Nokia-Bluetooth-Stereo-Headset-BH-121-Add this one to the changes or new features that Lumia Denim will bring to entire Lumia Windows Phone 8/ 8.1 range. Seems, with Lumia Denim installed, Lumia owners can enjoy high-quality Bluetooth audio streaming from the phone to supported accessories.

This will be possible because Lumia Denim will enable the aptX audio streaming codec, which makes possible to stream high-quality audio over Bluetooth. One of the FAQ reply by Microsoft support reveals this,

FAQ – Does my Lumia phone support aptX for Bluetooth audio streaming?

Yes, the entire Lumia range with Windows Phone 8 will get an over-the-air update (Lumia Denim) to enable the aptX audio streaming codec.

Lumia Denim update brings goodies from both Windows Phone 8.1 update 1 and Lumia Denim Firmware update in one. Read all about Lumia Denim and Windows Phone 8.1 GDR1 changes at our dedicated page.