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rolandpsp wrote:Also , i see everybody astounded at the UpTone Regen, any reason you aren't using one Nigel ?
Roland

rolandpsp wrote:How do you guys feel about these :

http://highend-electronics.com/products ... transducer

Also , i see everybody astounded at the UpTone Regen, any reason you aren't using one Nigel ?

Is this mod obsolete if going the battery route ? :

https://hifiduino.wordpress.com/2015/07 ... ding-vref/

Can anyone explain why you need two boards to make balanced output ? Also , can you use two boards to make dual mono AND balanced, or just dual mono ?

Would a preamp be required or you can run the raw output straight to an amp ?

I stopped myself from ordering in hopes of getting the OEM as well, any news on that ?

nige2000 wrote:BTW i have botched a fixed clock signal going into the fpga with very very promising results
i aim to either have either fully synchronous from sd card reader to dac or more like visa versa or at least have fixed clk input to fpga

gstew wrote:Synchronization is an interesting thought... feed the clock signal from your USB->I2S card directly into the clock output point of the Si clock chip? Worth a try. The main question is what the FPGA chip will do if it tries to send clock frequency adjustment signals and that doesn't happen. If it gets to the point that it glitches, it could make ugly noises on the output. OTOH, it should never get there.

If your card does not use 22/24 Mhz clocks, you'd have to divide or multiply.

And of course this only works if the clock select function is working, which you'd also have to feed to the DAM from your USB->I2S card. I've seen one post that suggests it is, but never any confirmation of that from Soren.

The other time it might produce ugly outputs is when switching from one clock frequency to the other. Does your USB->I2S also produce a mute signal that you could feed to an output mute relay setup?

i built one into my diyinhk to work synchronously
heres an early build

youve clearly missed the whole point of using lifepo4?

if you dont need the gain there usually aint much use for preamp

rolandpsp wrote:

i built one into my diyinhk to work synchronously
heres an early build

Did you build it from scratch or used dissasembled uptone board ?

youve clearly missed the whole point of using lifepo4?

Most of it anyway. I understand is that it provides the cleanest possible current however it's unclear to me if you've completely bypassed/removed all the onboard power regulators. A detailed explanation of the entire electrical process could be very useful to my knowledge. Also, most of the clock synchronization stuff i don't understand, specifically needing clocks on every part and multiple clocks on some parts and so on, starting with the motherboard and ending with the dac and now the FPGA itself(which you say brings tremendous enhancement).

if you dont need the gain there usually aint much use for preamp

So the raw output is completely and utterly cleanest because of the battery power solution. Why aren't you trying balanced i'm sure you could squeeze more SQ.

Also, are you powering your amplifier with a battery ?