lojay said:

Or a couple more days to find that one song that will give you the "holy schiit" moment you were looking for...

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Or 5 years and a week in my case. Damn my budget!  

lojay said:

I am no electrical engineer but for the sake of probing into the question, my hypothesis is that, the issue with R2R it seems is that resistance varies with temperature and thus accuracy of the getting the signal done right in multi bit DACs. S-D designs get around that problem with real life performance of resistors but introduce other problems of their own. The engineering issue is therefore not to get the DAC sufficiently hot (eg the suggestion that you could just heat the thing with a heater) but to achieve thermal stability, ie to get the Yggy at the same temperature constantly, which may require a longer power on period. So while the Yggy doesn't sound bad at all shortly after startup, to achieve its best sound it may require days to stabilise the temperature of the components.

The question I have is therefore is whether one needs days of warm up to achieve thermal stability?

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"Thermal stability" seems to be the reason for being powered 24/7….  
 
In my experience, some components also require time to 'settle in' too… for instance, my High Fidelity Ultimate cables take a few days to get back to optimum SQ if unplugged & replugged in… say if you swap a piece of gear..

eee pee said:

I bet Mike wishes he didn't put a power switch on this thing. His old Thetas don't have them. On all the time.

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My borrowed Gen VA sure does… pretty sure it's mandatory to have them… 

joeexp said:

  Does the Yggy sound as good/or better then the MSB Analog??
This is the $2299 question!
 
They have been around a while now - we want comparisons…...

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There have been mentions & comparisons… myself & others..

wino said:

  My borrowed Gen VA sure does… pretty sure it's mandatory to have them… 

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On my Gen V the analogic section stays warm even if the switch is set to OFF. It effectively needs to be powered off from the mains to achieve that effect.

negura said:

   
On my Gen V the analogic section stays warm even if the switch is set to OFF. It effectively needs to be powered off from the mains to achieve that effect.

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Guess that proves the point, haha !  Mike wants those babies on 24/7 !
 
As a side note… don't know what peeps are getting on about, in reference to Yggy running 'hot'… mine is on 24/7 w/ a load (while breaking in) & is like Switzerland… neutral heat.. neither warm nor cool to the touch… the PSs on MSB Analog & the upper DACs run much hotter by comparison..
 
David

I'm well over 200 hours of burn in.
 
When I first plugged in the Yggdrasil the sound was amazing already, big lows, clean mids, and crystal clear highs.  As it matured the lows became a bit more subdued but that brought out more resolution and volume to the sound - Everything became more musical and omnipresent.
 
The only way I can really describe the Yggdrasil now is as "invisible" it makes my entire system disappear.  With the appropriate source files you swear your right there in the audience, in the studio, in the sound booth.  The Yggdrasil is no longer allowing me to listen to music but experience it.

wino said:

Guess that proves the point, haha !  Mike wants those babies on 24/7

David

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Funny thing my Yggdrasil's power switch was set to on when I got it. I took it as a subtle hint.

eee pee said:

I bet Mike wishes he didn't put a power switch on this thing. His old Thetas don't have them. On all the time.

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That may not be so easy nowadays. Latest EU regulations mandate a max of 0.5W in standby. Afaik, the only way around that is to not provide standby at all .. which may also be forbidden soon. A bit crazy around here but I can understand the motives.

lojay said:

I am no electrical engineer but for the sake of probing into the question, my hypothesis is that, the issue with R2R it seems is that resistance varies with temperature and thus accuracy of the getting the signal done right in multi bit DACs. S-D designs get around that problem with real life performance of resistors but introduce other problems of their own. The engineering issue is therefore not to get the DAC sufficiently hot (eg the suggestion that you could just heat the thing with a heater) but to achieve thermal stability, ie to get the Yggy at the same temperature constantly, which may require a longer power on period. So while the Yggy doesn't sound bad at all shortly after startup, to achieve its best sound it may require days to stabilise the temperature of the components.

The question I have is therefore is whether one needs days of warm up to achieve thermal stability?

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No EE either but your hypothesis about the r2r network needing time to stabilize makes sense. Clocks need time too, prolly some caps and who knows what else. But 4-5 days surely sounds kinda funny .. atomic clocks stabilize faster than that!
Anyway, still waiting for someone to stop their Iggy and report.. preferably not in purrin's words.

purrin said:

YOU HAVE ARRIVED. NO ONE ELSE BELIEVED ME. BEYOND WORDS. NOTHING ABOUT THE DAC OR HOW IT SOUNDS MATTERS ANYMORE. MY WORK IS DONE. ONLY NEEDED ONE OTHER PERSON TO EXPERIENCE THIS.

