Re: [linux-audio-user] Removing AC hum after the fact.

"Alex Polite" &lt;notmyprivateemail(a)gmail.com&gt; writes: Jamin's actually quite good for doing this, since it's got a nice spectrum display and interactive EQ settings. Failing that, you could use a LADSPA filter (like "Single band parametric") and a spectrum analyser (like Jaaa) and just tweak the filter settings until the peak you see on the analyser disappears. [player] -> [JACK Rack with SBP] -----+----> [recorder] | v [Jaaa] If it's really mains hum, then you can probably just cut the frequencies below 130Hz or so. -- Adam Sampson &lt;ats(a)offog.org&gt; <http://offog.org/>