What kind of cable? You need a stereo one but depends on what the input socket on your computer is (probably a mini jack) and the output from your tape player is - can you take the player to a shop which sells cables? e.g. Maplin - I'm sure they would give you free advice and they sell almost every type of cable available. And don't record the tapes in MP3 format for burning onto CD unless you have an MP3 CD player or understand what you're doing - it won't work.