DC offset trickery

[steve]

@steve

A. The best solution is to use better recording equipment.
If that is not an option, (for example with audio that has already been recorded), use this Nyquist DC offset tool with the options:

Remove DC offset
Abs + Filter

There is now an updated version of the DC Offset tool: DC offset tool (plug-in) - #9 by steve

The new “Dynamic bias adjustment” is likely to produce the best results whenever there is a non-constant DC bias.