To separate the stereo tracks in Goldwave you can select the whole file, use Edit/Channel/Left or Edit/Channel/Right to select the channel you want and use File/Save Selection As to save the selected channel to file (You can alter the save format at this time too if you wish). (For some reason Save As saves in stereo by default).

Noise reduction is fraught with hazard, the ususal advice is to select the noise profile for removal by taking it from a silent part of the recording (no music playing) and use that.

(You could also try Steinberg's Clean as a fairly cheap (around £40 in UK IIRC) way to clean and restore the old vinyl (or anything else) with mininmum intervention.)


Mick

Mick