cheap usb-audio-interface

[Ralf Mardorf]

On Sat, 2011-01-08 at 02:56 +0100, Ralf Mardorf wrote:
> On Fri, 2011-01-07 at 22:30 +0100, Roy Damen wrote:
> > Hello Martin, i bought a behringer u-202(not at home,i think this is the
> > type ) usb audio device for Christmas for myself. Behringer has good
> > inside quality with saving on the housing, which means cheap. It has a
> > max of 48kHz, but worked out of the box with pulseaudio, digital
> > output, jack and alsa in a better way than the onboard card(alc888).
> > Even the soundquality is better than the onboard @ 48kHz. The funny
> > thing is that it costed 27 Euro's incl shipping and it is a very small
> > high quality device, Check your local dealer or the Behringer site for
> > this soundcard with line in/out spdif-out and usb, i say the
> > price/quality is pretty amazing for a small device like this,!
> 
> http://www.thomann.de/gb/behringer_ucontrol_uca_202.htm 23.90€ +
> shipping costs. I don't know if this device is a good one, but it has
> got no mic pre-amps.
> 
> On German, but reading isn't needed:
> Balanced non-discrete mic pre-amp without phantom power:
> 
> http://www.theimann.com/Analog/Misc_Tech/Sym_Elrad/index.html
> 
> >From the German Wiki (but you don't need to read the German text here
> too):
> Phantom power:
> 
> http://www.elektronik-kompendium.de/public/schaerer/dcdc48v.htm
> 
> and how to add it to the pre-amp(information by Shoeps!):
> 
> http://www.schoeps.de/D-2004/PDFs/Mikrofonbuch_Kap13.pdf
> 
> 
> But I guess I was mistaken. It's possible to get studio quality (btw. I
> worked for Brauner microphones, today no studio audio anymore, I'm
> working for Terres Des Hommes), but perhaps it's more expensive to build
> such a pre-amp yourself, than it is to buy one.
> 
> Cheers!
> 
> Ralf

PS: A note regarding to IC op-amps IIRC the TL series are outdated, less
good, but e.g. 4580, you might compare datasheets.
I didn't check the circuits by the links I posted!!!