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1 persson 1236 <glossary id="glossary"><title>Glossary</title>
2     <!--
3     <glossentry id=""><glossterm></glossterm>
4     <acronym></acronym>
5     <glossdef>
6     <para></para>
7     <glossseealso otherterm=""></glossseealso>
8     </glossdef>
9     </glossentry>
10     -->
11    
12 persson 1238 <glossdiv id="gloss_A"><title>A</title>
13 persson 1236 <glossentry id="gloss_adsr"><glossterm>ADSR</glossterm>
14     <acronym>ADSR</acronym>
15     <glossdef>
16     <para>
17     Attack, Decay, Sustain, Release, abbreviation for the so called
18     ADSR-envelope that forms a shape which controls voltage controlled
19     circuits like amplifiers or filters.
20     </para>
21     <glossseealso otherterm="gloss_attack">Attack</glossseealso>
22     <glossseealso otherterm="gloss_decay">Decay</glossseealso>
23     <glossseealso otherterm="gloss_envelope">Envelope</glossseealso>
24     <glossseealso otherterm="gloss_sustain">Sustain</glossseealso>
25     <glossseealso otherterm="gloss_release">Release</glossseealso>
26     </glossdef>
27     </glossentry>
28    
29     <glossentry id="gloss_attack"><glossterm>Attack</glossterm>
30     <glossdef>
31     <para>time value, time span defined for an
32     envelope to rise after starting the envelope cycle</para>
33     <glossseealso otherterm="gloss_adsr">ADSR</glossseealso>
34     </glossdef>
35     </glossentry>
36    
37     </glossdiv>
38    
39 persson 1238 <glossdiv id="gloss_D"><title>D</title>
40 persson 1236
41     <glossentry id="gloss_decay"><glossterm>Decay</glossterm>
42     <glossdef>
43     <para>time value, time span defined for an
44     envelope to fall after rising to a hold state</para>
45     <glossseealso otherterm="gloss_adsr">ADSR</glossseealso>
46     </glossdef>
47     </glossentry>
48    
49     </glossdiv>
50    
51 persson 1238 <glossdiv id="gloss_E"><title>E</title>
52 persson 1236
53     <glossentry id="gloss_envelope"><glossterm>Envelope</glossterm>
54     <glossdef>
55     <para>
56     Definition of time and level values to shape a
57     signal. Most common structure is a so called
58     ADSR-follower. Such an envelope has a rising
59     Attack-time, a first falling Decay time leading
60     to the Sustain level. At the end of the cycle
61     there's a Release time, damping the signal's
62     strength. For example a piano has a rather
63     short Attack time, no Sustain level and
64     a Release time. Strings have varying Attack
65     times as well as varying Decay, they have a
66     Sustain level and very flexible Release time.
67     </para>
68     <glossseealso otherterm="gloss_adsr">ADSR</glossseealso>
69     </glossdef>
70     </glossentry>
71    
72     </glossdiv>
73    
74 persson 1238 <glossdiv id="gloss_L"><title>L</title>
75 persson 1236 <glossentry id="gloss_lfo"><glossterm>LFO</glossterm>
76     <glossdef>
77     <para>
78     Low Frequency Oscillator, an oscillator with very
79     low frequency, typically below 10Hz. Often used
80     with VCAs or VCFs to shape a signal.
81     </para>
82     <glossseealso otherterm="gloss_vca">VCA</glossseealso>
83     <glossseealso otherterm="gloss_vcf">VCF</glossseealso>
84     </glossdef>
85     </glossentry>
86    
87     </glossdiv>
88    
89 persson 1238 <glossdiv id="gloss_R"><title>R</title>
90 persson 1236
91     <glossentry id="gloss_release"><glossterm>Release</glossterm>
92     <glossdef>
93     <para>time value, time span defined for an
94     envelope to fall at the end of an envelope cycle</para>
95     <glossseealso otherterm="gloss_adsr">ADSR</glossseealso>
96     </glossdef>
97     </glossentry>
98    
99    
100     </glossdiv>
101    
102 persson 1238 <glossdiv id="gloss_S"><title>S</title>
103 persson 1236
104     <glossentry id="gloss_sustain"><glossterm>Sustain</glossterm>
105     <glossdef>
106     <para>strength or level value, level of an
107     envelope while being in hold state of an envelope cycle</para>
108     <glossseealso otherterm="gloss_adsr">ADSR</glossseealso>
109     </glossdef>
110     </glossentry>
111    
112    
113     </glossdiv>
114    
115 persson 1238 <glossdiv id="gloss_V"><title>V</title>
116 persson 1236
117     <glossentry id="gloss_vca"><glossterm>VCA</glossterm>
118     <glossdef>
119     <para>
120     Voltage Controlled Amplifier, an amplifier whose amplification
121     depends on a controlling voltage. Instead of making it louder
122     by turning a knob you raise the controlling voltage. Often
123     used in conjunction with Envelopes or LFOs to shape a signal.
124     </para>
125     <glossseealso otherterm="gloss_envelope">Envelope</glossseealso>
126     <glossseealso otherterm="gloss_lfo">LFO</glossseealso>
127     <glossseealso otherterm="gloss_vcf">VCF</glossseealso>
128     </glossdef>
129     </glossentry>
130    
131     <glossentry id="gloss_vcf"><glossterm>VCF</glossterm>
132     <glossdef>
133     <para>
134     Voltage Controlled Filter, a filter whose parameters,
135     for example cutoff frequency, depend on a controlling voltage.
136     Instead of changing the frequency by turning a knob you raise the
137     controlling voltage. Often used in conjunction with Envelopes or
138     LFOs to shape a signal.
139     </para>
140     <glossseealso otherterm="gloss_envelope">Envelope</glossseealso>
141     <glossseealso otherterm="gloss_lfo">LFO</glossseealso>
142     <glossseealso otherterm="gloss_vca">VCA</glossseealso>
143     </glossdef>
144     </glossentry>
145    
146     </glossdiv>
147     </glossary>

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