[78-L] Hum removal using Audacity

[Doug Duncan]

I read the recent discussion of the removal of hum noise using Nero or 
Goldwave.

One of the comments that Rodger made was that he also had Audacity 
loaded on the machine he was using but there didn't seem to be anything 
there to help with hum reduction. So today, when I was using Audacity 
for the first time in ages, I also looked for that. I'm assuming that 
the additional plug-ins have been downloaded. You can select the notch 
filter effect and enter the centre frequency of 50 or 60 Hz and a Q and 
then apply it and listen. If it is enough then great and if it isn't 
enough then undo to get back to the input state and change parameters 
and go again until you get to the best solution.

I've always felt that Audacity was very good. At the moment I'm using it 
to hand carve the cyclic swish noise off a recording waveform and the 
result is very good albeit labour intensive.

Doug

-- 
Doug Duncan


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