Propellerhead Reason - 4.0 Manual de operaciones descargar pdf (Pagina 252)

NN-19 SAMPLER

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The Amp Envelope is used to adjust how the volume of the sound should change from

the time you press a key until the key is released. By setting up a volume envelope you

sculpt the sound’s basic shape with the four Amplitude Envelope parameters, Attack,

Decay, Sustain and Release. This determines the basic character of the sound (soft,

long, short etc.). The Level parameter acts as a general volume control for the sample

patch.

Filter Envelope

The Filter Envelope can be used to control two parameters; filter frequency and sam-

ple pitch. By setting up a filter envelope you control the how the filter frequency and/

or the sample pitch should change over time with the four Filter Envelope parameters,

Attack, Decay, Sustain and Release.

Filter Envelope Amount

This parameter determines to what degree the filter will be affected by the Filter Enve-

lope. Raising this knob’s value creates more drastic results. The Envelope Amount pa-

rameter and the set filter frequency are related. If the Filter Freq slider is set to around

the middle, this means that the moment you press a key the filter is already halfway

open. The set Filter Envelope will then open the filter further from this point. The Filter

Envelope Amount setting affects how much further the filter will open.

Filter Envelope Invert

If this button is activated, the envelope will be inverted. For example, normally the De-

cay parameter lowers the filter frequency, but after activating Invert it will instead raise

it, by the same amount. Note that Invert does not affect the Osc pitch parameter (this

can be inverted by setting positive or negative values).

LFO Section

LFO stands for Low Frequency Oscillator. LFOs are oscillators in the sense that they

generate a waveform and a frequency. However, there are two significant differences

compared to normal sound generating oscillators:

• LFOs only generate waveforms with low frequencies.

• The output of the two LFOs are never actually heard. Instead they are used for

modulating various parameters.

The most typical application of an LFO is to modulate the pitch of a (sound generat-

ing) oscillator or sample, to produce vibrato.

The LFO section has the following parameters:

Waveform

LFO 1 allows you to select different waveforms for modulating parameters. These are

(from the top down):

Destination

The available LFO Destinations are as follows:

Waveform

Description

Triangle This is a smooth waveform, suitable for normal vibrato.

Inverted

Sawtooth

This produces a “ramp up” cycle. If applied to an oscillator’s fre-

quency, the pitch would sweep up to a set point (governed by the

Amount setting), after which the cycle immediately starts over.

Sawtooth This produces a “ramp down” cycle, the same as above but in-

verted.

Square This produces cycles that abruptly changes between two values,

usable for trills etc.

Random Produces random stepped modulation to the destination. Some vin-

tage analog synths called this feature “sample & hold”.

Soft Random The same as above, but with smooth modulation.

Destination

Description

Osc Selecting this makes LFO control the pitch (frequency) of the sam-

ple patch.

Filter Selecting this makes the LFO control the filter frequency.

Pan Selecting this makes the LFO modulate the pan position of sam-

ples, i.e. it will move the sound from left to right in the stereo field.

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Propellerhead Reason - 4.0 Manual de operaciones Pagina 252

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