mikeotrfan Posted March 19, 2014 Share Posted March 19, 2014 I downloaded an old radio show. There is a hum that is causing the sound to be muffled. I can take a snapshot of a section where there is just the hum. How can I use, if at all possible, that snapshot to cause the hum to disappear. I've click on numerous different options, all to no avail. I'd really appreciate help! Thanks in advance! Link to comment Share on other sites More sharing options...
Guest Alex Chapman Posted March 19, 2014 Share Posted March 19, 2014 Hi Mike, Check out the Cleanup section on the Effects tab, and the Noise Reduction tools in particular. I just tried this out by mixing some brown noise (made with ToneGen) with spoken audio. I was then able to recover a good approximation of my original audio with the following process: 1. Apply Auto Spectral Subtraction. The brown noise was less audible. 2. Apply Auto Spectra Subtraction again. The brown noise is now only audible in the gaps between words, and quite soft. 2. Apply a Noise Gate with settings: Threshold -18dB, Hold 20ms, Attack 0ms, Release 0ms, Attenuate -10dB. Here the threshold is the most important setting, because it determines what gets cut out. I made the attenuation fairly small so that the words didn't sound clipped. You asked specifically about using a snapshot to reduce the noise. To do this, select your snapshot, and use 'Grab noise sample from selected area for spectral subtraction'. Next unselect your snapshot (so that the following will apply to the whole file), and use 'Spectral subtraction based on noise sample'. You may need to do this a few times to get a better result. I tried this, but for me the Auto Spectral Subtraction worked better. Alex Link to comment Share on other sites More sharing options...
audioenhancer Posted March 19, 2014 Share Posted March 19, 2014 Mike Could you send a segment of your audio and also some blank noise from the track I would like to expirement with what your working maybe I could try a few methods to help if possible audioenhancer likes old time radio too Link to comment Share on other sites More sharing options...
audioenhancer Posted March 19, 2014 Share Posted March 19, 2014 Alex, what a cool helpful reply for Mike ! Link to comment Share on other sites More sharing options...
mikeotrfan Posted March 19, 2014 Author Share Posted March 19, 2014 Good morning, Thanks for the help Alex. I want to attach two clips but cannot figure out how. They'd be from a show called Parsley Sidings. One clip is including what you suggested Alex, and the other is the same clip without any cleaning. Audioenhancer - any help you could give would also be most welcome. I've tried the method of grabing the section of noise and doing the spectral subtraction, but that only reduced the whole show to barely audible. It's indeed possible that there's nothing that can be done for this, but I'm hoping that by learning how to work on this show will help me with some American OTR shows. How can I upload these clips? Thanks! Mike Link to comment Share on other sites More sharing options...
mikeotrfan Posted March 20, 2014 Author Share Posted March 20, 2014 OK guys, Here are two clips. The first one is with Alex's suggestions and the second one is the "native". There is a portion of the noise at the end of each clip. http://sharesend.com/qfo4arca http://sharesend.com/lxd6zgm1 Thanks in advance! I really want to learn, so if anyone figures this out, please let me know! Link to comment Share on other sites More sharing options...
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