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Old 17th January 2014, 01:24 AM   #781
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Not that I'm aware of, no. You could start one in the 'Digital Line' section.
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Old 17th January 2014, 04:07 AM   #782
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Quote:
Originally Posted by Ken Newton View Post
Tom, thanks, but no. Joe deserves all the credit for publishing this observation. I suggest naming it the 'Rasmussen Effect'.
Hi Ken

I feel honored by that, thanks. I don't like to sound like I have a big head, but I think a separate thread should be started by somebody, not just an Oppo topic, but can you imagine what it would look like if I started a thread on the "The 'Rasmussen Effect' on Delta-Sigma DACs" and it will always show me as the initiator of that thread? Don't mind the name, but I still need to be comfortable about it.

The good thing about the name Rasmussen, it is a very common name in Scandinavia, especially Denmark (in the top ten most common list) and Norway. So it will sound suitably 'generic' if the first name is not mentioned.

There is a 'Rasmussen Report' in the US, I believe they are a polling organisation.

Has anybody ever Googled their name? Let's be honest now. Well, have you any idea how many 'Joe Rasmussen's there are in the US alone? Lots.

So, if nobody objects, and if they feel it is deserved, then Rasmussen Effect, I can live with. Now just wonder what Pandora's Box has been opened?

Cheers, Joe

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Old 17th January 2014, 04:14 AM   #783
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I am testing my NOS DAC for the Rasmussen Effect this weekend, will report ASAP. Pity I don't have a DAC with a filter to test it against! What, precisely, might I be expecting to hear with a NOS dac and the capacitors installed? [I will use my wife as the blind test candidate].
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Old 17th January 2014, 04:21 AM   #784
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Quote:
Originally Posted by abraxalito View Post
Not that I'm aware of, no. You could start one in the 'Digital Line' section.
It would be very interesting because of the different approach in its DAC implementation.
And according to some (owners and reviewers) the best DAC ever to walk the surface of this planet.

Ok, I'll do that, even if I don't have any first hand personal listening experience with it. There is enough info here and there (with measurement graphs and links) to keep it interesting for many members here at diyAudio.

Thx for the suggestion.

* EDIT: Done! ...In the Digital Line Level section of the forums.
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Last edited by NorthStar; 17th January 2014 at 04:35 AM. Reason: * EDIT
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Old 17th January 2014, 04:43 AM   #785
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Quote:
Originally Posted by lordearl View Post
I am testing my NOS DAC for the Rasmussen Effect this weekend, will report ASAP... What, precisely, might I be expecting to hear with a NOS dac and the capacitors installed?
So far we have only really confirmed that the 'effect' works with delta-sigma DACs and that is a very obvious effect when heard.

But with NOS DACs, it may simply perceived as HF roll-off, if the cap value becomes too high and no sweet spot is heard before the roll-off becomes very obvious. No sweet spot, then nothing gained.

Cheers, Joe
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Old 17th January 2014, 04:59 AM   #786
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I'm not a delta-sigma DAC type of guy myself. ...I prefer ladder DACs.
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Old 17th January 2014, 05:38 AM   #787
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Quote:
Originally Posted by NorthStar View Post
I'm not a delta-sigma DAC type of guy myself. ...I prefer ladder DACs.
And maybe we are closer to understanding why.

I have both types of DACs myself.

Cheers, Joe
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Old 17th January 2014, 09:22 AM   #788
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As thought, as done it...

http://www.diyaudio.com/forums/digit...ml#post3781505

Joe, you are invited to write first there more about, and then let`s see what happen...
I think it will be interesting...

Last edited by Coris; 17th January 2014 at 09:31 AM.
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Old 17th January 2014, 08:35 PM   #789
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Quote:
Originally Posted by Joe Rasmussen View Post
And maybe we are closer to understanding why.

I have both types of DACs myself.

Cheers, Joe
One word: Analog.

* A DAC like for example, the Burrr-Brown PCM-1704K (or PCM-63) sounds more 'analog' (smoother, more pleasant, less irritating, fuller, faithful, natural, ...) than another one from say Cirrus Logic (Crystal DAC - CSanything) or AKM DAC.

Yes, you can alter the sound of a delta-sigma DAC to make it more euphonic, from various implementations, and more similar to a turntable somehow; but a digital EQued turntable sound.

Just my own view anyway.
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Old 17th January 2014, 08:40 PM   #790
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Quote:
Originally Posted by Coris View Post
As thought, as done it...

http://www.diyaudio.com/forums/digit...ml#post3781505

Joe, you are invited to write first there more about, and then let`s see what happen...
I think it will be interesting...
That's cool.
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