[Ardour-Users] A4.4: Critical bug using calf's lv2

Paul Davis paul at linuxaudiosystems.com
Tue Oct 27 08:03:43 PDT 2015

CALF plugins have always been deeply problematic. We are increasingly close
to official recommending that people not use them.

On Tue, Oct 27, 2015 at 10:52 AM, Damien Delpiroux <xzurukneg at free.fr>

> Hi all.
> I use kxstudio12.04 with calf's LV2 for many  years, with ardour 2,3
> (+/- git), 4, and made my workflow with.
> I've worked with this setup using ardour3-git (so it was ardour4 in
> fact) for hours without problem.
> But now I can't continue like this because I got critical bugs when I
> use calf's LV2 (gate and  compressor for sure).
> Generally, ardour4.4 is slower and not reactive as I (well) know since I
> use plug-in (latency to open plugin-UI, to play after moving play head,
> when reach end of loop).
> The bug is really critical because: my system freeze!
> That begin by very big latency between sound and played position showed
> in editor (the play head don't go back to the begin of the loop when the
> sound does), and go badder to critical bug.
> The first time, the system freeze, not tty (!), alt-gr+kill+imp  (kill x
> server) don't work, and after15min I finally get the login window (same
> as when you boot), and still not tty!
> After that, I see something strange in another terminal (for a music
> player) about "gstreamer pluging scan errors".
> After reboot (and update), I've reproduce the bug, also with bigger
> buffer value in jack. Simply loop region and pay with calf's gate or
> compressor.
> I've don't understand the "gnu compiler 5 thing", but I've try also with
> Sunday nightly build, with same result.
> I'll try to make a backtrace.
> Best,
> --
> Damien.DX
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