First Commit

3rdparty/sdl/SDL/examples/audio/02-simple-playback-callback/README.txt

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+If you're running this in a web browser, you need to click the window before you'll hear anything!
+
+This example code creates a simple audio stream for playing sound, and
+generates a sine wave sound effect for it to play as time goes on. Unlike
+the previous example, this uses a callback to generate sound.