Waldorf Blofeld User Manual download pdf (Page 119)

Appendix

119 Blofeld User´s Manual

Clipping

Clipping is a sort of distortion that occurs when a signal

exceeds its maximum value. The curve of a clipped signal

is dependent of the system where the clipping takes place.

In the analog domain, clipping effectively limits the signal

to its maximum level. In the digital domain, clipping is

similar to a numerical overflow and so the polarity of the

signal’s part above the maximum level is negated.

Control Change (Controllers)

MIDI messages enable you to manipulate the response of

a sound generator to a significant degree.

This message essentially consists of two components:

• The Controller number, which defines the element to be

influenced. It can be between 0 and 120.

• The Controller value, which determines the extent of

the modification.

Controllers can be used for effects such as slowly swelling

vibrato, changing the stereo panorama position and

influencing filter frequency.

Decay

"Decay" describes the descent rate of an envelope once

the Attack phase has reached its zenith and the envelope

drops to the level defined for the Sustain value.

Envelope

An envelope is used to modulate a sound-shaping

component within a given time frame so that the sound is

changed in some manner. For instance, an envelope that

modulates the cutoff frequency of a filter opens and closes

this filter so that some of the signal's frequencies are

filtered out. An envelope is started via a trigger, usually a

fixed trigger. Normally, the trigger is a MIDI Note. The

classic envelope consists of four individually variable

phases: Attack, Decay, Sustain and Release. This

sequence is called an ADSR envelope. Attack, Decay and

Release are time or slope values, and Sustain is a variable

volume level. Once an incoming trigger is received, the

envelope runs through the Attack and Decay phases until

it reaches the programed Sustain level. This level remains

constant until the trigger is terminated. The envelope then

initiates the Release phase until it reaches the minimum

value.

Filter

A filter is a component that allows some of a signal's

frequencies to pass through it and dampens other

frequencies. The most important aspect of a filter is the

filter cutoff frequency. Filters generally come in four

categories: low pass, high pass, band pass, and band stop.

A low pass filter dampens all frequencies above the cutoff

1 2 ... 114 115 116 117 118 119 120 121 122 123 124 ... 127 128

Comments to this Manuals

No comments

Waldorf Blofeld User Manual Page 119

Comments to this Manuals

Related products and manuals for MIDI keyboards Waldorf Blofeld