I thing this thread must be moved

Anyway...
ALL the sound cards' line input uses a 3.5mm STEREO (1/8") miniplug so you won't have to buy a new one to get stereo. The only thing you will need is the right patch cord (you can buy it or you can make yourself your own).
The configuration for this patch cord depends on your audio tape player. One tip of the cord must be always a 1/8" miniplug. The other tip could be a:
1- Stereo 1/4" plug
2- Stereo 1/8" miniplug
3- Stereo RCA
4.- Naked wire
1 & 2 are commonly used for headphone output, 3 & 4 are used for speakers output. You must be careful if you are going to connect directly the speakers output from your audio tape player to your sound card's input (because the sound card line input is designed for low power and the audio player's speaker output is high power... you must set the player's volume too low, otherwise you're going to get distorted recordings or -in the worst case- you're gonna burn out the sound card's line input). I suggest to use the headphones output as the "output line" instead of the speakers output. Always remember to adjust the player's volume to avoid saturation of the recording VU meters (to reduce distortion).
For the MP3 ripping, try to get the COOL EDIT PRO software. (there are a lot of nice software to do this, but I highly recommend the Cool Edit Pro)
If you get monoaural sound, two things can be happening:
1- You're using the sound card's MIC input instead of the LINE input or
2- you didn't set up the software recording options to get stereo.
