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I would be remiss if I didn't point out a huge error in this article... > USB-powered headphones will (in theory) run a lot like Bluetooth headphones which hav
by rplst8 10y ago
I would be remiss if I didn't point out a huge error in this article...
> USB-powered headphones will (in theory) run a lot like Bluetooth headphones which have their own DAC/AMP. Your phone passes the raw data through to the headphones and it does the required converting. This can be a great thing. Instead of relying on a poorly-calibrated DAC in the particular phone that you are using, you can instead move that component to a piece of hardware you can control. So if 24-bit uncompressed audio is your thing you can have it with any audio source. While this increases the cost of the headphones it will also produce better quality audio if you are willing to put some money into it, which is a win in my book.
In this scenario laid out by the author, audio from your music is passed on to a BT device untouched. This is most certainly NOT the case.
Regardless of the format of the source audio, uncompressed (WAV,AUF), lossless compressed (ALAC, FLAC, SHN), or lossy (MP3, AAC, etc.), the data is transcoded and repackaged into the Bluetooth stream. What this means is that lossless audio becomes lossy, and lossy audio gets even more lossy.
The author's assertion that if "24-bit uncompressed audio is your thing you can have it..." is pure B.S. You will be at the mercy of whatever link is between your source device (phone) and your listening device (headset/speaker) and what ever hacking of the audio signal it does.
- Unklejoe 10y agoI thought there was a way to pass an MP3 stream directly over Bluetooth without modifying (transcoding) it? I could be wrong.
- rplst8 10y agoMaybe there is. I've seen references to the ability to encapsulate a compressed stream directly. That said, support for it varies widely. However, uncompressed 24-bit audio is not gonna happen.
- niftich 10y agoThis is theoretically possible. However, every discussion I could find indicates that it's most likely not implemented, as it'd require bypassing the final mixer -- and then you wouldn't get the control blips and phone rings over the A2DP link. [1] http://forum.powerampapp.com/index.php?/topic/7586-bit-perfect-streaming-should-be-possible-with-bluetooth-is-it/ http://forum.powerampapp.com/index.php?/topic/7586-bit-perfe... [2] https://hydrogenaud.io/index.php/topic,104654.0.html https://hydrogenaud.io/index.php/topic,104654.0.html [3] http://android.stackexchange.com/questions/26410/how-do-i-determine-which-a2dp-codecs-my-phone-supports-is-currently-using http://android.stackexchange.com/questions/26410/how-do-i-de... [4] https://discussions.apple.com/thread/6654180 https://discussions.apple.com/thread/6654180 [5] http://www.cnet.com/news/can-aptx-give-you-better-sound-over-bluetooth/ http://www.cnet.com/news/can-aptx-give-you-better-sound-over... [6] http://stereos.about.com/od/Wireless/fl/What-You-Might-Not-Know-About-Bluetooth.htm http://stereos.about.com/od/Wireless/fl/What-You-Might-Not-K...