E-Mu ProteusX, Руководство по эксплуатации

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5 - Preset Editor
Preset Globals
58 Proteus X Operation Manual
The four just intonation tables are called Just C2, Just C3, and Just C Minor. Try playing
in the key of C/Cm using each table. You’ll quickly discover both the wonders and the
frustrations of just intonation! In Just C, for example, you’ll find that the chords C, Em,
F, G, and Am sound beautiful. If you hold one of these chords, you’ll hear no “beating”.
After playing for a few minutes, switch back to Equal Temperament for a rude
awakening!
At this point you might wonder why anyone would use Equal Temperament to begin
with. For the answer to that question, play a D, Dmi, or Bb chord! The intervallic ratios
that make the C & G chords sound so pure make the D chord sound horribly out of
tune. That's why we had to include Just C3. In this tuning, D, Dmi and Bb sound in
tune, but the G chord will sound wrong.
Each of the 4 tables allows you to play a different group of common chords in just
intonation. Sadly, there is no single 12 note tuning that will allow all of the common
chords to be in tune, and of course that's why they invented the equal temperament
tuning system that we use today.
Just C
Play these chords:
C, E, F, G, A, Cm, C#m, Em, F#m, Gm, Am
Just C2
Play these chords:
C, E, F, G, A, B, C#m, D#m, Em, G#m, Am, Bm
Just C minor
Play these chords:
C, D
b
, D, E
b
, G, A
b
, C m , E m , F m , G m
Just C3
Play these chords:
C, D, F, B
b
, C# m , D m , E m , F# m , G# m , A m
Preset Modulators
The Preset Modulators are special class of modulation sources in that they originate at
the Preset Level , but their output is used in the Voice PatchCords. There are three types
of preset modulation sources.
Channel Lag 1 & 2 Rate
Like the Layer Lag processors (described on page 98 ) the Channel Lag slows down
rapid changes in the input signal. The output “lags” behind the input at a pre-
programmed rate.
Unlike the layer level lag processors, the Channel Lags 1 & 2 take effect as soon as the
preset is selected. In contrast, the Voice level lag processors begin acting only after a
keyboard key has been depressed. The Channel Lag also has a
Lag Amount input which
controls the lag time. Positive lag amounts increase the lag time. A MIDI controller
(front panel knob) is commonly used to control lag amount.
Preset Modulator Typical Uses
Channel Lags 1 & 2 “Leslie” speaker effects. Switch slowly increases/decreases LFO speed.
Poly Ramp (Timer) Controlling key-up layer volume based on the time a key is held.
Channel Ramp Ramps on First Note only. Used for “Hammond” style organ percussion.