Building Audio Applications With GStreamer

GStreamer is a project of freedesktop.org. It lets you construct pipelines
of media components to quickly and sanely build audio and video processing
applications. 

This talk will illustrate, using the Python GStreamer bindings, some of the
features of GStreamer and show how to build a quite sophisticated audio 
playback tool for live audio mixing and playback. While the talk uses the
Python bindings, similar bindings exist for many other languages and the 
talk should be generally applicable.

GStreamer has a very nice plugin system - this allows it to handle almost
any form of audio or video from "sources", apply any number of 
transformations to those streams and pass the data out to a variety of 
"sinks".  

The example application (stagewhisper) will show loading sounds in (using 
a Gtk application) combining them, fading them in and out and displaying 
level information. It's in use at a theatre company where the author is the
sound and lighting engineer.