Hi,
seablade
March 20, 2021, 4:41pm
#2
Well personally I wouldn’t recommend CALF plugins.
What have you tried, how have you determined Ardour does not see the plugin? Is there any output on the log?
Seablade
Hi,
Why don’t you recomend Calf plugins? I used to think they are very well tools(?)
x42
March 20, 2021, 4:56pm
#4
Have you restarted Ardour after installing them? Ardour detects LV2 plugins at application start.
Also run lv2ls in a terminal. That lists IDs of all installed LV2 plugins. That may help to track things down.
Because not only are they are unreliable, but they cause various audible artifacts: zipper-noise, phasing issue, clipping. Furthermore the GUI shows things that do not match what happens.
They may still be useful in certain cases, just be aware of the issues.
Ever increasing list of references to backup those claims:
opened 09:26PM - 10 Feb 19 UTC
I was measuring the frequency response of your crossover filters and is not flat. I looked to this issue:
#98
I don't really...
Calf’s cross-over (and calf-multiband compressor) do introduce phasing issues. In fact Calf makes the same mistake as the OP, using default EQ as cross-over filters. This results in notching out frequencies and introduces phase shifts.
What’s worse, is the Calf-GUI does not show this and makes you believe that it’s flat and looks fine.
It’s easily measured however using a spectrum analyzer[1], or in case of calf multiband compressor using Ardour’s built-in plugin transient analysis [2].
If y…
Interesting, I’m not a fan of the calf compressor’s sound but am usually driven away by the substandard DSP (e.g. zipper artifacts or worse when automating the effects, phasing artifacts of the cross-over filters etc, some occasional NaNs or occasional huge noise of the reverb), while the latter are easily measurable, the overall result is, of course, subjective and may result in the sound that you want.
In many cases the controls also don’t do what I expect from them, but that’s just an aside. …
I highly recommend to use an EQ other than calf, especially if you need to automate it. Calf’s EQ is not de-zippered and automating it introduces artifacts.
e.g. you can see the signal level jump at block-size increments:
[image]
Try EQ10Q or x42-eq or perhaps a-eq (comes with ardour). Does it have to be a shelf for the 36Hz cut? Perhaps a high-pass is more appropriate.
calf plugins are notoriously unreliable and responsible for the most crash reports that we receive for Ardour on GNU/Linux. And apart from that the DSP of most calf effects is usually substandard.
It seems that calf limiter uses a FIFO for a lookahead buffer and uses the stack for this.
I don’t even know where to begin explaining how wrong it is.
If this is used to calculate the gain factor, it’ll accumulate drift. That’s something you definitely don’t want in a limiter. Also using the stac…
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x42:
Because not only are they are unreliable, but they cause various audible artifacts: zipper-noise, phasing issue, clipping. Furthermore the GUI shows things that do not match what happens.
They may still be useful in certain cases, just be aware of the issues.
Oh, ok. Nice to know. But is there any good alternative in LV2 format?
x42
March 20, 2021, 5:13pm
#6
Ardour comes with one. ACE-Fluidsynth
That’s too generic to provide suggestions.
For free-software (EQ, compressor, limiter, convolver/reverb) have a look at e.g.
Those are packaged on most GNU/Linux distros, too. If you don’t mind commercial/proprietary software: https://overtonedsp.co.uk/ offers Linux versions, Mixbus Plugins - Music Recording Software for Audio Post Production - Harrison Audio Consoles offers also LV2 and there are more…
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aspiers
March 21, 2021, 8:19pm
#7
I think this should be documented in the “Getting More Plugins” section of the manual . I will submit a PR if someone confirms that PRs to GitHub - Ardour/manual: Mirror of the Ardour manual will be reviewed.
system
June 21, 2021, 2:20am
#8
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