I'm kinda curious about filter kernel. What is it?
Is there any comprehensive description you would advice to read about it?
Thank you in advance!
Alexandre Prokoudine | "When you set yourself on fire and aim
ALT Linux Documentation Team | for the sky, you hope to leave behind
E-mail: avp@... | some sparks of heat and light"
JabberID: avp@... | Neil Peart
Sure, as the convolution filter applies to reverb (which is just a
special case of filtering) this link explains it pretty well. The
'impulse response' in this document is the filter kernel.
Terms (in case you're not already familiar):
- frequency response of a filter: that graph you see that describes how
a filter passes or filters frequencies.
- time-domain: can be thought of as something plotted on a graph where
(usually) the horizontal axis is time. (i.e. the usual waveform view
you see in ReZound is amplitude on the vertical axis and time on the
- frequency-domain: can be thought of as something plotted on a graph
where (usually) the horizontal axis is frequency (i.e. left most is 0Hz,
on up to the right-most highest frequency in the signal being plotted
this way, and vertically measure how present, the amplitude of, that
frequency is in the signal).
As it applies to filtering such as low-pass, high-pass, etc. The filter
kernel is the time-domain of the frequency response of a filter (which
usually shown in the frequency-domain).
For reverb the filter-kernel/impluse response is as long as the
For low-pass high-pass the kernel are usually considerably shorter.. and
I guess it could sometimes be thought of as reverberation in a bucket,
or a pillow where the reverb time is very small.
On Mon, 2003-10-13 at 10:32, Alexandre Prokoudine wrote:
> I'm kinda curious about filter kernel. What is it?
> Is there any comprehensive description you would advice to read about it?
> Thank you in advance!