New as I am to high-quality audio, I only recently learned that Bluetooth is a digital transmission method, which raises the question...
Is there a version of Bluetooth that is truly lossless for audio signals?
The closest I have heard of is the AptX (now for reasons I don't understand written Apt-X). Bluetooth seems to be a way to get to the digital output of the iPod source (as a way of "decoding" the 8-pin Lightening Connector, which also presents digital audio in some way).
However, Steve Guttenberg of CNET posts that even the high-end $700 NAD VISO 1 Bluetooth speaker dock for iPods and iPhones evidences a quality degradation from wired connections, suggesting that its Bluetooth audio is subjected to lossy compression.
I also see the moniker A2DP associated with Bluetooth, causing me to wonder if that is similar to, different from, or orthogonal with the Apt (-X).
Thanks for any insight.