1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
|
<refentry id="rspline">
<indexterm id="IndexRspline"><primary>rspline</primary></indexterm>
<refentryinfo><title>Signal Generators:Linear and Exponential Generators</title></refentryinfo>
<refmeta>
<refentrytitle>rspline</refentrytitle>
</refmeta>
<refnamediv>
<refname>rspline</refname>
<refpurpose>
Generate random spline curves.
</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<para>
Generate random spline curves.
</para>
</refsect1>
<refsect1>
<title>Syntax</title>
<synopsis>ares <command>rspline</command> xrangeMin, xrangeMax, kcpsMin, kcpsMax</synopsis>
<synopsis>kres <command>rspline</command> krangeMin, krangeMax, kcpsMin, kcpsMax</synopsis>
</refsect1>
<refsect1>
<title>Performance</title>
<para>
<emphasis>kres, ares</emphasis> -- Output signal
</para>
<para>
<emphasis>xrangeMin, xrangeMax</emphasis> -- Range of values of random-generated points
</para>
<para>
<emphasis>kcpsMin, kcpsMax</emphasis> -- Range of point-generation rate. Min and max limits are expressed in cps.
</para>
<!--
<para>
<emphasis>xamp</emphasis> - Amplitude factor
</para>-->
<para>
<emphasis>rspline</emphasis> (random-spline-curve generator) is similar to <link linkend="jspline"><citetitle>jspline</citetitle></link> but output range is defined by means of two limit values. Also in this case, real output range could be a bit greater of range values, because of interpolating curves beetween each pair of random-points.
</para>
<para>
At present time generated curves are quite smooth when <emphasis>cpsMin</emphasis> is not too different from <emphasis>cpsMax</emphasis>. When <emphasis>cpsMin-cpsMax</emphasis> interval is big, some little discontinuity could occurr, but it should not be a problem, in most cases. Maybe the algorithm will be improved in next versions.
</para>
<para>
These opcodes are often better than <link linkend="jitter"><citetitle>jitter</citetitle></link> when user wants to <quote>naturalize</quote> or <quote>analogize</quote> digital sounds. They could be used also in algorithmic composition, to generate smooth random melodic lines when used together with <link linkend="samphold"><citetitle>samphold</citetitle></link> opcode.
</para>
<para>
Note that the result is quite different from the one obtained by filtering white noise, and they allow the user to obtain a much more precise control.
</para>
</refsect1>
<refsect1>
<title>Examples</title>
<para>
Here is an example of the rspline opcode. It uses the file <ulink url="examples/rspline.csd"><citetitle>rspline.csd</citetitle></ulink>.
<example>
<title>Example of the rspline opcode.</title>
<para>See the sections <link linkend="UsingRealTime"><citetitle>Real-time Audio</citetitle></link> and <link linkend="CommandFlags"><citetitle>Command Line Flags</citetitle></link> for more information on using command line flags.</para>
<xi:include href="examples-xml/rspline.csd.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>
</example>
</para>
</refsect1>
<refsect1>
<title>Credits</title>
<para>Author: &namegabriel;</para>
<para>New in version 4.15</para>
</refsect1>
</refentry>
|
