[TLS1]

  Dear Mr Watts,
 
Firstly, a huge thank you for Hugo. I've never heard anything like it and I've never had any one component that single handedly improved my speakers and my headphones to such an extent.
 
I'm reviewing the Hugo for a French-language audio magazine, and I understand that your WTA filter accounts for much of the Hugo's naturalness. I would like to better understand what is meant by "tap length" ? Could you describe this in layman's terms ?
 
Thanks in advance,
 
Jan

 
Jan, I look forward to read your review of the Hugo! 

 

 

[Racy]

Jan, I look forward to read your review of the Hugo!   

+1

 

[seeteeyou]

.

 

[SoundFreaq]

Yet another slightly revised chassis, more cables and the box is in black this time

http://samaudio.co.kr/bbs/board.php?bo_table=01hifi_news&wr_id=141

We better hold the tiger for now, LOL

 
Packaging must be all over the place. My first Hugo, from the first run had a black box and limited accessories. My second, still original chassis, all the extra accessories, same black box. 
 
Edit: Also noticed they swapped out the power supply on the UK units. I think the original was discontinued? The new one is slightly less power at 6 watts and .5 amps. I believe the US and first UK supplies rate at 7.2W and .6 amps. Everything 12 volt. 

 

[SleepyOne]

Yet another slightly revised chassis, more cables and the box is in black this time

http://samaudio.co.kr/bbs/board.php?bo_table=01hifi_news&wr_id=141

We better hold the tiger for now, LOL

 
Not really. Looks like very very early original chassis vs the current revised chassis. I think the original box is white colour and the later ones has black box (the box for my revised chassis Hugo is black) - Phil at custom cables has posted example of that awhile back. There are more stock cables there than are on mine. My power supply is 12V 0.5A, see below:
 
http://www.powerpax.co.uk/power-supplies/plugtop-power-supplies/plugtop-power-supplies

 

[CosmicHolyGhost]

I get a little sour whenever I see other people Hugo have bigger RCA holes than mine....

 

[SoundFreaq]

   
Not really. Looks like very very early original chassis vs the current revised chassis. I think the original box is white colour and the later ones has black box (the box for my revised chassis Hugo is black) - Phil at custom cables has posted example of that awhile back. There are more stock cables there than are on mine. My power supply is 12V 0.5A, see below:
 
http://www.powerpax.co.uk/power-supplies/plugtop-power-supplies/plugtop-power-supplies

 
What is your model number?
 
From what I can tell, the very first UK power supplies (PowerPax SW3511 - 7.2W/600mA). Seem to be discontinued? UK units shipping now with SW4009E (6W/500mA)
 
US versions ship with Volgen KTPS05 - 12006U (7.2W/600mA)

 

[SleepyOne]

SW4009E (6W/500mA) 12V

 

[SoundFreaq]

So the only difference would be that it would charge just an intsy bit slower. Probably better for the battery, but have you noticed any battery depletion while plugged in and running full tilt?

 

[SleepyOne]

I am not 100% sure but after playing a long time with the charger plugged in, there maybe some battery depletion. I mean when I turned off Hugo the white light indicating recharging is on, thus suggesting battery not at full charge. However I have no idea how much of the battery has been used. I guess that just means power consumption is a bit faster than recharge rate.

 

[weisse muller]

Interesting. Can you say more about the Italian company and their role ?i was told that it was they that wrote the hugely complicated software that controls the high datarate USB I believe they cooperated with Mr watts but this was a large task in itself this was organised through Chord Electronics development team,as was the project management and the precise definition of what Hugo is and what it does. I'm not diminishing Mr Watts huge input to this project, but Hugo exists because of a team of people with inputs into the design from people around the world especially Japan. It's not just one persons great idea as perhaps some of you are believing.

Thanks,

Jan

 

[HYHY]

Sry for the random question but am I right that the moon audio black dragon cable with 3 pole 1/8" mini termination for hifiman should work for the ak240 output to the chord hugo coaxial input?

 

[seeteeyou]

.

 

[Racy]

Since Hugo could be the only amp out there with all audio jacks sharing an identical output path, it would be mighty interesting to conduct an experiment.

We could get some GPOCC as well as silver/OCC in bulk, and that should cost 25 bucks a pop plus shipping

http://www.ebay.com/itm/121146661900
http://www.ebay.com/itm/111123401419
http://www.ebay.com/itm/111123390196
http://www.ebay.com/itm/111123392113
http://www.ebay.com/itm/121146658156
http://www.ebay.com/itm/111123395411

http://www.clairvoyantcables.com/id81.html

http://www.ebay.com/itm/111123443200
http://www.ebay.com/itm/111123441450
http://www.ebay.com/itm/111123440617

Let's say we're making a pair of headphone cables for LCD-X since its synergy with Hugo should be incredible. That means we're making two identical cables as follows:

Left-channel = terminate Hugo's end with Furutech CF-126 RCA connector / LCD-X's end with 4-pin mini XLR

Right-channel = terminate Hugo's end with Furutech CF-126 RCA connector / LCD-X's end with 4-pin mini XLR

Theoretically speaking, is that a good idea for better channel separation when we're physically splitting both left / right channels with two different wires from one end to another instead of joining both channels into the same 6.3-mm connector?

Usually that's only doable with balanced rigs such as driving Abyss with Liquid Gold, but now we could consider the single-ended with LCD-X (or anything else) with Hugo. If the bulk wire mentioned above were indeed showing noteworthy improvement, I'll definitely go for a similar flavor with Platinum Eclipse 7 instead.

Rather than terminating one end with RCA connector, we could also opt for XLR instead and then make some adapters for either balanced or single-ended outputs. We could terminate those adapters with a single TRRS (2.5-mm or 3.5-mm) connector, a single Kobiconn / Hirose connector, a single 6.3-mm connector, a single 3.5-mm connector, or a pair of RCA connectors.

Brilliant idea!!!

 

[harmonix]

Thanks.

I will try to explain simply, but it is not easy. The interpolation filter is an FIR filter. This has delayed audio data. Each delayed data is multiplied by a coefficient, and all these multiplications are summed together, and the summed result is the interpolated value. Now the delayed data is held in a delay line, and is tapped into by a multiplier - hence the term taps. The coefficient is calculated by an algorithm, and in Hugo this is the WTA algorithm. This has been developed over many years, and what I am trying to do is maximize the sound quality performance, by improving the way the timing is reconstructed.  

Now if you look at the mathematics, if you want to reconstruct the original bandwidth limited perfectly (that is all the timing of transients will be perfectly reproduced) then you need an infinite number of taps for the filter. When you start reducing the number of taps, then the timing accuracy degrades, which has very important subjective consequences. Hugo has the highest tap length filter of any DAC available at any price, which as you identify, is one substantial reason for it's naturalness. With Hugo, it has a 26,368 taps. This means for every sample of CD data, there are 26,368 multiplications and additions going on. To do this, I use 16 customized parallel DSP cores, each one running at 208 MHz. So there is a lot of DSP horsepower in Hugo.  

Rob - given the computation power and low consumption of these spartan fpga - any plans to do a deck for the shelf with multiple Spartans running on a battery psu?