Audio conferencing functionality offered by VoxImplant is one of the most advanced and flexible audio conferencing implementations you can find. Developers have full control of every call connected to the conference via VoxEngine. For example, it's possible to record particular calls connected to the conference or the whole conference, developers can record only one audio stream that goes to the conference (if you need to get the audio from particular participant). It's possible to play audio file (or TTS) into the conference or to particular participant (call connected to the conference), mute/unmute participants, and even join different conferences together. Our Web SDK lets developers create web client applications for the conference in minutes (WebRTC will be used Chrome/Firefox/Opera or Flash in IE/Safari), same with Mobile SDKs. It's possible to implement convenient conference controls using messaging functionality (inside the call). In addition, SIP software and devices can be connected to the conference. It's hard to imagine audio conferencing service you can't build using VoxImplant. There are only few things we haven't finished yet - wideband audio support and voice activity detection (both are being developed by our brilliant engineering team, so they should become available soon).