Dubbed the TrueWireless Stereo and based on CSR's BlueCore5-Multimedia platform, the software development kit uses two Bluetooth devices, one as the master and the other as the slave.

The call handling and control are supported on the master device which then relays the audio stream to the slave headset. This allows the product to work with any existing A2DP device already on the market.

Audio is streamed from the audio source to the master unit and is relayed to the slave using CSR's proprietary synchronization protocol, resulting in truly wireless stereo sound to either a headset or speakers.

An important feature of the kit is the incorporation of audio enhancement technology for improved audio quality through a microphone and clearer audio through the earpiece through noise cancellation. TrueWireless stereo also supports Bluetooth version 2.1 + EDR along with sub-band coding or MP3 audio file formats.

The software development kit has already attracted interest from a number of tier one customers, according to Anthony Murray, senior vice president for the audio and connectivity strategic business unit at CSR.