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<refentry id="fmbell">
<indexterm id="IndexFmbell"><primary>fmbell</primary></indexterm>
<refentryinfo><title>Signal Generators:FM Synthesis</title></refentryinfo>
<refmeta>
<refentrytitle>fmbell</refentrytitle>
</refmeta>
<refnamediv>
<refname>fmbell</refname>
<refpurpose>
Uses FM synthesis to create a tublar bell sound.
</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<para>
Uses FM synthesis to create a tublar bell sound. It comes from a family of FM sounds, all using 4 basic oscillators and various architectures, as used in the TX81Z synthesizer.
</para>
</refsect1>
<refsect1>
<title>Syntax</title>
<synopsis>ares <command>fmbell</command> kamp, kfreq, kc1, kc2, kvdepth, kvrate[, ifn1, ifn2, ifn3, \
ifn4, ivfn, isus]</synopsis>
</refsect1>
<refsect1>
<title>Initialization</title>
<para>
All these opcodes take 5 tables for initialization. The first 4
are the basic inputs and the last is the low frequency
oscillator (LFO) used for vibrato. These all default to a
siewave table.
</para>
<para>
The initial waves should be:
<itemizedlist>
<listitem><para><emphasis>ifn1</emphasis> -- sine wave</para></listitem>
<listitem><para><emphasis>ifn2</emphasis> -- sine wave</para></listitem>
<listitem><para><emphasis>ifn3</emphasis> -- sine wave</para></listitem>
<listitem><para><emphasis>ifn4</emphasis> -- sine wave</para></listitem>
</itemizedlist>
</para>
<para>
The optional argument <emphasis>isus</emphasis> controls how long the
sound lasts, or how quickly it decays. It defaults to 4.
</para>
</refsect1>
<refsect1>
<title>Performance</title>
<para>
<emphasis>kamp</emphasis> -- Amplitude of note.
</para>
<para>
<emphasis>kfreq</emphasis> -- Frequency of note played.
</para>
<para>
<emphasis>kc1, kc2</emphasis> -- Controls for the synthesizer:
<itemizedlist>
<listitem><para><emphasis>kc1</emphasis> -- Mod index 1</para></listitem>
<listitem><para><emphasis>kc2</emphasis> -- Crossfade of two outputs</para></listitem>
<listitem><para><emphasis>Algorithm</emphasis> -- 5</para></listitem>
</itemizedlist>
</para>
<para>
<emphasis>kvdepth</emphasis> -- Vibrator depth
</para>
<para>
<emphasis>kvrate</emphasis> -- Vibrator rate
</para>
</refsect1>
<refsect1>
<title>Examples</title>
<para>
Here is an example of the fmbell opcode. It uses the file <ulink url="examples/fmbell.csd"><citetitle>fmbell.csd</citetitle></ulink>.
<example>
<title>Example of the fmbell 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/fmbell.csd.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>
</example>
</para>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<link linkend="fmb3"><citetitle>fmb3</citetitle></link>,
<link linkend="fmmetal"><citetitle>fmmetal</citetitle></link>,
<link linkend="fmpercfl"><citetitle>fmpercfl</citetitle></link>,
<link linkend="fmrhode"><citetitle>fmrhode</citetitle></link>,
<link linkend="fmwurlie"><citetitle>fmwurlie</citetitle></link>
</para>
</refsect1>
<refsect1>
<title>Credits</title>
<para>
<simplelist>
<member>Author: &namejohn; (after &nameperry;)</member>
<member>University of Bath, Codemist Ltd.</member>
<member>Bath, UK</member>
</simplelist>
</para>
<para>New in Csound version 3.47</para>
<para>Optional argument new in 5.16</para>
<para>More optional argument new in 6.0</para>
</refsect1>
</refentry>
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