FCP (and all professional edit apps) wants sound files to be 48kHz 16 or 24bit. If it’s not you have to render. But, it’s a quick render. The sound’s sample rate was probably set in the camera. In the future have the camera set to 48k to eliminate the need to render sound. Why didn’t you use FCP to capture instead of iMovie? Not that it would have made a difference with the sound. Did you use the DV PAL easy setup?
John
MacPro 8-core 2.8GHz 8 GB RAM OS 10.5.5 QT7.5.5 Kona 3 Dual Cinema 23 ATI Radeon HD 3870
ATTO ExpressSAS R380 RAID Adapter, PDE Enclosure with 8-drive 6TB RAID 5
24″ TV-Logic Monitor
Final Cut Studio 2 (up to date)
Pro Tools HD w SYNC IO, Yamaha DM1000, Millennia Media HV-3C, Neumann U87, Schoeps Mk41 mics, Genelec Monitors, PrimaLT ISDN