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Kurzweil K2500 76 Workstation

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The K2500 has been designed to be a versatile instrument both for performance, and for multitimbral sequencing and recording. Its Variable Architecture Synthesis Technology lets you build sounds from realistic instrumental samples and sampled synth waveforms—then modify the nature of those sounds through a dazzling array of digital signal processing (DSP) functions. The K2500 also generates its own synth waveforms, which can be combined with the samples or used on their own. The K2500 packs 8 Megabytes of on-board sound ROM, and you can load samples from disk into optional sample RAM.

Before we get into explaining Variable Architecture Synthesis, here are a few of the features that by themselves make the K2500 an impressive stage and studio machine. It’s fully multitimbral— different programs can be played on each MIDI channel. It’s 48-note polyphonic, for a full sound no matter how many chords you play. There’s an on-board digital effects processor, providing up to four simultaneous effects, including realtime effects control, internally or via MIDI.

How the K2500 Works

The K2500 integrates two MIDI-driven components: a sound engine, and a global effects processor. The sound engine responds to the MIDI events generated by your MIDI controller and turns them into sounds that are processed within the variable architecture of the algorithms. The resulting sound can then be routed through the effects processor and to the MIX or separate audio outputs.

In addition to the standard stereo audio output pair, there are eight separate outputs that can be configured as stereo pairs, or as individual mono outputs. You can also use the separate outputs as insert points for outboard gear.

The K2500 offers eight SIMM sockets (single, in-line memory modules) so you can add optional sample RAM, where you can store samples that you’ve loaded from disk. You can add up to 128 megabytes of sample RAM! (Sample RAM is not battery-backed, so RAM samples are erased from memory when you power down.)

For offline storage, there’s also a floppy drive and two SCSI ports, so you can store files on floppies or on an external hard disk or load them from a CD-ROM drive. The two SCSI ports make it easy to chain multiple SCSI devices together. There’s also provision for an internal SCSI hard disk. You’ll find all this storage potential extremely useful for saving and loading samples, which can be transferred to and from the K2500 using the standard MIDI sample transfer format, or the new, faster, parallel SMDI sample transfer format (SCSI Musical Data Interchange). See the Reference Guide for information about MIDI and SMDI sample transfers. The K2500’s battery-backed RAM will store about 400 of your own programs, or 30,000 notes recorded in the sequencer. This sequencer (Song mode) lets you play back MIDI type 0 sequences, record and play back your own songs, and record multi-timbral sequences received via MIDI. For more onboard storage you can add the P/RAM option, which will increase your battery-backed RAM to about 1250K, enough to store hundreds of additional programs, setups, songs, and other objects.

The Local Keyboard Channel feature enables you to use the K2500’s tri-zone setups even if your MIDI controller can transmit on only one channel. The K2500 will also rechannelize incoming MIDI information and send it to its MIDI Out port, enabling you to control additional synths on three different channels.

An optional sampling feature is available, allowing you to make your own mono or stereo samples using analog or digital inputs.

And, of course, there’s the incomparable Kurzweil sound. The K2500 comes to you with 200 preset factory programs (called patches, presets, voices, etc. on other synths), as well as 100 multi-zone performance setups. Play them straight from the box, tweak them in any number of ways, or develop your own programs from scratch—which brings us back to the powerful programming capabilities of the K2500.

What is VAST?

Variable Architecture Synthesis gives the K2500 its unprecedented flexibility. While many other synthesizers offer a fixed set of DSP tools (typically filtering, pitch, and amplitude modulation) the K2500’s Variable Architecture lets you arrange a combination of any five DSP functions from a long list of choices. The functions you choose define the type of synthesis you use. Each layer of every program has its own DSP architecture, what we call an algorithm . Within each algorithm, you can select from a variety of DSP functions. Each function can be independently controlled by a variety of sources including LFOs, ASRs, envelopes, a set of unique programmable functions (FUNs), as well as any MIDI control message. The many different DSP functions and the wealth of independent control sources give you an extremely flexible, truly vast collection of tools for sound creation and modification.

Technical Specifications
Type: Digital
Synthesis: ROM, Sampling, Wave Table
Oscillators: 3
Waveforms: ROM, Wave Table
ROM Size: 8
ROM Resolution: 16 bit, 44.1 kHz
Osc Modulation: After Touch, Breath Controller, Continuous Controller, Envelope, Input, Keyboard, Knob, LFO, Mod Wheel, Oscillator, Pedal, Pitch Wheel, Glide / Portamento, Ribbon, Sequencer, Velocity
Sampling: 16 bit
Envelopes: *
Evelope Paramerters: Attack, Sustain, Release
Types: 12dB Slope (2-pole), All Pass, High Pass, Low Pass
LFO: *
LFO Parameters: Sample & Hold, Square, Triangle
Polyphony & Tuning
Polyphony: 48
Timbrality: 16
Tuning: Atonal, Standard
Patches RAM: 200
Patches ROM: 238
Storage: Tape, Internal
Editing: MIDI, SCSI
31 programmable DSP algorithms
Case: Keyboard
Keyboard: 76 keys
Controls: Aftertouch, Mod - Wheel, Pitch - Lever, Velocity - Release, Mod - Ribbon, Sequencer, Pedal - Sustain, Switches, Tempo Knob, Velocity, Pedal - Volume
Display Type: LCD, LED, Backlit
Display Count H: 240
Display Count V: 60
Dimensions (WxDxH): 1214 mm x 451 mm x 122 mm
Weight: 25.4
Audio Output Connections: 1/4" Phone Jack, Stereo Main, Stereo Headphone
Audio Output Notes: 2
Inputs: 1
General MIDI: GM - General MIDI
DAC Bits: 24
Year Released: 1996
Manuals & Documents

Product Links
Company Product Sites:
[+] kurzweil.com
Used Price: $400 - $950 - convert

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