000, K2500, and K2600 Series libraries are forward compatible with the K2661. In addition, Kurzweil reads other major formats directly into the system for use with its V.A.S.T. architecture.
The K2661 also includes ADAT optical output for 8 channels of 24-bit digital output and a SmartMedia slot for convenient storage and upgrades. The K2661 includes all of the standard ROM sounds from the K2600, plus the Orchestral ROM block and Contemporary ROM block. In addition, a General MIDI 1 sound set is provided for authoring of MIDI files for the World Wide Web.


The KB-3 Organ Mode accurately models a Tone Wheel Organ. The sliders and mod wheel are used as the drawbars for real-time control. This revolutionary synthesis modeling tool gives the user the power to blend harmonics in real-time to create and control new timbres. Full polyphony is always maintained, with a single-voice containing 9 harmonics that may be blended, controlled and/or recorded in real-time.


The K2661's full-function 32-track sequencer is equipped with many features . With a maximum internal resolution of 768 ppq, sequencer functions include: Linear, Pattern and Step (Drum Machine), Record Modes, Reference Quantize, Event Edit List, Cut, Copy, Paste facilities, Advanced Auto Arranger functions (allows sequences to be triggered from keys with velocity sensitivity and transposition), grab (imports tracks from other sequences) and more. Reference Quantize allows the user to quantize to a groove track, and to quantize tracks not previously recorded with a click. The Event Edit List, with view filters and audible scroll, enables precise, computer-style editing. If the user already created some work on a computer sequencer, or wants to use a computer for additional development, the K2661 can import and export either Type 1 or Type 0 MIDI files on DOS format media.

MIDI Control

The K2661 is a complete MIDI controller. The front panel also has eight independently assignable sliders, useful as MIDI sliders, for sequencer mixdown, or as organ drawbars in the KB-3 Mode. Two buttons above the pitch and mod wheels are completely programmable. The optional 600mm ribbon controller is programmable in three distinct zones or one long zone. Additional controllers include sequencer "transport control" buttons, 4 footswitch inputs, and 2 continuous control pedal inputs (1 CC and 1 CC/breath controller). The breath controller input accepts Yamaha BC-1, BC-2, and BC-3 breath controllers.

Balanced Outs

The K2600 includes 24-bit Balanced Audio Outputs with patented output circuitry that deliver professional audio signal levels (1/4" t/r/s). Unbalanced (1/4") outputs are also supported.

Live Mode

V.A.S.T. DSP has the capabilities to process any incoming mono or stereo signal via the digital inputs or analog inputs (requires the sampling option) plugging your guitar, microphone, mixer or tape track directly into your K2661 and customizing the sound using any of the V.A.S.T. parameters, all in real-time. Then you can add effects using the K2661's KDFX. With the ADAT/AES selectable optical I/O connections you get up to 8 inputs and 8 outputs which can bidirectionally communicate with other devices such as Adat Modular Digital Multitrack recorders or computer digital audio interfaces.


The rear panels of the K2661 provides additional controller inputs for a multitude of interfacing possibilities. The controller inputs include the 600 mm ribbon controller, four footswitch, one breath-controller and two continuous control pedal jacks (1 CC pedal and 1 CC/breath input). Interconnection is easy with a 25-pin SCSI connector and MIDI In, Out and Thru (Thru switchable to a copy of Out). Rear panel outputs include a pair of mixed audio outs, four individual 24-bit balanced audio outs with Kurzweil's patented output circuitry, and one headphone output. In addition, optical ports provide selectable ADAT Lightpipe or S/P-DIF I/O. Add the K2661 Sampling Option for a full range of additional digital and analog inputs.


Model: K2661 - 61-note unweighted synth-style keyboard

Power Supply: User switchable international power supply.

Architecture: Proprietary V.A.S.T. system.

Polyphony: 48 voices.

Display: 64 x 240 fluorescent backlit display with brightness and contrast controls.

Analog I/O: 4 balanced audio outs with 24-bit converters plus mix stereo pair (can also be used as unbalanced). Stereo headphone out.

With SMP-2X sampling option (due out Spring 2004 / price: tbd): Stereo 1/4 in. unbalanced analog hi-Z input (tip/ring/sleeve); two balanced lo-Z (XLR) inputs.

Digital I/O: 8 channels of 24-bit ADAT input and output or 2 channels of S/P-DIF input and output via optical ports.

With SMP-2X (due out Spring 2004 / price: tbd): 2 channels optical S/P-DIF inputs.

Sample RAM: Up to 128 MB via 1 non-composite 72 pin SIMM.

Sound ROM: Up to 48 MB; 32 MB base ROM plus 8 MB Stereo Dynamic Piano ROM, and 8 MB Vintage Electric Piano ROM

Sequence/Program RAM: 1.5 MB user-programmable battery-backed RAM.

SCSI support: One SCSI-1 25-pin connector.

Software Upgrades: User-installed upgrades via SmartMedia card, MIDI or SCSI. Software available for download from this web site. DOS compatibility required.

AFMS File System: User-friendly cataloging and retrieval of individual objects.Utilities including: file search, info about media/available space, disk macros, startup file applications, and more.

KB3 Drawbar Mode: Allows blending of nine harmonics per voice in real-time (full polyphony maintained at all times). KB3 Mode allows realistic tone wheel organ emulations and innovative, dynamic new timbres.

Live Mode: Process any incoming signal via the digital or optional analog inputs with powerful V.A.S.T. synthesis functions and built in KDFX capabilities.

Sample Processing DSP: Non-real-time DSP functions include time compression/expansion, pitch shifting, re-sampling, pasting samples on beats-per-minute timeline (Mix Beat), volume ramps, mix sample, and many other functions. Sample Processing DSP does not require the sampling option to be installed.

Sequencer: Full-function sequencer with 16 song and 16 arrangement tracks. Offers pattern, linear, and step recording, cut/copy/paste, advanced 'groove' quantizing, event list editing and other powerful editing tools. Sequences can be triggered in real time from the keyboard.

Compatibility: Reads/writes Standard MIDI Files, AIFF and WAVE files. Reads libraries in Roland 700 series, Akai S1000, S1100, and S3000, and Ensoniq EPS, and ASR file formats.

Options include:

SMP-2X Advanced Sampling Option (due out Spring 2004 / price: tbd) with Analog and Digital (optical) input, and Sample-while-play.

Stereo Dynamic Piano ROM, and Vintage Electric Pianos ROM Sound blocks add additional ROM samples, along with new preset programs and setups


39.4" x 14.2" x 4.3"
100.2 cm x 36 cm x 11 cm


32 lbs. 14.5 kg

Kurzweil Music System EUROPE
Gl. Donsvej 8
6000 Kolding - DK
Phone: (+45) 75 56 96 44
Fax: (+45) 75 56 96 55

Kurzweil Music System ITALY
M. Casale Bauer s.p.a.
Via IV Novembre 6-8
40057 Cadriano di Granarolo - Bologna
(+39) 051-766648
(+39) 051-766525 fax

Europe Distributors Listings

Kurzweil Music System
Young Chang America
PO Box 99995
Lakewood, WA 98499-0995
(253) 589-3200
(253) 983-8206 faxs

International Distributors Listings

advanced technologic sound magazine
2004 august issue 128

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