[linux-audio-user] RE: I just want to EQ the quiet parts

[Bob]

Jan Depner wrote:
> 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 at oneupaudio.com>
>>>Subject: [linux-audio-user] I just want to EQ the quiet parts
>>>To: linux-audio-user at music.columbia.edu
>>>Message-ID: <1125082030.31648.30.camel at localhost.localdomain>
>>>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.
>>

Now that seems a simple and nice approach.
Thanks as I had the same problem.

Cheers
Bob









> 
>     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 ;-)
> 
>