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I just purchased the Lightning to HDMI connector for my iPhone 5S, to connect to my Denon A/V Receiver in the family/tv room (non-audiophile setup) and lo and behold it does not pass bitperfect audio (tested by playing an HDCD album). I tried to do some research and found a blog that mentioned that connector does not even do bitperfect pass-through for HDMI video. According to the blog, the Lightning connector does not have enough bandwidth to handle HD Video and therefore compresses the signal before sending it out to HDMI. But the blog did not mention anything about the audio signal.
Does anyone have any insight on this? The whole reason I was interested in the Lightning connector was because I thought it was a total digital path (as opposed to the 30 pin). Well, that may still be true, but are they mangling the signal before it goes out?
I tested an HDCD album copied via iTunes to my iPhone both as AIFF and ALAC. Please, someone tell me I'm a knucklehead and did something wrong with this process. But can it be that Apple would make a digital connector that does not pass bitperfect audio?
Follow Ups:
Hi,
A solid route to get a bitperfect digital out from any IOS7 device is to use the camera connection kit and a USB DAC or DCC, together with a suitabe software player.
Currently Onkyo HF player is the player to have on iPhone/iPad. With the right kind of DAC you can even play DXD and 384KHz/32Bit and DSD/DSD128.
Ciao T
Sometimes I'd like to be the water
sometimes shallow, sometimes wild.
Born high in the mountains,
even the seas would be mine.
(Translated from the song "Aus der ferne" by City)
The 30-pin WOULD pass digital audio, but the device it connected to (e.g., Wadia's iPod dock, now discontinued) required the manufacturer to buy a license from Apple. Few manufacturers paid up, so the signal most people get from the 30-pin connector had been converted by the iPhone's DAC to analog.
Well, I performed the same test with an iPad 1 with the 30-pin to HDMI connector and did not get bitperfect audio either.
So it would seem even IF the 30-pin could pass digital audio, Apple is still mangling the signal with their HDMI connectors.
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