"I love my Ion USB turntable, but I only get one track of audio. What am I doing wrong that it only records one channel? It has never worked properly so I have converted many LPs with only one track of stereo working. I have Windows Vista. Please help!"
Windows Vista detects USB audio devices differently than Windows XP, which means Vista improperly detects the Ion USB Turntable as a mono device instead of stereo. To fix the problem, you need to make an adjustment in the Windows Vista Control Panel.
To correctly configure your computer for recording in stereo, you need to open the Sound option from Start > Control Panel > Hardware and Sound. Click the Manage audio devices link, then click the Recording tab, select the Microphone USB Audio CODEC from the list of recording options and click properties.
From the Advanced tab select 2 channel, 16 bit, 44100 Hz (CD Quality). After clicking OK on all open screens, you're ready to record in stereo.
http://www.jakeludington.com/ask_jake/20081102_how_to_fix_ion_turntable_problems_recording_with_windows_vista.html