[linux-audio-user] what is DC? [was Re: Analyzing ogg files]

[Steve Harris]

On Wed, Dec 03, 2003 at 12:10:15PM -0500, Eric Dantan Rzewnicki wrote:
> What is DC offset in this context? I've seen this term on this list
> before, but don't really understand what it means.
> 
> Is this the same thing refered to by the ecasound options -ezf and -ezx?
> 
> -ezf
>     Finds the optimal value for DC-adjusting. You can use the result as
>     a parameter to -ezx effect.

You have to beware of this, as it will only correctly fix a constant DC
offset (I know thats a tautology, but bear with me ;), you can fix
non-constant (which is more common), by using a very low cutoff, low order
highpass filter, as in the LADSPA dc_remove plugin.

- Steve