On Mon, 29 May 2006 09:08:58 +0100
Gordon JC Pearce <wsynth(a)gjcp.net> wrote:
On Mon, 2006-05-29 at 10:05 +0200, Alex Polite wrote:
Hi there.
I have an interview with a lot of AC hum. I'd like to remove as much
of the hum as possible. This is not for broadcasting. I just want to
be able to hear what the persons on the recording are saying.
I've looked at the sound in a frequency spectrum analyzer[1]. The hum
looks just as consistent as it sounds so I guess there must be a way
to filter it out. I just don't know which linux tool will do it for
me.
Very sharp notch filter?
Gordon.
If it's just for speech then you don't need a notch filter at all, just
kill everything below 300Hz. A simple graphic equaliser should be able
to do a reasonable job of this. Giving a small boost at around 4kHz can
also help improve clarity.
--
F