<?xml version="1.0" encoding="UTF-8" standalone="no"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title>tb</title> <link rel="stylesheet" type="text/css" href="csound.css" /> <link rel="stylesheet" type="text/css" href="syntax-highlighting.css" /> <meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" /> <link rel="home" href="index.html" title="The Canonical Csound Reference Manual" /> <link rel="up" href="OpcodesTop.html" title="Orchestra Opcodes and Operators" /> <link rel="prev" href="system.html" title="system" /> <link rel="next" href="tab.html" title="tab" /> </head> <body> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">tb</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="system.html">Prev</a> </td> <th width="60%" align="center">Orchestra Opcodes and Operators</th> <td width="20%" align="right"> <a accesskey="n" href="tab.html">Next</a></td> </tr> </table> <hr /> </div> <div class="refentry"> <a id="tb"></a> <div class="titlepage"></div> <a id="IndexTb15_init" class="indexterm"></a> <a id="IndexTb14_init" class="indexterm"></a> <a id="IndexTb13_init" class="indexterm"></a> <a id="IndexTb12_init" class="indexterm"></a> <a id="IndexTb11_init" class="indexterm"></a> <a id="IndexTb10_init" class="indexterm"></a> <a id="IndexTb9_init" class="indexterm"></a> <a id="IndexTb8_init" class="indexterm"></a> <a id="IndexTb7_init" class="indexterm"></a> <a id="IndexTb6_init" class="indexterm"></a> <a id="IndexTb5_init" class="indexterm"></a> <a id="IndexTb4_init" class="indexterm"></a> <a id="IndexTb3_init" class="indexterm"></a> <a id="IndexTb2_init" class="indexterm"></a> <a id="IndexTb1_init" class="indexterm"></a> <a id="IndexTb0_init" class="indexterm"></a> <a id="IndexTb15" class="indexterm"></a> <a id="IndexTb14" class="indexterm"></a> <a id="IndexTb13" class="indexterm"></a> <a id="IndexTb12" class="indexterm"></a> <a id="IndexTb11" class="indexterm"></a> <a id="IndexTb10" class="indexterm"></a> <a id="IndexTb9" class="indexterm"></a> <a id="IndexTb8" class="indexterm"></a> <a id="IndexTb7" class="indexterm"></a> <a id="IndexTb6" class="indexterm"></a> <a id="IndexTb5" class="indexterm"></a> <a id="IndexTb4" class="indexterm"></a> <a id="IndexTb3" class="indexterm"></a> <a id="IndexTb2" class="indexterm"></a> <a id="IndexTb1" class="indexterm"></a> <a id="IndexTb0" class="indexterm"></a> <div class="refnamediv"> <h2> <span class="refentrytitle">tb</span> </h2> <p>tb0, tb1, tb2, tb3, tb4, tb5, tb6, tb7, tb8, tb9, tb10, tb11, tb12, tb13, tb14, tb15, tb0_init, tb1_init, tb2_init, tb3_init, tb4_init, tb5_init, tb6_init, tb7_init, tb8_init, tb9_init, tb10_init, tb11_init, tb12_init, tb13_init, tb14_init, tb15_init — Table Read Access inside expressions. </p> </div> <div class="refsect1"> <a id="idm281472882276472"></a> <h2>Description</h2> <p> Allow to read tables in function fashion, to be used inside expressions. At present time Csound only supports functions with a single input argument. However, to access table elements, user must provide two numbers, i.e. the number of table and the index of element. So, in order to allow to access a table element with a function, a previous preparation step should be done. </p> </div> <div class="refsect1"> <a id="idm281472882275288"></a> <h2>Syntax</h2> <pre class="synopsis"><span class="command"><strong>tb0_init</strong></span> ifn</pre> <pre class="synopsis"><span class="command"><strong>tb1_init</strong></span> ifn</pre> <pre class="synopsis"><span class="command"><strong>tb2_init</strong></span> ifn</pre> <pre class="synopsis"><span class="command"><strong>tb3_init</strong></span> ifn</pre> <pre class="synopsis"><span class="command"><strong>tb4_init</strong></span> ifn</pre> <pre class="synopsis"><span class="command"><strong>tb5_init</strong></span> ifn</pre> <pre class="synopsis"><span class="command"><strong>tb6_init</strong></span> ifn</pre> <pre class="synopsis"><span class="command"><strong>tb7_init</strong></span> ifn</pre> <pre class="synopsis"><span class="command"><strong>tb8_init</strong></span> ifn</pre> <pre class="synopsis"><span class="command"><strong>tb9_init</strong></span> ifn</pre> <pre class="synopsis"><span class="command"><strong>tb10_init</strong></span> ifn</pre> <pre class="synopsis"><span class="command"><strong>tb11_init</strong></span> ifn</pre> <pre class="synopsis"><span class="command"><strong>tb12_init</strong></span> ifn</pre> <pre class="synopsis"><span class="command"><strong>tb13_init</strong></span> ifn</pre> <pre class="synopsis"><span class="command"><strong>tb14_init</strong></span> ifn</pre> <pre class="synopsis"><span class="command"><strong>tb15_init</strong></span> ifn</pre> <pre class="synopsis">iout = <span class="command"><strong>tb0</strong></span>(iIndex)</pre> <pre class="synopsis">kout = <span class="command"><strong>tb0</strong></span>(kIndex)</pre> <pre class="synopsis">iout = <span class="command"><strong>tb1</strong></span>(iIndex)</pre> <pre class="synopsis">kout = <span class="command"><strong>tb1</strong></span>(kIndex)</pre> <pre class="synopsis">iout = <span class="command"><strong>tb2</strong></span>(iIndex)</pre> <pre class="synopsis">kout = <span class="command"><strong>tb2</strong></span>(kIndex)</pre> <pre class="synopsis">iout = <span class="command"><strong>tb3</strong></span>(iIndex)</pre> <pre class="synopsis">kout = <span class="command"><strong>tb3</strong></span>(kIndex)</pre> <pre class="synopsis">iout = <span class="command"><strong>tb4</strong></span>(iIndex)</pre> <pre class="synopsis">kout = <span class="command"><strong>tb4</strong></span>(kIndex)</pre> <pre class="synopsis">iout = <span class="command"><strong>tb5</strong></span>(iIndex)</pre> <pre class="synopsis">kout = <span class="command"><strong>tb5</strong></span>(kIndex)</pre> <pre class="synopsis">iout = <span class="command"><strong>tb6</strong></span>(iIndex)</pre> <pre class="synopsis">kout = <span class="command"><strong>tb6</strong></span>(kIndex)</pre> <pre class="synopsis">iout = <span class="command"><strong>tb7</strong></span>(iIndex)</pre> <pre class="synopsis">kout = <span class="command"><strong>tb7</strong></span>(kIndex)</pre> <pre class="synopsis">iout = <span class="command"><strong>tb8</strong></span>(iIndex)</pre> <pre class="synopsis">kout = <span class="command"><strong>tb8</strong></span>(kIndex)</pre> <pre class="synopsis">iout = <span class="command"><strong>tb9</strong></span>(iIndex)</pre> <pre class="synopsis">kout = <span class="command"><strong>tb9</strong></span>(kIndex)</pre> <pre class="synopsis">iout = <span class="command"><strong>tb10</strong></span>(iIndex)</pre> <pre class="synopsis">kout = <span class="command"><strong>tb10</strong></span>(kIndex)</pre> <pre class="synopsis">iout = <span class="command"><strong>tb11</strong></span>(iIndex)</pre> <pre class="synopsis">kout = <span class="command"><strong>tb11</strong></span>(kIndex)</pre> <pre class="synopsis">iout = <span class="command"><strong>tb12</strong></span>(iIndex)</pre> <pre class="synopsis">kout = <span class="command"><strong>tb12</strong></span>(kIndex)</pre> <pre class="synopsis">iout = <span class="command"><strong>tb13</strong></span>(iIndex)</pre> <pre class="synopsis">kout = <span class="command"><strong>tb13</strong></span>(kIndex)</pre> <pre class="synopsis">iout = <span class="command"><strong>tb14</strong></span>(iIndex)</pre> <pre class="synopsis">kout = <span class="command"><strong>tb14</strong></span>(kIndex)</pre> <pre class="synopsis">iout = <span class="command"><strong>tb15</strong></span>(iIndex)</pre> <pre class="synopsis">kout = <span class="command"><strong>tb15</strong></span>(kIndex)</pre> </div> <div class="refsect1"> <a id="idm281472882210104"></a> <h2>Performance</h2> <p> There are 16 different opcodes whose name is associated with a number from 0 to 15. User can associate a specific table with each opcode (so the maximum number of tables that can be accessed in function fashion is 16). Prior to access a table, user must associate the table with one of the 16 opcodes by means of an opcode chosen among <span class="emphasis"><em>tb0_init</em></span>, ..., <span class="emphasis"><em>tb15_init</em></span>. For example, </p> <pre class="programlisting"> <span class="opc">tb0_init</span> 1</pre> <p> associates table 1 with tb0( ) function, so that, each element of table 1 can be accessed (in function fashion) with: </p> <pre class="programlisting"> kvar <span class="op">=</span> <span class="opc">tb0</span>(k_some_index_of_table1) <span class="op">*</span> k_some_other_var</pre> <p> </p> <pre class="programlisting"> ivar <span class="op">=</span> <span class="opc">tb0</span>(i_some_index_of_table1) <span class="op">+</span> i_some_other_var</pre> <p> etc... </p> <p> By using these opcodes, user can drastically reduce the number of lines of an orchestra, improving its readability. </p> </div> <div class="refsect1"> <a id="idm281472882200280"></a> <h2>Credits</h2> <p>Written by Gabriel Maldonado.</p> </div> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="system.html">Prev</a> </td> <td width="20%" align="center"> <a accesskey="u" href="OpcodesTop.html">Up</a> </td> <td width="40%" align="right"> <a accesskey="n" href="tab.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">system </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> tab</td> </tr> </table> </div> </body> </html>