Thanks a lot Bogdan and Sirjamsalot!
My pricerange depends on what I need, if it's too expensive I'll save some more.
I doesn't have to be a webcam, but I tought maybe it would be better (for Mtp's or so). No?
How does it works with a jack? Is it guitar-amp-recorder?
If so I would prefer a sort of jack, for the reasons you mentioned Sir.
Web-cams are geared for recording directly into your computer for things like live-conferences and chatting. Software like Skype have built in drivers/software that can communicate directly with web-cams for real-time video feeds. They generally reduce the framerate and compress as much as possible in order to be web-capable - transmit decent quality so that it doesn't completely wipe out your internet connection's band-width. This is the option to go if
1. Your instructors don't mind web-cam quality
AND you want your camera to serve the added purpose of online video chatting (mtp?).
2. Your price-range is sub 150 dollars - you can get decent webcams really cheap.
Some of the more recent MiniDV camcorders
might come with drivers to allow your miniCam to work with Skype like a normal web-cam, but you'd have to check. I did some basic searches and it doesn't look like there is much info on it, at least that I could find in 5 minutes of perusing. Perhaps someone here knows.
MiniDV is the best option in terms of overall quality, but expect to pay a base price of $200+.
Per your audio question: your miniDv will have an 1/8th inch jack that you can plug into. your audio interface should have a mic-in, and a line-out which you can use adapters to get the sound plugged in. I don't know your setup, but the basic gist is this:
mic->soundboard->(1/4" to 1/8" adapter) -> camcorder's 1/8" line/mic in.
or
guitar->audio interface->headphone out-> (adapter?)->camcorder's 1/8" line in.
or some combination like that.
My thoughts.
Christian A.