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Best Audio Filter for Car noise?
I’ve got two people talking in a park, with wireless mics hooked to one person, and a shotgun mic on a second camera.
I need the sound from the shotgun mic cause the wireless picks up NO ambience. But the low rumbling of the constant cars driving by is almost too annoying to use what the shotgun picked up. Is there a filter that keeps voices sounding normal but supresses the low rumbling car noises?
Thanks a bunch,
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6 Replies
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Although I’ve personally never tried it, I believe SoundSoap is a very good audio ‘cleaning’ product.
Good luck.
Wayne
2DP G5, 3.5GB RAM, FCP HD
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here is a little tip that works VERY well using the built in audio filters in FCP
https://proapptips.com/tips/article.php?story=20050307173859815
apply a Parametric EQ from the Apple Audio filters (the filter is AUParametricEQ) to the clip in the timeline then load the clip into the viewer
then push the gain to full in the settings for the effect and put the Q to 20 (makes a very narrow LOUD spike in the audio)
then play the clip and adjust the CENTRE FREQ. till you hear the noise get louder adjust the Q (the width of the FREQUENCIES you are affecting) so your just affecting the noise then drop the gain to -20 should get rid if it
this works great at removing specific frequency sound like Hums static wind and fans
you might need to apply it a couple of timesDAVE at Movies Rock in Toronto
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Oh my Gosh, that worked so well! Thank you so so much. It’s like a miracle!
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As a sound editor/ mixer, I would recommend that you check your EQ with decent speakers and sub woofer or headphones. My sub woofer often frightens me with the amount of low frequency crud that is on location sync and probably in your recording. You are only getting rid of rumble that you can hear on your speakers whilst leaving a ton of rumble below the audible range of your speakers.
I alway start with a high pass filter to take out signals below 70hz. Then do the notch filter on the rumble you can hear which is commonly around 190hz in a car. It will also suddenly make the dialog sound brighter as the low frequency sound is actually modulating harmonics right up into voice frequencies. If you are going to sound post, make sure you OMFI the un EQ’ed track and let the experts EQ with better tools and speakers.
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I should also add that devices like the CEDAR DNS1000 will actively noise reduce car ambience even better. Combined with EQ, large amounts of rumble can be removed, without making the voices sound thin and reedy, which be the result ofexcessive EQ.
CEDAR is available as a stand alone or plug in for audio posts systems like SADIE and Protools. It isn’t cheap, just the best.
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Another approach would be to add ambiance (sound effects) behind the clean dialogue from your wireless mics
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