Файл: E-mu E 6400 EOS 4.0 manual.pdf

Скачать файл
Заказать решение

ВУЗ: Не указан

Категория: Не указан

Дисциплина: Не указана

Добавлен: 28.09.2024

Просмотров: 714

Скачиваний: 0

ВНИМАНИЕ! Если данный файл нарушает Ваши авторские права, то обязательно сообщите нам.

8 - Preset Edit

Random Sources

 

Like the Auxiliary Envelope, the LFOs can be routed to control any realtime

 

functions such as Pitch, Filter, Panning, or Volume. A common use for the

 

LFO is to control the pitch of the sound (LFO -> Pitch). This effect is called

 

vibrato and is an important performance parameter. Many presets use this

 

routing with the modulation wheel controlling “how much” LFO

 

modulation is applied. Another common effect, Tremolo, is created by

 

controlling the volume of a sound with the LFO (LFO -> Volume).

 

Another use for the LFOs might be to add a slight bit of animation to the

 

sound by routing the LFO to control the filter. In this example, the LFO

 

amount would be set low, for a subtle effect.

 

 

 

 

 

 

 

 

 

 

 

 

 

Negative Amount

 

 

 

 

 

 

-

+

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Sawtooth

 

 

Inverted Sawtooth

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

When the amount of an LFO is a negative value, the LFO shape will be

 

inverted. For example, inverting the sawtooth wave produces a wave that

 

smoothly increases, then instantly resets down.

 

Random Sources

 

 

 

 

 

Random modulation sources can be used when you want the timbre of the

 

sound to be “animated” in a random or non-consistent manner.

 

 

• Key Random 1 & 2 generate different random values for each voice

 

 

 

which are selected at key-on time and do not change during the note.

 

 

• The White & Pink Noise Generators produce varying random values.

 

 

 

Both white and pink noise sources are low frequency noise designed for

 

 

 

control purposes. Either noise source can be filtered even more by

O For more info on the

 

 

passing it through a lag processor.

 

 

 

 

 

• The Crossfade Random function generates the same random value for

Crossfade Random function see

 

 

all voices in a preset. This source is designed to be used for crossfading

Voices - Realtime Window in this

 

 

voices, although you may find other uses.

chapter.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

EOS 4.0 Software Manual 259

8 - Preset Edit

Clock Modulation

Clock Modulation

The Sequencer/Arpeggiator clock can also be used as a modulation source. It can be used to trigger the Filter or Auxiliary envelope generators, trigger Sample Start, synchronize the LFOs, or used directly as a square wave modulation source. Envelopes are triggered on the positive going edge of the clock. LFOs are triggered on the negative going edge.

The Clock source is available in six divisions (double whole note, whole note, half note, quarter note, eighth note, sixteenth note). The different rates can be used separately or in conjunction to create complex “synchro-sonic” rhythm patterns.

Using MIDI clocks, Sequencer/Arpeggiator clock can also be synchronized with an external MIDI device such as a drum machine or sequencer.

Clocks are routed exactly like the other modulations sources using the Cords. The Cord Amount MUST be positive (+) for the clock to pass. By modulating the Cord Amount, the divided clocks can be routed around using realtime controllers or other modulation sources.

Syncing an LFO to the Clock

When an LFO is triggered by a clock, the LFO wave resets to zero every time the clock wave goes low. To sync an LFO to the clock, patch a clock divisor to the LFO Trigger (Trg) in the Cords screen.

If the LFO rate is close to the clock rate, the LFO will synchronize with the clock. If the two rates are far apart, the waveform of the LFO will be mildly or radically altered (as shown below).

Triggered LFO

LFO Wave

Clock

LFO Trigger causes the LFO to reset each time the clock waveform goes low.

The possibilities of clock modulation and retrigger are numerous and varied. A repeating six segment curve of any shape can be created by triggering the Filter or Auxiliary Envelope generators with the clock.

260 E-MU Systems

8 - Preset Edit

Clock Modulation

A few other possibilities are listed below.

•Turn different voice layers on and off using different clock divisors.

•Create a global triangle LFO by routing the Clock through a Lag Processor.

