On 20/07/2014, Paul Stamler wrote:
> On 7/19/2014 7:58 PM, CJB wrote:
>> Please can someone advise me. I'm using Audacity to digitise a bunch
>> of home-taped cassettes. Unfortunately some of them have a pronounced
>> hum underlying the music. Is there a way of damping this down.
>> Audacity has a bunch of filters written in Nyquist, but I'm not sure
>> what settings to use, BTW the hum is likely to be at UK mains
>> frequency of 50 hertz. Thanks - Chris B.
> Does Audacity include a spectrum analyzer? It could tell you whether
> the hum is 50Hz or 100Hz.
Probably both components will be present, and perhaps other harmonics of
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