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View Full Version : Any APT-X bluetooth rumors?



CZ Eddie
11-21-2013, 12:19 PM
Has anyone heard anything about any head units coming out soon that have the APT-X lossless Bluetooth codec? For hi-def wireless audio from our phones to the car stereo?

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What is APT-X?
It's Bluetooth for "Audiophiles".
APT-X Lossless supports high-definition audio up to 96 kHz sampling rates and sample resolutions up to 24 bits.


Key Features
Compression ratio: 4:1
Audio Format: 16-bit, 44.1kHz (CD-Quality)
Data Rates: 352kbps
Frequency Response: 10Hz to 22kHz
Algorithmic Delay: <1.89ms @ Fs 48KHz
Dynamic Range: 16-bit: >92dB
THD+N: -68.8dB


If I had to guess, normal A2DP Bluetooth might sound as good as a 96kbps MP3 file. While APTX Bluetooth sounds as good as a 320kpbs MP3. Essentially, to the trained ears it is a HUGE difference in sound quality.

trumpet
11-21-2013, 02:10 PM
"Normal" Bluetooth streaming music can sound great. Most of my mp3 collection is no less than 256 kbps. I've heard an improvement when going from Bluetooth to the same files on USB, but it's not nearly as bad as you're saying. That said, it does depend on both the Bluetooth in the portable device and the Bluetooth in the head unit. They both have to be good enough.

edit: Regarding APT-X, I have not heard any news about this for aftermarket car audio.