audio selection

Is there any way I can select a certain band of frequencies throughout a track (say 0-100hz) to use an effect on? I am using Ubuntu 13.10, Audacity 2.0.6-alpha-Feb 24 2014, and I am getting the deb through the nightly PPA instead of Ubuntu.

Effect > Low Pass Filter: 100
Maybe a little higher because the filters can be a little sloppy. Pick a high rolloff.
You may be disappointed. There’s not a lot going on down there. We routinely chop off everything below 100 Hz on vocal shoots.

You may find yourself doing effects with air conditioning rumble.


i see what you are getting at there, but i am not trying to remove the lower bands… i am trying to select them to apply an effect just to them, but not the rest of the track… maybe i use a filter to just split the lower frequencies into another track, apply the effect, and just merge those two tracks back together?

I don’t know any way to do that in one step. That’s a cousin to the people who want to select the Metrobus sound that’s interfering with their recording and delete that.

You could try duplicating the track (Edit > Duplicate); and then Effect > Low Pass Filter on one and Effect > High Pass Filter on the other. They’ll be married to each other when you Export the show. I don’t think that’s going to work because I don’t think the two filters are reverses of each other, but it’s as close as I can come.


There is a slightly more exotic way to do it.
Duplicate the main track. Apply the Low Pass Filter to the second track. Duplicate that track. Invert the first of the filtered tracks.

That will give you a perfect track, a flipped effects track which will accurately cancel everything below 100Hz on the perfect track, and a straight effects track that you can mess with. All the tracks, unless you do something crazy, should accurately add and cancel when you export the final show since there was ever only one filter in the whole exercise.


that worked perfectly… thank you for the help!