I do video in weddings, I have a Canon XHA1 with a Rode mike. When a record in the wedding reception if they have live music, and if there are a lot of drums, like the Mexican music or live DJ with a lot of base, the sound come out very distorted in the low frequencies. My question is, what can I do to remove the low frequencies to get a decent sound in the video?. Do you recomend the Wind Muff Microphone?
You probably have an overload problem with the original recording. My first suspect would be microphone pre-amp overload, which could be addressed by either padding down the mic, or possibly by using a high pass filter, as your problem seems to be caused by strong bass sounds. I doubt that the microphone itself is overloading--Rode makes good quality microphones that should not overload in your application, unless you stick the mic inside a kick drum, etc. (unlikely for general video pickup).
There is also the question of how you are setting and monitoring your sound levels. If you are relying on AGC built into your camera, it may not be adequate to the task of dealing with really loud levels. If you are setting sound levels manually, you have to check the metering in your camera to see what happens when loud, bass heavy music starts playing--it could just be a matter of your levels being set too high for that situation.