Making Musical Apps : libPd

I bought a book from O’Reilly, “Making Musical Apps”.
It turned out that it was about an open source library called libpd.
On their introduction page, they explain it as “A real-time graphical programming environment for audio, video, and graphical processing.” Wow.. it sounds very broad.

Why is it called Pure Data? Is it about data? Then why do they explain it as “a graphical programming environment for audio, … “? is it something like to create patch for images and audio like Core Images and Core Audio on Mac?

After reading several pages of the O’Reilly book, it looks better than those from Apple’s. However I still don’t get how broad its coverage area is. Name-wise, it sounds similar to Core Data. “Graphical Programming” sounds like “Object-Graph” in Core Data ( There is no graphical representation in setting relationship among “data” in Core Data like they do with Core Image patch and Quartz Composer. )

Anyway, I would like to posts some article and the web site of libpd here for future reference.

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