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<TITLE>NOMENCLATURE</TITLE>
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<H2>
NOMENCLATURE:</H2>
In <B>Csound</B> there are nine statement types, each of which provides
a heading for the descriptive sections that follow in this chapter:
<PRE> assignment statements signal generator statements
orchestra header statements signal modifier statements
instrument block statements signal display statements
program control statements soundfile access statements
duration control statements spectral data types</PRE>
Throughout this document, opcodes are indicated in <B>boldface</B> and
their argument and result mnemonics, when mentioned in the text, are given
in <I>italics</I>. Argument names are generally mnemonic (<I>amp, phs</I>),
and the result is denoted the letter <I>r</I>. Both are preceded by a type
qualifier <I>i, k, a</I>or <I>x</I> (e.g. <I>kamp, iphs, ar</I>). The prefix
<I>i</I>denotes scalar values valid at note Init time; prefixes <I>k</I>
or <I>a</I> denote control (scalar) and audio (vector) values, modified
and referenced continuously throughout performance (i.e. at every control
period while the instrument is active). Arguments are <I>used</I> at the
prefix-listed times; results are created at their listed times, then remain
available for use as inputs elsewhere. The validity of inputs is defined
by the following:
<DD>
arguments with prefix <I>i</I> must be valid at Init time;</DD>
<DD>
arguments with prefix <I>k</I> can be either control or Init values (which
remain valid);</DD>
<DD>
arguments with prefix <I>a</I> must be vector inputs;</DD>
<DD>
arguments with prefix <I>x</I> may be either vector or scalar (the compiler
will distinguish).</DD>
<P>All arguments, unless otherwise stated, can be expressions whose results
conform to the above. Most opcodes (such as <B><A HREF="../Modifier/linen.html">linen</A></B>
and <B><A HREF="../Generate/oscil.html">oscil</A></B>) can be used in more
than one mode, which one being determined by the prefix of the result symbol.
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