[5154] scrubbing while operator is sustaining > crash

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naph
Posts: 257
Joined: Fri Nov 30, 2007 4:38 pm

[5154] scrubbing while operator is sustaining > crash

Post by naph » Fri Mar 13, 2009 1:44 pm

it took me almost an hour to isolate this problem. i actually have gone channel by channel disabling stuff.. and at the end i found the bastard channel

the attached project has only one operator, playing sustained single note with one oscillator's envelope looped: i have crashes if scrubbing on arranger every time the note is sustained
the same with other type of loop envelope, not just beats.

http://www.beatbank.it/tmp/bugs/scrubbing.zip

the file also contains some bug snapshots created after the crashes.

i tried reproducing this by making a new operator patch, but i wasn't able to. so i stopped (really need to have some things done now :))

hope this helps in some way
cheers

naph
Posts: 257
Joined: Fri Nov 30, 2007 4:38 pm

Re: [5154] scrubbing while operator is sustaining > crash

Post by naph » Fri Mar 13, 2009 2:42 pm

ok.. i was back working on the tracks and trying to make an identical patch from scratch.. guess what. it still crashes :) i found out that spread is

i found out a way to make a new patch crash:

drop an operator (default patch is ok)
change osc A loop to beat
rise spread (this is essential)
play a midi clip with a sustained note
crash

now i think it's enough :)

naph
Posts: 257
Joined: Fri Nov 30, 2007 4:38 pm

Re: [5154] scrubbing while operator is sustaining > crash

Post by naph » Fri Mar 13, 2009 3:24 pm

so bad.. spread is not the only parameter to make operator crash

here's another preset i had in the same project which causes the same behaviour, even if spread is set to 0

http://www.beatbank.it/tmp/bugs/crashing.adv

hope this helps even more :)

Amaury
Posts: 5885
Joined: Mon Mar 20, 2006 6:59 pm
Location: Ableton Headquarters
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Re: [5154] scrubbing while operator is sustaining > crash

Post by Amaury » Fri Mar 13, 2009 4:13 pm

Hi,

The bug has been "identified", so, don't bother searching for more. Thanks a lot for your investigation!

Regards,
Amaury
Ableton Product Team

naph
Posts: 257
Joined: Fri Nov 30, 2007 4:38 pm

Re: [5154] scrubbing while operator is sustaining > crash

Post by naph » Tue Mar 17, 2009 7:16 pm

fixed with beta20

the same project giving me headaches is working since 1 hour with no crashes
thanks guys for the quick fix !

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