On the performance of an audio live streaming application

I would like to develop an application that will allow a user to live streams audio from his computer and broadcast it through the network.

My main concern is the performance of this application. I want the quality of the sound to be preserved as its highest and I would like as few "delay" as possible.

Can I reach such a level of performance with web-based languages such as AJAX, NodeJS, or Ruby (Ruby on Rails?) or should I consider more low-level languages such as C/C++?

Thanks!