由於『純數據』 Pure Data 程式語言功能強大，所寫的程式稱作『補丁』 patch ，所用『物件』仿效物理實物『連線』。實非可用幾篇文章完整說明。因此特先介紹 Johannes Kreidler 之『公開書』
《 Programming Electronic Music in Pd 》
，引用其《 Chapter 1. Introduction to Pd 》中一小段文本，作個 Pd 起點︰
……
In precise terms, Pd is a “real-time graphical programming environment for audio processing“. Traditionally, programmers work with text-based programming languages. They create what is called “code“, which is processed by a computer to produce a result. To carry out its programming functions, Pd uses visual objects that the user places and alters on the screen. These visual objects — small boxes that can be connected to each other — are a throwback to analogue studios that were used to produce electronic music before the advent of computers: various devices — today symbolized by our little boxes — are connected to each other using lines that — like cables — symbolize physical connections between the boxes. (Due to this type of connection, Pd is referred to as a datastream-oriented programming language.)
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One major advantage of Pd is the aspect of “real-time”. This means that, in contrast to most programming environments where a text is first entered that must be separately processed by the computer before obtaining a result, changes in Pd can be made during performance. Like on a classical instrument, the user hears the result instantaneously and can change it immediately. This makes Pd especially well suited for use in live performance.
Pd has become much more than a programming language for electronic music. Since users across the globe can participate in the project, there are user-programmed modules for what are called “externals”: video, Internet connection, joystick integration, etc. Whole libraries of these modules even exist (“external libraries”). Some of these externals have been integrated into the regular version of Pd.
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從 Johannes Kreidler 的簡介裡，或許可以感覺『補丁』的奧妙！也許能夠想像『插頭』 JACK 之魅力乎？
因為 Johannes Kreidler 已於
《 Chapter 2. Programming with Pd for the first time 》文章中
，對這個圖形界面環境之『初學者』的『操作』做了詳細的圖說，作者將不再多作贅敘，還請讀者自己先行閱讀的了。同時告知喜歡讀書的讀者，『絲棉手冊』網上有一本 Pd 的書，可以下載，也可以線上閱讀。