On Fri, 2005-08-26 at 17:51, philicorda wrote:
> > Message: 3
> > Date: Fri, 26 Aug 2005 11:47:10 -0700
> > From: Mike Jewell <mj405@xxxxxxxxxxxxxx>
> > Subject: [linux-audio-user] I just want to EQ the quiet parts
> > To: linux-audio-user@xxxxxxxxxxxxxxxxxx
> > Message-ID: <1125082030.31648.30.camel@xxxxxxxxxxxxxxxxxxxxx>
> > Content-Type: text/plain
> >
> > Hi LAUs,
> >
> > I'm pretty new to all this but have been using Audacity with plugins,
> > etc and have recently been experimenting with Ardour and Jamin.
> >
> > What I want to do is EQ the "quiet" parts only of a wav file. The file
> > is a tape recording of some source (probably LP) done on a cheap
> > recorder. There is lots of rumble that is mostly noticeable (of course)
> > in the quieter spots on the track. Playing with Jamin's 30 band EQ
> > shows that filtering out a band or two around 200 Hz helps a LOT but
> > this wrecks the bass in the louder "musical" sections.
>
> What I would do is...
> Render a couple of versions through Jamin. One with the severe 200hz cut
> for the quieter sections, and one with settings that work well on the
> louder bits.
> Then, line them up in Ardour so they start at exactly the same time and
> cut/crossfade between them so the bass cut version is only used where
> it's needed.
> Longish crossfades should make the changeovers inaudible.
>
It would be much easier to use the scenes in JAMin. You can change
the scene crossfade time as well.
> >
> > Is there something like a noise gate that, instead of silencing
> > everything below a certain threshold, would apply a given EQ to it
> > instead? With all the cool Linux Audio tools out there, it seems like
> > there must be some way to do this. (Maybe Jamin can and I just don't
> > see it.)
>
> I guess you could use the spectral gate in freqtweak to do this. It does
> tend to change the sound a little (It's not really meant for this kind
> of thing) though considering the quality of the source it could well be
> acceptable.
>
> Just stay away from the delay, feedback and warp settings or you'll be
> playing with it all night... :)
>
> If Jamin had inverse ratios for the compressor sections then you could
> do some expansion. Perhaps if you ask the authors they will look into
> it?
>
This would be a job for Steve but I think it's a good idea ;-)
--
Jan "Evil Twin" Depner
The Fuzzy Dice
http://www.thefuzzydice.com
"As we enjoy great advantages from the invention of others, we should be
glad of an opportunity to serve others by any invention of ours, and this
we should do freely and generously."
Benjamin Franklin, on declining patents offered by the governor of
Pennsylvania for his "Pennsylvania Fireplace", c. 1744
