Infiniteloop said:
andyjm said:
Infiniteloop said:
"At the risk of being inflamatory, my best guess is that expectation bias is the most likely reason for your perceived 'improvements'. "
Which is exactly what I said at the beginning that I would be accused of.
The thing is, without hearing the Regen in place in a system, you have no way of knowing if it makes a difference. You can only guess that it won't.
In other words, you too have an expectation bias.
The difference is, I have heard it and you haven't. And having heard it I can pinpoint where the differences are.
True, I haven't heard it. But I have designed digital audio systems for a living, and I know a thing or two about electronics.
You have chosen a decent DAC/Amp that neither uses the USB timing information nor the USB power supply - the two things that your USB box is supposed to improve. Given this, the balance of probability that the box is improving an unspecified 'something else' vs the probability that it is expectation bias on your part comes down heavily in favour of expectation bias.
Seems pretty straightforward to me.
As a Digital Audio System designer, isn't your interest piqued just a little? Surely we cannot know everything there is to know about Digital? In theory maybe, but in practice? - Not even a scientist would agree to that.
Do most Audio companies develop products by measurements alone, or is the fine tuning always done by listening before the product gets launched?
You mention measurements. I couldn't find a single measurement on the USB box. RMS or peak jitter? nothing. Spectral distribution of jitter? nothing. USB supply rail ripple? nothing. USB supply rail switching noise? nothing. So, not unreasonably, I begin to wonder about the device's performance.
As for listening, the listening tests I have participated in have been carefully controlled, in acoustically treated rooms. Repeated substitution of components, performed without the listeners being aware of the substitution. Statistical analysis of results. My guess is that your testing regime was less rigorous.
I don't want to seem argumentative, but you have a damn good Amp/DAC that the designer's have taken some care to make immune to the vagaries of USB links. You have attached a very questionable USB box, with no published spec, that even if it does what it says, won't impact your setup in any way.
I remain surprised that you can't see the illogical nature of your viewpoint.