aleluist: After reading all of this, some ideas I had about the matter:
- Windows 7 has two different settings for default devices: normal and "communications" (i. e. Skype). Check what you are using as "communications" device (since it's working with Skype), and use that for both. To check this you have to right click on any of the options ("Mikrofoni", for example) and check if you can select that as default. If you can't, it is already selected. Seeing your screenshot I think it was setted properly, but it won't hurt to check.
- At the same time, if you want to use the connector at the front of the case, you have to select "Front Mic" as default device. Otherwise, it won't work. And while you are at it, it could be a good idea to try selecting the "Front Mic" as "standard" default device but keep "Mikrofoni" as default device for communications and try recording from the front input.
- In fact, if you want to record the whole "stereo mix" set that as default device for recording. Worth a try. As long as the mic is sending signal, it should be recorded. Might not work, though.
- It may very well have nothing to be with this but, since Vista, Windows automatically change sample rates whenever you launch a program. Try if you can make things work using 44.1khz, 16 bits. With badly written drivers, that could help.
- In the "sound" window, go to the last tab (my guess is that it says "communications") and select the "don't do anything" option. If you do not find that option (I'm using a spanish version of Windows, so the wording can be different), it should be the bottom one. Please do tell what setting was selected!
- Another thing: can you try what happens when using the "sound recorder" that comes with Windows?
One important thing: based in what you wrote the mic is not the problem. It could be the OS, the software you are using, the drivers... but not the mic. It seems like a gain setting problem, though...
The default communications is the mic. It works with skype.
Last time I put stereo mix as the default and recorded with skype on (it lets me change to stereo mix after the call has started, but refuses to accept calls if stereo mix is the default prior), it recorded my friends voice and the sounds from the game. It didn't record my mic...
It's selected, the don't do anything -button.
Sound recorded records my voice with the same low volume as playclaw and audacity does.
Mic is probably okay, as it works wonderfully with Skype..
The codec this VIA HD Audio deck uses is VT1708S. If I update the drivers, it gets wonky.