I am recording insect noise - buzzing, rustling in flowers, munching, etc. with a lav mic on a long skinny stick. My new goal is to remove ambient sound like planes, distant cars, etc.
Poor results (tons of ambient) so far with omnidirectional Audio Technica AT803B, which I had lying around. So switching to cardioid, something like a DPA 4080.
I'd like to record the insect with 1 mic and then ambient with a 2nd mic. Can I then use software like Audacity to subtract the sound in the 2nd mic from the 1st (since 1st won't have any insect sound), giving clean insect sound?
I saw a similar post, though it did not suggest this approach Noise reduction using multiple recordings of the same signal