Poor sound in Movie maker output

Hi all

I am currently copying some old VHS analogue tapes to my PC for editing. I have copied the film OK along with the sound using "One touch grabber" This edits OK in Movie maker and plays fine but the resultant save to the PC (.wmv) format when played back in Media player has very quiet, fuzzy sound quite unlike the raw film as edited and played in movie maker which was quite clear and crisp.

I decided therefore to pick up the sound track from the VHS tape separately using the the mike input socket in the PC and the windows sound recorder. The intention being to put this recorded file against the film in Movie maker and editing it along with the muted video.

The recorded sound in .wma format was fine when played alone and the file was imported and edited with no problems with the muted video files. Playback of this via movie maker was OK.

The final result when the combination was published to the pc as a .wmv file played through media player was just as dismal.

Does anybody know the reason for this or suggest a way of getting better output sound?

Thanks in advance

Penphill