Replacing lost information is always a challenge. You might have some success with the Apple/FCP filters, but it depends on what you’re starting with. Waves has a bass plugin that uses what they call psycho-acoustic technology. The plugin allows you to select a fundamental freq and it adds in harmonics of that freq thereby creating the impression of more bass. I don’t know if you can use it directly in FCP. I’ve used it in Pro Tools and it works well in the right situation.
John
MacPro 8-core 2.8GHz 8 GB RAM OS 10.5.8 QT7.6.4 Kona 3 Dual Cinema 23 ATI Radeon HD 3870, 24″ TV-Logic Monitor, ATTO ExpressSAS R380 RAID Adapter, PDE enclosure with 8-drive 6TB RAID 5
FCS 3 (FCP 7.0.2, Motion 4.0.2, Comp 3.5.2, DVDSP 4.2.2, Color 1.5.2)
Pro Tools HD w SYNC IO & 192 Digital I/O, Yamaha DM1000, Millennia Media HV-3C, Neumann U87, Schoeps Mk41 mics, Genelec Monitors, PrimaLT ISDN