younglove
Posts: 314
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 Posted - Mon Feb 12, 2001 12:54 pm
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First, I'm running DirectX 6.1a, if it makes
a difference.
Freefilter requires "learning" a source profile and a destination profile by previewing each. The problem I had trying to run the Steinberg Freefilter demo is that
the Cool Edit transport controls (play, selecting a file or selection to play) are locked while the plugin is up, and any profile learned is not retained when the Freefilter is closed in order to select the other profile.
So, what you have to do is prepare a file with three sections in it, separated with silence, and delineated with cue ranges.
The first (beginning of the file) is the source profile wave selection to be learned
(the one that you want to match EQ *TO* compared to the destination profile; the the "control" file).
The second is the destination profile wave selection to be learned (the one whose EQ
represents the pre-processed file compared to the source profile; the "process" file).
If the file you actually want to process and change is neither the source nor destination files, then append a third file. Depending on your application, the second and third sections may be the same, so you'll only have two sections instead of three. The sections should be separated by a couple of seconds of digital silence.
Now, with that file opened and focussed, bring up the Freefilter Demo, press "Source"
(the "Learn" button will light as well) in the plugin. Now press "Preview". The source profile will start playing. Be ready for when the source profile ends (the silence between sections begins). When the silence between sections begins, press the "Dest." button. The Freefilter will now start "learning" the next section being previewed. When the destination section of the wave finishes playing, press the "Stop" button in the plugin. Now press the "Match" button. Now press "OK" and Freefilter will start processing the entire file, including the beginning profile section(s). After processing, trim to the cue range section (two or three) to keep only the part you wanted changed, discarding the rest.
All the restrictions of the demo version still apply: 44100 only (32-bit), mono only, restricted graphic EQ sliders, no presets, morphing?, and signal interruptions with dropouts. On evaluating the Freefilter, it is worth noting that the dropouts affect the learned profile as well as the processed output (you can see this clearly by "learning" a frequency sweep profile), so for certain material, the demo version will not behave as precisely as the full version would.
Of the many interesting applications of this type of tool, one could learn
pink noise generated by Cool Edit as source, learn a pink noise
recording from a test record as destination, then transform to flatten out the EQ biases of your vinyl setup for a given recording.
This type of tool is very useful and I would encourage Syntrillium to provide this functionality in a future release. I would be happy to pay for it, but not $140-200 as for the Steinberg Freefilter.
Edited by - younglove on 02/12/2001 1:10:36 PM
Edited by - younglove on 02/12/2001 2:04:22 PM
Edited by - younglove on 02/12/2001 3:31:46 PM
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Freefilter Demo use in Cool Edit: Workaround
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