blob: c8b1201e2d283d1602610e1940b771de935a6258 (
plain)
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
83
84
|
<refentry id="vdelay3">
<indexterm id="IndexVdelay3"><primary>vdelay3</primary></indexterm>
<refentryinfo><title>Signal Modifiers:Delay</title></refentryinfo>
<refmeta>
<refentrytitle>vdelay3</refentrytitle>
</refmeta>
<refnamediv>
<refname>vdelay3</refname>
<refpurpose>
A variable time delay with cubic interpolation.
</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<para>
<emphasis>vdelay3</emphasis> is experimental. It is the same as <link linkend="vdelay"><citetitle>vdelay</citetitle></link> except that it uses cubic interpolation. (New in Version 3.50.)
</para>
</refsect1>
<refsect1>
<title>Syntax</title>
<synopsis>ares <command>vdelay3</command> asig, adel, imaxdel [, iskip]</synopsis>
</refsect1>
<refsect1>
<title>Initialization</title>
<para>
<emphasis>imaxdel</emphasis> -- Maximum value of delay in milliseconds. If <emphasis>adel</emphasis> gains a value greater than <emphasis>imaxdel</emphasis> it is folded around <emphasis>imaxdel</emphasis>. This should not happen.
</para>
<para>
<emphasis>iskip</emphasis> (optional) -- Skip initialization if present and non-zero.
</para>
</refsect1>
<refsect1>
<title>Performance</title>
<para>
With this unit generator it is possible to do Doppler effects or chorusing and flanging.
</para>
<para>
<emphasis>asig</emphasis> -- Input signal.
</para>
<para>
<emphasis>adel</emphasis> -- Current value of delay in milliseconds. Note that linear functions have no pitch change effects. Fast changing values of <emphasis>adel</emphasis> will cause discontinuities in the waveform resulting noise.
</para>
</refsect1>
<refsect1>
<title>Examples</title>
<para>
Here is an example of the vdelay3 opcode. It uses the file <ulink url="examples/vdelay3.csd"><citetitle>vdelay3.csd</citetitle></ulink>.
<example>
<title>Example of the vdelay3 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/vdelay3.csd.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>
</example>
Two important points here. First, the delay time must be always positive. And second, even though the delay time can be controlled in k-rate, it is not advised to do so, since sudden time changes will create clicks.
</para>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<link linkend="vdelay"><citetitle>vdelay</citetitle></link>
</para>
</refsect1>
<refsect1>
<title>Credits</title>
<para>
<simplelist>
<member>Author: &nameparis;</member>
<member>MIT, Cambridge</member>
<member>1995</member>
</simplelist>
</para>
</refsect1>
</refentry>
|
