Qualcomm® aptX™

Consistent, high quality audio over Bluetooth

Young girl lying in a hammock enjoying wireless audio through aptX Bluetooth technology

The tech that delivers a high quality wireless audio experience

The original aptX audio technology powers the wireless sound behind many of the world’s finest devices. So you can stream music from your favourite media services without compromising on sound quality.

aptX audio is a bit rate efficient technology that ensures you receive high quality audio from your Bluetooth® device, for a better listening experience.

Key Features

Consistent audio quality

Fixed compression ratio ensures consistency for wireless audio

Full spectrum of sound

From 20Hz to 20kHz, aptX audio covers the human hearing range

Interoperability testing program

We operate rigorous testing for all aptX-enabled products, so you can be confident all products will deliver the same audio quality

Technical Specifications

Sound quality
  • THD+N@1kHz: -67dB
  • SNR@1kHz:  93dB
  • PEAQ audio quality:-0.18
  • Qualcomm® Kalimba™ MHz DSP technology: 42MHz@48KHz stereo decode ~45MHz@48KHz stereo encode
Audio Encoding
  • 16-bit, up to 48kHz sampling rate
Program memory usage
  • 3.3kwords (encoder) / 3.6kwords (decoder) 
Data memory usage
  • 1.8kwords
  • ~63MHz (stereo encode) on ARMv7A with NEON 
Bit Rate
  • 352kbps (48kHz sampling)

Meet the aptX family

Qualcomm aptX is a product of Qualcomm Technologies, Inc. and/or its subsidiaries.