Roland VS-700 用户手册

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91
 
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Overview of the Fantom VS
 
When using the Fantom VS, you will notice that a variety of 
different categories come into play when working with 
sounds. What follows is a simple explanation of each sound 
category.
 
Tones
 
On the Fantom VS, the tones are the smallest unit of sound. 
However, it is not possible to play a tone by itself. The patch 
is the unit of sound which can be played, and the tones are 
the basic building blocks which make up the patch.
 
fig.04-002.e
 
Tones consist of the following five components.
 
WG (Wave Generator)
 
Specifies the PCM waveform (wave) that is the basis of the 
sound, and determines how the pitch of the sound will 
change.
The Fantom VS has 1,240 different waveforms. All patches 
built into the Fantom VS consist of combinations of tones 
which are created based on these waveforms.
 
There are four wave generators for each rhythm tone 
(percussion instrument sounds).
 
TVF (Time Variant Filter)
 
Specifies how the frequency components of the sound will 
change.
 
TVA (Time Variant Amplifier)
 
Specifies the volume changes and the sound’s position in a 
stereo soundfield.
 
Envelope
 
You use Envelope to initiate changes to occur to a sound 
over time. There are separate envelopes for Pitch, TVF (filter), 
and TVA (volume). For example if you wish to modify the way 
in which the sound attacks or decays over time, you would 
adjust the TVA envelope.
 
LFO (Low Frequency Oscillator)
 
Use the LFO to create cyclic changes (modulation) in a sound. 
The Fantom VS has two LFOs. Either one or both can be 
applied to affect the WG (pitch), TVF (filter) and/or TVA 
(volume). When an LFO is applied to the WG pitch, a vibrato 
effect is produced. When an LFO is applied to the TVF cutoff 
frequency, a wah effect is produced. When an LFO is applied 
to the TVA volume, a tremolo effect is produced.
 
LFO is not included in the rhythm tones (percussion 
instrument sounds).
 
How the Fantom VS is Organized
 
Classification of Fantom VS Sound Types
WG
Pitch
Envelope
TVF
TVF 
Envelope
TVA 
Envelope
TVA
LFO 1
LFO 2
control signal
Tone
audio signal
VS-700_r_e.book 91 ページ 2008年11月20日 木曜日 午後2時28分