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buzz forums • View topic - SubTick Timing Bug (or PXP)

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PostPosted: Fri Jan 20, 2017 2:11 am 
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Joined: Mon Nov 21, 2011 9:42 pm
Posts: 697
this one seems connected to samplerate, so at 88.2khz, with 144bpm, 12 tpb and 96 rpb, all odd rows in pxp don't trigger ANY parameter changes/notes:
confirmed by 2 other people. different samplerates give different results, at 44.1 it seems that only every 4th row works etc.
i noticed this while working on my own machine, but all machines are affected so its either something in pxp or subtick timing in general.


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PostPosted: Fri Jan 20, 2017 9:20 am 
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Is that original PXP, Chahur's mod or both?


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PostPosted: Fri Jan 20, 2017 10:18 am 
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PostPosted: Fri Jan 20, 2017 8:23 pm 
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Could you perhaps try to duplicate it using pattern editors than PXP? If you can then it's a Buzz bug, if not then probably PXP itself.

My audio won't do 88.2k. If you can give me settings to replicate at 48k or 96k I'll see if I can get it to happen here.


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PostPosted: Fri Jan 20, 2017 8:31 pm 
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PostPosted: Sat Jan 21, 2017 10:18 am 
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Yeah, happening here too. I've got a ton of real life to do this week but if nobody's fixed it by the time I'm done I'll see if I can help. I suspect you're probably on the right track with the hard coded numbers though.


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PostPosted: Mon Jan 23, 2017 8:17 pm 
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I can reproduce the problem also with patternXPmod.
I'll try to have a look ... but not in the next 10 minutes :-)


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PostPosted: Sun Feb 12, 2017 10:23 pm 
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found an even stranger variant of this bug: when a machine is muted, even more rows stop to work! (ProcessMutedMachines has to be TRUE).
10 rpb, 4 tpb, 117 bpm is enough to make this bug appear, row 0 works, row 1 doesn't.
my guess is that when the machine is muted, subtick timing is completely ignored...


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PostPosted: Sun Mar 12, 2017 7:37 pm 
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I am pretty sure that the problem is not in PatternXP.
After some heavy debugging, I couldn't spot any part of the code involved in playing.
My guess is that it's done in the core of buzz.


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