Updated Summer 2009 The SDK includes the X-RAM Extension, the Effect Extension (EFX), Multi-Channel Buffer playback extension, and a new Device Enumeration extension that allows AL to be rendered on any installed soundcard / audio end-point. The SDK includes a new sample application that shows how to use OpenAL to render the output from a software audio mixer into a streaming multi-channel Source and, optionally, several mono'effect bus' Sources for sending to an auxiliary effect (e.g. reverb).