92
PRACTICAL GUIDE
The filter envelopes
The DC and DO Sounds can be affected by dynamic filters which can be made to vary
over time. The variation is programmed by means of an Envelope (s.). The Filter Enve-
lope is extremely useful to render a sound “live”.
Envelopes
Types of Envelopes
The envelopes vary the quality of the Sound over time. There are the Key On Envelopes,
which affect the Sound continuously during the period that the note is held pressed, and
the Key Off Envelopes, which affect the Sound after the note has been released (Release
phase).
The S Series Sounds can have programmable envelopes for the following sound param-
eters:
Amplitude The Amplitude Envelope represents the Volume displacement in relation to time. In the
most common cases, the Volume of a sound increases sharply immediately after attack, then there
is a sharp decay to a lower level, then it remains more or less at a constant level (such as Strings)
or decays slowly (such as the Piano). In the phase that follows the release of the note, or the “key
off” phase, the sound gradually fades to “zero” level. With the synthesizer it is also possible to
create non-realistic envelopes.
Filter The Filter Envelope modifies the cut-off frequency over time, modifying, therefore, the
harmonic content of the timbre being affected. SO Sounds cannot be affected by this envelope.
Pan The Pan Envelope modifies the position of the sound within the stereo panorama over time.
(This editor is not available for SO Sounds).
Pitch The Pitch Envelope modifies the Pitch of the sound over time. This parameter can be useful
to simulate the unpredictable initial pitch of Brass or Strings sounds.
Balance Only available for the DO Sounds. The Balance Envelope (in reality it corresponds to the
Pan Envelope or to the Pitch Envelope) varies the Volume displacement over time of the two
oscillators which constitute the Sound.
Programming the envelopes
The envelope edit pages consist of a graphic parameter. For example, the following
display shows the Key On Amplitude Envelope, identical to all the other envelopes:
Segment A section of the selected envelope.
Time Duration of the segment.
Level Generally, the level reached by the parameter when the segment of the selected envelope
is played. For.ex. in the Amplitude Envelope it represents the Volume of the sound, in the Filter
Envelope it is the cut-off frequency, in the Pan Envelope it is the position of the sound.
Содержание S2 Turbo
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