kAudioUnitID_BandPassFilter
kAudioUnitID_BandPassFilter
- Subject: kAudioUnitID_BandPassFilter
- From: Lieven Dekeyser <email@hidden>
- Date: Fri, 11 Jan 2002 20:12:23 +0100 (CET)
Hi!
Maybe this is a stupid question but I really don't know much about
audio processing :-)
What frequencies does a BandPassFilter AudioUnit with center frequency
5000 and bandwidth 600 filter?
Does it cut out exactly all frequencies below 4400hz and above 5600hz and
leave those between 4400 and 5600 untouched like
this: (sorry about the ascii art ;) )
_____
| |
_____| |_____
^
5000hz
or is it more like this:
_____
/ \
___/ \___
^
5000hz
?
the reason I'd like to know is I would like to implement something like
the equalizer in iTunes, so I'd take some Band Pass filters each for a
different frequency interval, pass the audio data through them, and then
mixing the output back together adjusting the gain. Is this the right way
to do it, or are you all laughing at me right now? :-)
--Lieven