But seriously what do you expect to learn from ASR community in regards to HQP? SNR measurement on selection of filters we rarely use with conclusion that all HQP benefits are in ultrasonic range and there’s no sense in using it? And certainly test with Topping, most likely on ESS chip, that would not make sense.
You may also search ASR to see a huge Jussi’s disagreement with their key measurements, saying it’s not representative enough and they are not taking bandwith into account. In return community picked on Jussi as he does not want in his own full right to disclose his measurement rig, so ASR says his measurements are not credible… frankly its just funny because ASR just picking on words and not taking into account the core argument. Quick summary from ASR - oversampling is stupid and not needed.
If you search on the net for “archimago hqplayer” you will find a very decent review from Archimago with measurements already, And if I’m not mistaken his measurements has been also discussed on this forum. Quick summary from that - HQPlayer does quality job (especially with DSD/SDM)
And for the difference in 5EC vs 7EC vs 5ECv2 and 7ECv2, well I think non-bias blind testing with sufficient statistical data may answer the concerns for those who doubt that there is a difference.
PS: Saying above I have a huge respect to the work that Amir is doing, it is immense, I have rebuild my system pretty much completely based on his research and I’m “sponsoring” ASR, but you really need to take some things from them with a pinch of salt,
EDIT: Here. I found discussion on this forum already