•Switch between Auxiliary and Filter Envelope retriggering using a slider, footswitch or the Thumby button.

•Retrigger LFOs or Envelopes using noise or other LFOs to create random or semi random effects.

•Modulating the rate of triggered LFOs will alter the LFO waveform.

•Route multiple clocks with different divisors to the same destination (such as pitch) to create complex patterns. (Hint: Adjust the Cord Amounts.)

Eighth

Note

Quarter

Note

16th Note

8th Note

Quarter

Note

Added together in

equal amounts produces…

EOS 4.0 Software Manual 261

8 - Preset Edit

Modulation Destinations

Modulation Sources

Off

Crossfade Random

Key (+, ~), Velocity (+, ~, <) Release Velocity, Gate

Pitch Wheel, Mod Wheel Pressure, Pedal

MIDI A-H, Foot Switch 1 & 2

Flip-Flop Foot Switch 1 & 2 MIDI Volume (Contr. 7) MIDI Pan (Contr. 10)

Key Glide

Volume Envelope (+, ~, <) Filter Envelope (+, ~, <) Aux. Envelope (+, ~, <) LFO 1 & 2 (+, ~)

White Noise, Pink Noise kRandom 1 & 2,

Lag 0 in (summing amp out) Lag 1 in (summing amp out) Lag Processor 0 & 1

Clock Divisors

DC Offset, Summing Amp Switch, Absolute Value Diode, Flip-Flop, Quantizer

Gain 4x

Modulation Destinations

Off

Key Sustain, Fine Pitch, Pitch

Glide, Chorus Amt

`Chorus Position ITD

`Sample Start, Sample Loop

Sample Retrigger

Filter Freq., `Filter Resonance

Amplifier Volume, Amp Pan

Amplifier Crossfade

Volume Envelope Rates (all)

Vol. Env. Atk, Dcy, Release

Filter Envelope Rates (all)

Filt. Env. Atk, Dcy, Release

Filter Envelope Trigger

Aux. Envelope Rates (all)

Aux. Env. Atk, Dcy, Release

Aux. Envelope Trigger

LFO 1 & 2 Rates

LFO 1 & 2 Trigger

Lag Processor In 0 & 1

Summing Amp, Switch

Absolute Value

Diode, Flip-Flop, Quantizer

Gain 4x, Cord 0-23 Amount

Modulation Destinations

The Cords section of the Preset Edit module is where you connect sources to destinations. Each cord has an amount control associated with it to control how much modulation is applied.

Voice

Samples

Morph

Filter

 

Freq.

Q

Pitch

Retrig

Chor

 

Glide

 

Start

Loop

 

 

 

 

 

 

 

 

 

 

 

 

 

Envelope

Gen.

L

Amp

R

Pan

Vol

Envelope

Gen.

LFOs

Mod

Envelope

MIDI

Key #

Mod.

Wheel

Gen.

Controls

Velocity

Proc.

 

Gate

 

 

 

 

 

The Cords screen and the diagram above show how modulation sources are connected to destinations. The modulation sources can control any of the destinations in the voice.

• Note-on modulation sources, such as key, velocity and gate output a single value at note-on time. Realtime modulation sources such as LFOs, envelope generators and modulation wheels can be varied continuously.

The possible modulation routings are completely flexible as shown in the diagram above. Multiple sources can control the same destination, or a single source can control multiple destinations.

 

 

 

 

 

 

 

 

 

 

 

 

Control

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Value

 

 

 

 

 

 

 

 

 

 

0

63

127

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Control Value Applied

 

 

 

 

 

 

 

 

 

 

 

+ modulation ADDS to the

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

initial value. (Normal)

 

 

+ 0

63

127

 

 

 

 

 

 

 

 

 

 

 

 

 

~ centers around Zero.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(Use for LFOs, Filt. Freq.)

 

 

~ -63

0

+64

 

 

 

 

 

<

 

 

 

 

 

 

< modulation SUBTRACTS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

from the initial value

 

 

-127

-63

0

 

 

 

 

 

 

 

 

 

 

 

 

262 E-MU Systems

Смотрите также файлы