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Every iggy owner be aware ... your next cookie belongs to purrin .
You can surely have mine, even if I'm not an owner .. yet. But be aware that I'm very partial to choco

Two things to address: 1) Polarity and its Inversions  2) Warm-Up vs. Burn-In and the Yggy  (a question addressed to @baldr himself)
 
1) Polarity
 
Thank you, Mr. Moffat, for that magic button on the left. What this provides is a quick and easy means for comparison, something my software of choice does not afford.
I've been using it a lot lately, and count me surprised. The number of rebook recordings which benefit from this astound. Upthread I said the following:
 

Originally Posted by dglow /img/forum/go_quote.gif
 
Upthread somebody expressed the desire for an online database of recordings known to have incorrect polarity. I'm happy to mark up my library with metadata and leave it at that. But no OCD auditioning of another hypersubtledigitalminutia setting, please.
 
Question: can anybody detect the polarity change with headphones? I've only be able to do so with speakers.

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I was wrong on both counts: headphones do matter, and I've since performed plenty of OCD auditioning.  
 
The difference can be subtle, but with certain recordings boy can it make a difference. With speakers the change is more apparent, I suspect due to the soundstage shifts that inversion can bring. But even with headphones the change to the sounds – specifically certain attacks – is sometimes shocking on some recordings. By inverting polarity a hi-hat can sound like a completely different instrument!
 
Count me corrected and educated and happy. Thank you, Yggy. Thank you, absolute polarity button. Thank you, Schiit.
 
 
2) Warm-Up vs. Burn-In
 
Mr. Moffat, I humbly request your opinion on this subject. First, my own bias: to me, burn-in represents a potential example of 'snake oil' prescription/ritual/behavior within the audio industry and community. There seems no better way to get someone 'used to' the sound of their brand new high-end purchase than telling them they need to listen to it for days on end before their own opinion can be trusted. I mean, what are we really burning-in: the equipment itself or the grey matter between our ears?
 
Moreover, Schiit presents itself as a company more than happy to skewer industry superstitions and dispel audio's sacred cows. As I'm sure you know, this attitude endears you to many a geeky audiophile, myself included.
 
So with that, I ask you to weigh-in on the matter of warm-up, burn-in, the distinction between the two, and how they – in your expert opinion – impact the Yggdrasil.
 
Do you recommend playing audio continuously upon first power-up of the Yggy? If so, for how long? If not, over what duration of powered-on state have you noticed the greatest shift in the Yggy's sound? Measured by your ears or by instruments?
 
For my own part I freely admit that I noticed a significant difference – and major improvement – in the Yggy's sound after two days of continuous power. Not signal, not operation, just power. Although, to be clear, the Yggy was locked-on to the USB input with its sample rate lights illuminated.
 
Thank you, in advance, for your answers!
 
D

lojay said:

I am no electrical engineer but for the sake of probing into the question, my hypothesis is that, the issue with R2R it seems is that resistance varies with temperature and thus accuracy of the getting the signal done right in multi bit DACs. S-D designs get around that problem with real life performance of resistors but introduce other problems of their own. The engineering issue is therefore not to get the DAC sufficiently hot (eg the suggestion that you could just heat the thing with a heater) but to achieve thermal stability, ie to get the Yggy at the same temperature constantly, which may require a longer power on period. So while the Yggy doesn't sound bad at all shortly after startup, to achieve its best sound it may require days to stabilise the temperature of the components.

The question I have is therefore is whether one needs days of warm up to achieve thermal stability?

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6 7/8 days, to be exact. 

jacal01 said:

lojay said:

I am no electrical engineer but for the sake of probing into the question, my hypothesis is that, the issue with R2R it seems is that resistance varies with temperature and thus accuracy of the getting the signal done right in multi bit DACs. S-D designs get around that problem with real life performance of resistors but introduce other problems of their own. The engineering issue is therefore not to get the DAC sufficiently hot (eg the suggestion that you could just heat the thing with a heater) but to achieve thermal stability, ie to get the Yggy at the same temperature constantly, which may require a longer power on period. So while the Yggy doesn't sound bad at all shortly after startup, to achieve its best sound it may require days to stabilise the temperature of the components.


The question I have is therefore is whether one needs days of warm up to achieve thermal stability?

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6 7/8 days, to be exact. 

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Mine was only 5 1/2 days...

dglow
Could you please provide some sample songs that are suited for testing that phase inversion button? My Dac also has one but I never heard anything..not that I tried much.

And +1 for your burnin question .. also think it's more of an ears burnin phenomenon and would surely like to see some expert opinions.

bearfnf said:

Mine was only 5 1/2 days...

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Then you still have yet another level to go!  Mind boggling, right?  (6 7/8 days = ___ hours = reference std.)