My wife did a tape recording interview with her grandfather before he passed back in 2006. She used a cassette tape recorder. He served in WWII in the Guam and Guadalcanal campaigns, but rarely talked about it. Well, in this interview with him, he opened up for about an hour and a half, talking about things that nobody had heard before. Anyway, there was a fan running during the interview, and some parts are hard to hear. Is there some place we can take the tapes for them to remix it and lower the fan noise? Any ideas? Thanks!