[linux-audio-user] Selecting Streams Based on a Priority Policy ?

Hi All, Does anyone know of an application that will automatically select a stream from a set of streams that I define, depending on (for instance) there is a certain level of data coming from the stream in question ? I'm looking for something that can handle streams from an internet site, rather than just file based. I'm not particularly bothered where it hooks in to the entire Sound Stack - ALSA, arts, etc, I can work that easily enough myself. I've looked at the feature lists of applications such as like Ardour (http://ardour.soureforget.net/), ProTux (http://www.nongnu.org/protux/), and Audacity (http://audacity.sourceforge.net) have, and they don't quite seem to do what I need, and they seem to be file based, rather than internet stream based. It would be nice if it also had a good (and 'proper') scope associated with it, similar to those shown in the screenshots for the aforementioned Ardour, ProTux, Audacity, and Baudline (http://www.baudline.com). However, if anyone knows of a standalone scope of that ilk, that would tap into either arts, or ALSA output, that would also be great. Iain