Voice And User Voice; Calling Up The Timbres; Second Voice - KETRON SD1 User Manual

Voice and User Voice

One of the fundamental features of the SD1 is its timbre quality and consequently the synthesis technology exploited that is based on multi-
samples processed in subtractive synthesis, frequency modulation and additive synthesis. The samples have been developed over the last few
years by a team of international programmers and, likewise for the acoustic piano, exploit up to 64 samples arranged along the keyboard on
two different levels of dynamics. For each timbre the musician can use up to a maximum of two oscillators at the most, but the quality of the
single samples is such that most of the timbres exploit only one oscillator. This item directly affects the polyphony, which is not halved: the 64
Polyphony notes are not so far from reality! The synthesizer of the SD1 exploits an LPF filter with 24 dB/Octave, three envelopes, two LFO's and
a complete modulation section. The part in frequency modulation is based on an algorithm with four operators of which two are bearing and
two modulating, the additive one is used for the timbres of a Hammond organ in the Drawbars mode. We have intentionally restricted access
to the parameters that are fundamental for the timbre.
The SD1 is capable of loading new samples, files in .WAV format and the Multi-samples that will be produced by Ketron, plus it can produce its
own samples thanks to the sampler supplied standard.
The organisation of the timbres uses a bank of Preset Voices that cannot be accessed in any way by the musician, on which the more natural
timbres are based, a General MIDI bank (used again for the Styles) and a bank of 128 User Voices. The latter is used to program your own tim-
bres starting also from those in General MIDI.
Amongst the distinctions of the SD1 you must also remember that the Preset Voices, namely the more natural timbres, can be used only by the
Lower and Right section, whereas the accompaniment tracks will use only the Voices in General MIDI to maintain the compatibility.
For the Right part the Programs enable the use of up to four Voices at the same time, arranged along the keyboard and with parameters that
are separate from one another. It is also possible to set a second timbre to be played over the main timbre (Second Voice).
To call up the Voices you can use the control panel push buttons VOICES and USER VOICE, or you can create a list of customised Voices with
the most frequently used timbres (1 Touch).
A particular section is that of the Drum. It is specific for playing the drum sets right over the whole keyboard. The SD1 uses both drum sets
derived from samples and grooves achieved by recording famous drummers or percussionists live, then processed via a proprietary procedure
to obtain a drum set but with "real" percussion instruments (Live Drum). Both types of drum sets can be used by the musician, even right over
the entire keyboard.

CALLING UP THE TIMBRES

The two rows of eight push buttons called VOICES are used to call up the timbres according to the family to which they belong. When a fami-
ly is selected using the push button, the display shows five Voices to the left and five Voices to the right, which can be enabled by pressing the
function button relative to that timbre. Considering that the SD1 bears more than ten Voices per group, the following pages can be seen either
by using the PAGE + and PAGE – push buttons or by pressing the push button relative to the Family of Voices in use again.
When the SD1 reaches the last page of Voices available, if you press the push button relative to the family of voices again you will return to the
group of voices of the first page. This is not achieved using the PAGE + and PAGE – push buttons.
The VOICES push buttons do not call up the preset voices alone.
If the LED of the USER VOICE push button is lit, in other words the bank of timbres that can be programmed by the user, 8 the VOICES push
buttons call up the 128 User Voice timbres in groups of ten at a time.
If the LED of the DRAWBAR push button is lit, then an organ timbre corresponds to the single VOICES push button.
If the LED of the PROGRAM push button is lit, then the VOICE push buttons call up the Program memories.
If the LED of the ONE TOUCH push button it lit, then the first row of VOICE push buttons calls up one of the eight pages that make up the One
Touch memories.
If the LEDs of the DRUM SET and MANUAL DRUM push buttons are lit, then the first six VOICES push buttons are used to select the banks of
ten Drum sets each.

SECOND VOICE

The SD1 offers the possibility to create a layer of two overlapped timbres for the section to the right of the keyboard split point. The display
shows the name in small letters of another Voice that is indeed called Second Voice under the name of the Voice selected. To avail of the Second
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Owner's Manual SD1