On 31.03.2021 17:37, Will Godfrey wrote:
On Tue, 30 Mar 2021 16:44:15 -0500
"Art Horan" <dmarc-noreply@xxxxxxxxxxxxx> (Redacted sender "art.horan" for
DMARC) wrote:
On 3/30/21 4:14 PM, Kristian Amlie wrote:
On 30.03.2021 23:03, Art Horan (Redacted sender art.horan for DMARC) wrote:I'll look for problems then and report if I notice any. I also sometimes
On 3/30/21 2:38 PM, Will Godfrey wrote:It's heavily host dependent. And the problem is exactly that I don't
On Tue, 30 Mar 2021 21:02:51 +0200I haven't noticed a problem with envelopes using the lv2 in Qtractor or
Kristian Amlie <kristian@xxxxxxxxxx> wrote:
Can anyone on this list reproduce the problem where Envelopes sometimesI have a couple of Ardour tracks that show this up.
have wrong timings when used under LV2?
I may have a potential fix for it, but I'm not able to verify that it
solves the problem.
Reaper.
What should I be looking for? Is it subtle or obvious? What versions?
know which hosts trigger it and under what circumstances. I have
certainly seen the problem myself, but it's inconsistent, and now that I
needed to test it, of course the host was acting nicely.
I know exactly what the underlying reason is: It's because some hosts
will sometimes pass in shorter block sizes than the full block size.
This is allowed by the LV2 spec, and even expected in some cases.
However, it's hard to tell exactly when hosts will do it.
use Carla as an lv2 host too, but I never took to Ardour.
I have a test MIDI file that shows this up to the extreme. Kristian's patch
fixes most of it but there is still some funky stuff going on :(
It's very much dependent on buffer size. Less that 256 frames, and there is no
noticeable problem. By the time to get to 1024 frames it's really bad. But
that
has to be be *both* Yoshimi's internal buffer size and the Jack buffer size.
I've attached the file here if you want to give it a try.
It makes bank and program changes so you have to do the following for it to
match:
Disable bank root change.
In the current bank Will_Godfrey_Collection must be bank 105
and Will_Godfrey_Companion must be bank 110
Carla definitely uses variable buffer sizes a lot, so I expect it would show
up
on that too.