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Gear / Technical Help => Post-Processing, Computer / Streaming / Internet Devices & Related Activity => Topic started by: cavekelly on September 20, 2011, 03:03:20 PM
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I have been pretty much out of the game for a while and have virtually no post skills beyond tracking and fades. I am currently trying to go back to a trove of dats for basically personal use. I have discovered two dats, made the same evening at different jazz clubs in Manhattan, with the same anomaly. It is a constant frequency buzz (at a fairly high frequency). I vaguely rememeber I determined at that time it was the result of leaving the light on my D-8. Never did that again!
So how do I remove the buzz and with what tool? Thanks in advance for the input.
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The cheapest way would be with Audacity.
The easiest way; First, figure out what the frequency is and then see this thread (http://taperssection.com/index.php?topic=148725.0) about removing select frequencies and note the photo of the third reply with the spike.
A more complicated way; Noise reduction. If you could find a portion of the tape which is just the buzz, then you could probably make a good stab at use a noise remover, but if you are looking at fixing an audience tape I'd either select a different tool than Audacity or tinker with the EQ to try and isolate that buzz frequency band before I took a sample for the noise reducer to learn (and then apply the reducer on the main original 2 tracks).
If the noise is neatly contained in a consistant band and you can get a very tight focus on that band (e.g. it's less than say 10hz across) then the EQ notch filter idea is a real posibility, otherwise I'd look toward a noise reducer (and spending a lot of time learning how to use it effectively; it's a grenade, you can do a lot of damage easily).