Let’s see here, the fpga does almost 1 TMAC/sec peak. That quite a lot. You’ll need half decent GPU level performance to match that. Now question is: do we need this for 1 million taps at 768 kHz? I mean just technically, not sonically
A million taps would need 768 million MACs. For stereo, this get doubled to 1.5 giga MACs. I have not looked at FMAC speed on Intel CPUs lately but I suspect a single modern core should be able to do this.
It’s not just a little thought. Putting a power supply inside means it’s going to end up a Class I appliance since no one in small volumes will do the testing or use plastic for Class II double insulated rating. Being Class I means your chassis must be bonded to PE. Potentially not ideal for a little box that goes between other boxes and uses unbalanced connections. An external brick makes much more sense for a product like this.
Given the fact that you have to mess with the controls, I am not seeing any stacking opportunity with M-scaler. Tons and tons of low volume high-end gear has internal power supplies (think amplifiers). So see no reason why this didn't go that route. It just looks cheesy and completely out of the norm for target audience to ship an external laptop supply with it.
Aren’t you off by a factor it 1k?
It is a recipe for ground loops with unbalanced connections. If you have multiple Class I appliances you will have multiple connections to PE. You can get away with this sometimes, and no problem if you use balanced connections, but adding more is not better. Those amps you mention are Class I, not II. The only Class II you see tend to be AVRs, TVs, etc. but there is a reason they exist.
Ah yes. You are right.
Since this is a review, I should mention it has a remote. It works fine. Doesn't help the pauses when switching modes, but it does help if you don't want to reach for the buttons. I never really use it since I kept it in 16x mode, so I forgot to send it, sorry!
Ah... you need to get out more over at some other forums and read the endless esoteric debates about third party power supplies for Chord gear -- at Chord prices, of course.
Usual disclaimers apply if your system or ears are insufficiently 'Revealing'.Yes. And at a million taps...aren't we well past the point where it should be done in the frequency domain (where the convolution becomes a multiply)?
Sure, if you were to emulate this on normal hardware/generic CPU hardware, FFT/iFFT would definitely be the faster way to go. It’s really a numbers game, see here how much difference it makes: https://ccrma.stanford.edu/~jos/ReviewFourier/FFT_Convolution_vs_Direct.html
That would bring us almost into TFLOP territory. You’d need a high CPU count i7 or big AMD CPU to get that kind of compute power, or as I stated earlier, a decent GPU… or just see above for a shortcut
Welcome! Do you think that after 36 pages, nobody brought this up already? What enhancements would those be? Where did we see these in the measurements? The 16x dual BNC mode was measured after all...
That is a great post!
Yeah maybe. On the other hand sometimes people are quite content worshiping their religion. But when they set out on missionary quests and the beliefs meet the physical reality things start to spiral off course.
