[linux-audio-user] what is DC? [was Re: Analyzing ogg files]
S.W.Harris at ecs.soton.ac.uk
Wed Dec 3 12:41:40 EST 2003
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?
> 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.
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