Talk:High-pass filter

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I have added the High Pass Filter Image, however am not sure how to scale it, anyone feel free to do so.

I moved this sentence from the article, because I don't understand what it is trying to say, irritation of whom (the listener?), could the contributor please clarify the meaning and it can be added back. --Lexor|Talk 13:07, 24 Jun 2004 (UTC)

There is often irritation when you actively want to cut low frequencies with a high pass....

I have edited the formula for alpha in the code section. —Preceding unsigned comment added by 194.138.39.53 (talk) 09:59, 15 April 2008 (UTC)

[edit] Computer algorithm

The algorithm under "Digital simulation" appears to be reducible.

y[i] := alpha*y[i-1] + alpha*(x[i] - x[i-1])

can be performed more efficiently as

y[i] := alpha*(y[i-1] + (x[i] - x[i-1]))

It appears the redundant alpha is meant to match the equation above it, but it is confusing to someone who might think there is an error in the algorithm. Nielsed (talk) 06:51, 18 May 2008 (UTC)