Re: [LAU] [Sort of OT] Ringing in filters

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To: Ken Restivo <ken@...>
Cc: <linux-audio-user@...>
Date: Monday, May 17, 2010 - 9:14 am

On Thu, May 13, 2010 at 12:58:15AM -0700, Ken Restivo wrote:

> This is interesting. Never thought of building a DIY

Hi Ken,

The network here is based on the one used in Jamin.

> I'm not sure how to match up the settings you have here

+-- low --+
mix ----> eq ---+-- mid --+-- boost ---> output
+-- high -+

The low/mid/high branches each get a spatializer
and compressor.

The limiter goes on the boost track. Could be a
brick-wall limiter, however the scaling limiter
is OOTB defaut.

> And why is the parametric

Same as any equalizer: for boosting/cutting various
frequency ranges, which may not correspond to the
low/mid/high bands.

> Also, I'm assuming that the SC4 has

Yes, zero compression is the default (see Julien's notes
below).

> Also, I'm not sure how to route this in stereo. I thought

In this case, Ecasound is hosting the LADSPA effects.
I believe Ecasound gangs the effect if necessary
to obtain the correct number of channels.

> I feel limited here by ASCII art, and also by how to do

Well, you could try installing Nama. Then you get
your mastering network by issuing 'master_on' at
the prompt.

> The GLAME settings make sense to me: all 2-pole filters,

Under Nama, if you want to use GLAME plugins instead of the
default filters, you can just substitute the plugin name or
LADSPA Unique ID into the appropriate configuration file
lines quoted above.

(Incidentally, I'm just getting ready to release a 1.0x
version. I've just today uploaded version 1.056 to CPAN,
but it has yet to show up. 1.055 is broken.)

> How would these LADSPA filters compare to, for example,

In my untutored opinion, all conventional mastering tools
will use a somewhat similar network and similar effects.

If you understand how to use the individual effects, I think
there will not be any unfathomable mystery in the aggregate.
The mystery and artistry will be in your own creative
choices.

What I think Jamin does better than the others is that
it allows you to use different mastering parameters (scenes)
for different parts of the song.

Ron Parker is a respected engineer who not only approves of
Jamin but also wrote the mastering with Jamin tutorial.

http://jamin.sourceforge.net/en/tutorial.html

You say you hear some artifacts. Did you ever approach
the author?

> I'm really starting to wish I'd used postfish

Is Postfish current? It's not on the Linux Sound and MIDI
Applications page, and the last journal entry for postfish
I see is 2004:

http://xiphmont.livejournal.com/595.html

# Julien Claassen's Notes on Mastering effect defaults
#
# Eq: All sections are initially off. You can turn them
# on as needed, one at a time.
#
# Bandpass: Default settings are courtesy of Fons
# Adriaensen, who says they will be within 1.5dB of
# flat settings.
#
# Compressor is turned off, with reasonable default values
# set.
#
# Spatialiser and limiter: both initially off so you can start out
# clean and slowly work your way from there.

best,

Joel

> -ken

--
Joel Roth
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Messages in current thread:
[LAU] [Sort of OT] Ringing in filters, Mark Knecht, (Tue May 11, 9:43 pm)
Re: [LAU] [Sort of OT] Ringing in filters, Fons Adriaensen, (Tue May 11, 10:11 pm)
Re: [LAU] [Sort of OT] Ringing in filters, Mark Knecht, (Tue May 11, 10:36 pm)
Re: [LAU] [Sort of OT] Ringing in filters, Erik de Castro Lopo, (Tue May 11, 11:35 pm)
Re: [LAU] [Sort of OT] Ringing in filters, Fons Adriaensen, (Tue May 11, 11:19 pm)
Re: [LAU] [Sort of OT] Ringing in filters, Mark Knecht, (Wed May 12, 1:16 am)
Re: [LAU] [Sort of OT] Ringing in filters, Erik de Castro Lopo, (Wed May 12, 4:55 am)
Re: [LAU] [Sort of OT] Ringing in filters, Ken Restivo, (Wed May 12, 12:41 am)
Re: [LAU] [Sort of OT] Ringing in filters, Fons Adriaensen, (Wed May 12, 9:11 am)
Re: [LAU] [Sort of OT] Ringing in filters, Ken Restivo, (Wed May 12, 6:32 pm)
Re: [LAU] [Sort of OT] Ringing in filters, Fons Adriaensen, (Wed May 12, 7:44 pm)
Re: [LAU] [Sort of OT] Ringing in filters, Ken Restivo, (Thu May 13, 9:01 am)
Re: [LAU] [Sort of OT] Ringing in filters, Ken Restivo, (Thu May 13, 8:44 am)
Re: [LAU] [Sort of OT] Ringing in filters, Joel Roth, (Wed May 12, 8:16 pm)
Re: [LAU] [Sort of OT] Ringing in filters, Ken Restivo, (Thu May 13, 8:00 am)
Re: [LAU] [Sort of OT] Ringing in filters, Joel Roth, (Mon May 17, 9:14 am)
Re: [LAU] [Sort of OT] Ringing in filters, Ken Restivo, (Mon May 17, 9:31 am)
Re: [LAU] [Sort of OT] Ringing in filters, Fons Adriaensen, (Tue May 18, 8:55 pm)
Re: [LAU] [Sort of OT] Ringing in filters, Folderol, (Tue May 18, 9:03 pm)
Re: [LAU] [Sort of OT] Ringing in filters, Patrick Shirkey, (Mon May 17, 9:52 am)
Re: [LAU] [Sort of OT] Ringing in filters, Ken Restivo, (Wed May 12, 8:04 pm)
Re: [LAU] [Sort of OT] Ringing in filters, Jörn Nettingsmeier, (Mon May 17, 9:55 am)
Re: [LAU] [Sort of OT] Ringing in filters, Garry Ogle, (Mon May 17, 8:13 am)
Re: [LAU] [Sort of OT] Ringing in filters, Erik de Castro Lopo, (Tue May 11, 11:46 pm)
Re: [LAU] [Sort of OT] Ringing in filters, Fons Adriaensen, (Wed May 12, 8:52 am)
Re: [LAU] [Sort of OT] Ringing in filters, Mark Knecht, (Wed May 12, 1:00 am)
Re: [LAU] [Sort of OT] Ringing in filters, Chris Cannam, (Wed May 12, 9:09 am)
Re: [LAU] [Sort of OT] Ringing in filters, Chris Cannam, (Thu May 13, 7:47 am)
Re: [LAU] [Sort of OT] Ringing in filters, Mark Knecht, (Wed May 12, 3:05 pm)