KEYTEK CTS 2000 Instruction Manual page 5

CTS (cross table sampled) technology
In general, the new CTS synthesis method is capable of reproducing sounds of comparable quality to
those reproduced by digital samplers, which, by contrast, require more memory capacity.
After years of research and experimentation on the data of sounds computed through the use of CDS
computers (compurers sound designed). Our laboratories, using special mathematical algorithms,
have succeeded in dissecting the original sounds and obtaining the most significant elementary
portions called Tables (Table Sampled).
These tables, appropriately coupled and mixed together, (Cross) reproduce the original sound with
very high fidelity, allowing a significant reduction in the memory used.
This technology allows, for example, the sound of an acoustic piano note to be reproduced using only
384 bytes of memory compared to the 200,000 bytes required for standard sampling.
All this has made it possible to equip the CTS 2000 with a considerable number of in-line sampled
sounds that can be used immediately by the musician.
In addition to all this, there are incredible creative possibilities, since the musician can not only
permanently modify the sounds supplied by the company, but also create new and absolutely
original ones by mixing together tables of different timbres and then treating them with analogue
controls.
CTS 2000 ARCHITECTURE
Tables
Most of the 333 tables in the CTS 2000 are derived from acoustic instruments (Piano, Guitar,
Vibraphone etc.) but others were sampled from FM technology instruments (FM Piano etc.) and
analogue synthesisers (Square Wave, Sine Wave, Sawtooth etc.).
The tables stored in the instrument cannot be modified, as they constitute the database from which
the sounds are generated.
Sounds
The synthesizer is equipped with 2 voice generators (8-voice polyphony). Each generator can read
and play, independently of the other, up to 3 different tables in a sequential manner and with
programmable times and modes.
The 6 tables used in this way constitute the basic L sound of a Zone (octavia) keyboard.
Each individual sound can be manipulated with a wide range of analogue controls such as ADBSSR for
DCA and DCF, LFO, dynamic coefficients for DCA and DCF etc.
It can also be complemented with specific Midi functions and specific Pan-Pot Stereo.
Presets
Each sound thus created can be played within its own Zone (Octave).
It is therefore necessary to create 5 sounds (which may also be different in timbre) in order to have a
keyboard preset.