If your turntable has an inbuilt cable, you won't need one of these.
#VIBE SOUND USB TURNTABLE INSTRUCTIONS MANUAL#
This set of tutorials from the 1.3/2.0 manual should help you. I hope you kept the receipt for the Vibe - send it back, it's junk - and use your existing kit. I personally prefer the quality of my Edirol over my PC's onboard soundcard. This will then use the soundcard on your computer for recording. I assume your amp has RCA outputs - if your computer has a line-level input (not a Mic input, you will overload one of those with a line level signal) you could work by plugging from the amp to the line-in on your computer.
#VIBE SOUND USB TURNTABLE INSTRUCTIONS PLUS#
You can get combined phono pre-amp/USB soundcard devices - ARTcessories makes a good one the "USB Phono Plus v2" and there are others ( I particularly like the build quality of the ATRcessories kit) - the Edirol was useful to me as I also had a MiniDisc collection and the Edirol has a digital S/PDIF input so I could go stright-through digital from MDs. I have gain controls on both the pre-amp and the Edrol soundcard - this enables me to leave the Edirol set for FM capture from the BBC and I can use to pre-amp control to vary and optimize the signal level for my LP captures.
This avoids having to re-plug the soundcard all the time to change inputs - and the SkyTronic has a very low noise floor. I have the Phono preamp, my Nakamichi tape deck and my wife's old FM tuner connected to a three-way passive switch (SkyTronic) which is in turn connected to the Edirol USB soundcard.
And bought a phono pre-amp (ARTcessories DJ-PreII) and an external USB soundcard (Edirol UA-1EX now superseded by the Cakewalk UA-1G). I resurrected my old Technics SL-150/SME arm from the attic and gave it a home service. I started out with an ION iTT-USB turntable for my transcriptions - I soon junnked it because it gave far too much wow&flutter (probably down to the very lightweight plastic platter - the electronics were good though and it did at least have a volume control.