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Posts by firev1

The results of course are repeatable with not just the ODAC but other usb DACs I have on hand like the measurement interface and the UD110mk2. Its just that the O2 has the most gain in supply isolation. Also the point of this exercise was to show that isolation can help out those whose chain may be susceptible to these faults but are unable to change out whole components to get a cleaner supply. The Lifebook without the VGA connected monitor is pretty clean and gets me the...
For me subjectively, its always a blacker background ,less "thickness" from distortion in the sound and more importantly, I get less listening fatigue. For example comparing this the UD110mk2, the ODAC to me sounded more similar then different from the UD110mk2 before placing in the isolator. Also it does not help that I have more experience with the ODAC losing lock easily over time or from changing sampling rates. All my relevant data cables tend to have ferrite beads...
I'm at least half sure that a battery may be overkill but hey :P have fun! I would love to do battery power electronics as well. Here is ground pollution from my VGA monitor, not sure about how newer monitors would work. Rig this time is Monitor >Fujitsu Lifebook-> ODAC->ADC-> Adum4160 isolator-> Lifebook. Taking out the monitor gives me a clean spectrum.   Maybe the rigs you have been using are cleaner then most but I find that its not the case with some of us which may...
This http://www.head-fi.org/t/703334/doodlebug-usb-isolator Yes I have tried without AC power and and rigs I'm using have sufficiently clean usb power which measures roughly the same(or a little worse at most) as the below graph. (take note that the graphs are not indicative of the ODAC's true performance as it exceeds the ADC). The signal to noise on rough calculation is approximately -87dbFS  which would be pretty audible. Edit: Tested with my Fujitsu laptop(AC in...
I remembered seeing stuff like "digital signals don't distort" yada yada. Fact: ODAC is not completely immune to noisy power supplies. I can get hold of more rigs to demonstrate it but I believe the fact that ODAC has poorish PSRR to be pretty conclusive regardless of setup. Something like the Doodlebug would be a great product with the ODAC. What happened on the blog was the lack of detailing in the test chain he used for the ODAC, if you are on battery all the time, its...
Joining in to register my interest, would love to see a kit in the near future :D
Looks like nothing could be done on the highs but the thickness does indeed cause the 'closed in' feeling in the sound. Just tried the IM70 profile with Golden Ear's Accudio app with -2db on the vocals, sounds much nicer but I think it reveal a little of the resonances up top as well, will have to listen more.
Yeah after a while that you mention that, I agree. I would put it down to the strong lows reproduction of the IM70. It sounds closed due to the lack of highs or air but feels like the lows feel very large(like large drums in a hall). I should also mention that higher mids->lower treble are not its strong suit as well so female vocals may sound very slightly strained/nasal of sorts.
You have to plug it into an amp, without music playing, the UD110mk2 is not that great in noise.
Plays 32 bit just fine, in win 7 64 bit. The driver does not report the bitrates correctly to windows panel but it works with WASAPI at least. Works on foobar as well. The device won't work in 24 bit mode. You have to set your player to present data in the 32 bit package. In directsound, you are limited to 16 bit.
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