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update, the center contact on the switch is ground. technically one could lift both pin 22s, then connect to them together and run a single 30awg wire over to the bottom contact on the input select switch. this would give you the correct filter for 44.1 usb and 96k for opt/coax.
i may have some ceramic pad isolators around here somewhere to properly isolate and locate pin 22 safely.
just general note... this thing is pretty well put together for it's price range. I am J-Standard Class III Cert. and it is definitely above Class I work, it is Class II+ looking at first glance (no scope and no extra lighting used at the moment). It has good part placement, little light on the solder in some places, some left over flux in some spots, and 1 solder splat was found stuck to a capacitor.
Now here's my comment. I want to see this run on a device that has the BW to actually RMAA this thing. Good efforts so far to show the filter options work, but we don't want people taking those graphs to heart.
The NFB12 comes with a number of power regulator for the different section, if you want to tap the ground/Vcc it would be advisable to choose the Digital ground used with the 8741, I choose a very close capacitor which is connected to both pin 7 and 8 of the 8741.
I am not even J-standard (any class) certified
If you would sponsor me a device with a BW to RMAA this I would gladly do so again
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The high frequency roll off define sound flavor, it bring a smooth flavor.
But the roll off not mean its sound unneutral, the neutral is depend on the circuits components less coloration, like some tube gears even without roll off at 20KHz but sound tube like (coloration).
You given us a bonus actually, or rather two bonus
There are 3 sound signature for the NFB12
Is anyone complain about receiving 2 extra
The 3 sound signature could be set by using different input data rate.
Maybe using 44 is the "smooth musical" sound flavor
using 96 is in between "musical and neutral "
and 192 is "neutral "
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@supercurio: which output method are you using with foobar? If it is DS you can't be sure that the sampling rate reaching the NFB-12 is what you set in foobar player. Say you have 44.1KHz from foobar goes to Xonar set at 44.1KHz but inside Windows Playback Devices Control panel you set your Xonar output to something different then Windows will resample the output. Unless you're using WASAPI you have to set sampling rate at 3 places (foobar, Xonar, Windows playback devices control panel) to be the same.
As long as the output is 192 it is fine.
Maybe supercurio could use his Xonar (since my X-fi is substandard) to record a part of a song in a set up like
PC (playback) -->NGB12-->Xonar-->PC (to record)
You can then record the 3 different sound flavor and share so that other could hear the difference.