Depending on what type of


Depending on what type of audio you are trying to isolate (speaking, music etc.) you can use any program with an equalizer to silence the low frequency end which should get rid of the rumble. This should be fairly easy if it is dialog you are trying to keep. In the future, the solution would be to use a lav mic or something else you can get closer to the speaker (or audio source). The shotgun mic will pick up distant sounds like the ocean when you are not close to the subject.

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