It is noticleable, sure, I would suggest to use a linear-phase FIR
filter
instead maybe, but I´m not sure if it would do the job much better. Of
course it would be rather slower, and you would probably need some
hundreds
of coefficients... maybe you could try what happens with something like

asig atonex asigdc, 5, n
n being a large number  ... just guessing

(Notice dcblock ~ atone with a low cutoff)

Btw does anyone now an Online tool to design linear-phase FIR filters??

Tobiah wrote:

> Is it really noticeable?  If it is, would it be terribly difficult
> to design a filter that cut off say, 0-5 Hz, and had a steep enough
> roll-off to leave the 20's and 30's alone?
>
> Toby
>
> > Dcblock is
> > essentially a 1-pole recursive highpass filter which rejects DC, but
> > *also* some low frequencies to some extent, so the price you will pay
> > will be a worse performance in lower frequencies.



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