Chosen Solution
Will you be including a teardown of the adapter? to reveal if there is a dac/amp in it
Based on logic, it is CERTAIN that this thing does include a DAC, why? This adapter works on every iOS device since iPhone 5. If there are modifications allowing iPhone 7 to output analog signals through Lightning, the modifications certainly cannot be on iPhone 5. So the DAC has to be inside the connector. All you need is a Lightning interface chip/DAC combo, which can be put inside the Lightning plug, then the front amps for headphones, which are usually on the audio jack flex (check iPhone dock flex assembly or iPad mini audio jack assembly). It may be a challenge to shrink them to fit into this adapter, but it is still possible. I’m more interested in audio quality though. Can this thing be at least on par with regular iPhone audio jacks? The following is the lightning interface chip “Tristar” on iPhone 5. There is no analogy audio signals connected to the chip, so it is not possible to output analog audio through Lightning at all.
Yes. The adapter includes a DAC and some kind of low-power analog amplifier. The lightning port doesn’t support analog audio unfortunately.
https://www.youtube.com/watch?v=UpMQguv-… The answer is 338S00140 / A0MU1621 / TW chip.
There apparently is a DAC as shown in this video. https://www.youtube.com/watch?v=UpMQguv-… Can anyone verify the chip numbers? I can’t seem to find anything.
Lightning is software controlled smart port. It is totally capable of routing any signal the iPhone can produce. So a simple software update will support whatever changes to Lightning Apple introduces. When I plugged my Lightning headphone adapter into my SE, I initially received the message that it was not compatible, which required me to upgrade to iOS 10. That would not have been necessary unless Apple changed something about their MFi specs, as they already have published specs for Lightning audio. So it should have just worked. The fact that it didn’t means Apple wasn’t following their own MFi specs, or CHANGED them. There is no difference in the sound from my headphone jack to the adapter. Since we know the iPhone 7 uses the same DAC chipset as the 6s, that would seem to suggest they intend to output a higher quality analogue signal than the iPhone 7 actually needs. The presence of 3 amps is highly suspect as well.
No,I thought there do not have DAC inside. This Lightning to 3.5 adapter most like analog signal bypass adapter. Just bypass audio signal thru lightning connector (pin6,7,8, and 1). I don’t have evidence but my point as below : 1.There don’t have enough space can put USB to I2S to Analog chipset. 2.Belkin just announced the new product named “Lightning Audio + Charge RockStar” This new accessory look like implement the Lightning Audio Module(LAM) (48KHz/24bit) The audio out put of the Lightning female is Analog signal. This accessory also can work with Apple original Lightning to 3.5 adapter & headphone If Lightning to 3.5 adapter include DAC ,how it can work with Belkin’s new product? Jimmy Tsai@C4M
