Thank you ...I was getting to the point of thinking it was my fault For expecting more from Topping ..I am just a customer who should lighten up and have a good day..No one seemed to think ..just maybe ...it was toppings fault..?..
Ok. Thank you too.
If you have not read my responses anywhere else on the forum:
Since last year, I was already seeing reports of incompatibility of SPDIF input from both our and our competitors devices that use ESS's SPDIF receiver in the ESS DAC chips. In the winter time, I went and bought 7 cheapest that I could find+some existing USB to SPDIF converters. All of them except one which is just broken work with all of our DACs. And this is before AKM factory fire. So we have not switched to CS8416 on any product yet. The conclusion at the time was if these cheap converters could work. It is not a big concern.
Earlier this year after D30pro released, there are reports of CD players being incompatible. A test using AP's jitter generator was performed. At the time 30ns of jitter was still stable with CS8416 used in D30pro. So at that moment the conclusion was CD players can have extremely large jitter.
After some time complaints getting more and more. We purchased one CD player that's having issue with D30pro and tested it. It indeed didn't work. And the jitter of this CD player is high but not 30ns high. So there may be different issues. Nevertheless we tried increasing the PLL circuit's BW. It still didn't work. After some pairing with different devices. We found that any product with ESS's own spdif receiver, XMOS implementation of spdif receiver, Cirrus Logic's reciever don't work. This includes a few of our competitors. And we found LC89091 works with it. So after some extensive testing, it's later on used in D90SE.
E30 changed receiver around the time of production of D30pro. It's used at the time because we have used it before and we thought it's very stable due to no complaint in this issue from our older D30.
It is still not known what's exactly the issue. But from the information we got, majority of the devices work just fine. Some devices don't work. You could say why it works with other DACs. Then I could say why it is just this CD player doesn't work. Often time TV's spdif out can also have compatibility issure. If you look for reports from users. There are many reports of them working. And you know people only complains when things don't work. If majority of the time it doesn't work. Our customer service wouldn't be able to answer your email, would it?
Our current solution is to use LC89091 when we can. There is not a lot of stock either. So it's difficult. The best case scenario is we would be able to use AK4118 again next year. But that's still a question. There are also some reports of incompatibility of LC89091 but either it's actually much less or it's because D90se is more expensive. We don't know. We still have to continue evaluate the chip even.