LE Audio

LE Audio

<\/script>\n
'; }, get iframeSnippet() { const domain = '{ SITE_DOMAIN }'; const type = '{ embed_type }'; const slug = '{ embed_slug }'; return ''; }, get activeSnippet() { return this.method === 'script' ? this.scriptSnippet : this.iframeSnippet; }, copySnippet() { navigator.clipboard.writeText(this.activeSnippet).then(() => { this.copied = true; setTimeout(() => { this.copied = false; }, 2000); }); } }" @keydown.escape.window="open = false" @click.outside="open = false">

Embed This Widget

Theme


      
    


    
    

      Widget powered by
      .
      Free, no account required.
    

  





    
    

    
    

      
Bluetooth audio specification built on BLE, featuring the LC3 codec, isochronous channels, and broadcast audio (Auracast).

    


    
    
    

      다른 명칭:
      
      BLE Audio
      
    

    
  


  




  
  

    
LE Audio


LC3 codec and Auracast." data-category="LE Audio">LE Audio is a Bluetooth audio specification built entirely on top of Bluetooth Low Energy, introduced in the Bluetooth 5.2 Core Specification. It replaces the Classic Bluetooth audio stack (A2DP, HFP) with a modern architecture that delivers higher audio quality at lower bitrates, multi-stream support, and broadcast capabilities.


Core Architecture


LE Audio is constructed from several layered profiles and protocols. At its foundation sits the LC3 codec, which provides perceptually superior audio quality compared to SBC at roughly half the bitrate. Audio data flows through Isochronous Channels -- time-bounded logical transports that guarantee deterministic delivery for latency-sensitive streams.


Two transport modes are defined. CIS (Connected Isochronous Stream) handles point-to-point unicast audio between paired devices, such as a phone streaming to earbuds. BIS (Broadcast Isochronous Stream) enables one-to-many broadcast audio without requiring connections, forming the basis of Auracast.


The profile hierarchy starts with BAP (Basic Audio Profile), which defines unicast and broadcast procedures, and extends to CAP (Common Audio Profile) for coordinated set operations such as stereo earbud pairing. The ASCS service manages stream endpoints and codec configuration on the peripheral side.


Key Advantages Over Classic Audio


LE Audio introduces several capabilities unavailable in Classic Bluetooth audio. Multi-stream support allows independent audio streams to each earbud, enabling true stereo rendering and transparent hearing aid mode. Broadcast audio (Auracast) opens entirely new use cases in public venues. The LC3 codec achieves equivalent quality to SBC at 160 kbps versus 345 kbps, significantly reducing radio-on time and power consumption.


Hardware Support


LE Audio requires Bluetooth 5.2 or later silicon. Chips such as the nRF5340 and nRF54H20 provide dedicated audio processing cores. On the mobile platform side, Android 13+ and iOS 17+ include LE Audio support, though device adoption is still progressing. Developers targeting LE Audio should select an SDK with full isochronous channel support, such as the nRF Connect SDK with Zephyr.

  

  

  
  
  




  
  
Related Terms

  

  

    
    LC3
    
    Isochronous Channels
    
    Auracast
    
    Audio Stream Control
    
    BAP
    
    CAP
    
    EATT
    
  





  

  
  

  
  

  
  
  

    
Related Content

    

      
      
        

          
          
What Is Bluetooth Low Energy? A Complete Introduction

          
          Getting Started
          
        

        
        
        
…life (coin cell) Months–years Hours–days Audio support LE Audio (BT 5.2+) A2DP/HFP BLE Use Cases BLE's low-power profile…

        
      
      
      
        

          
          
BLE Version History: From 4.0 to 6.0 Compared

          
          Getting Started
          
        

        
        
        
…), GATT caching, advertising set randomization 5.2 2020 LE Audio , LC3 codec, Isochronous Channels , CIS / BIS 5.3 2021…

        
      
      
      
        

          
          
LE Audio: The Next Generation of Bluetooth Audio

          
          Mesh & Audio
          
        

        
        
        
LE Audio Overview LE Audio is the audio framework built on…

        
      
      
      
        

          
          
BLE in Wearables: Fitness Trackers, Watches, and Hearables

          
          Industry Applications
          
        

        
        
        
…architectures, companion app design patterns, and the LE Audio subsystem that replaced Classic Bluetooth in modern…

        
      
      
      
        

          
          
BLE Privacy Features: Address Randomization and IRK

          
          Security & Privacy
          
        

        
        
        
…For product designs involving LE Audio or hearables, BLE Privacy interacts with hearing aid…

        
      
      
    

  

  

  
  




  
자주 묻는 질문


  

    
    

      
      

        
Our glossary covers 90+ BLE technical terms organized by category. Each term includes a definition, related terms, and links to relevant chips and guides.