B5 V2 CPU Spikes, pops & clicks
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- KVRAF
- 23102 posts since 7 Jan, 2009 from Croatia
Wait, note dropouts happen with Reaper's virtual keyboard live, but not during transport playback... OK this might be a GUI thread related thing...
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- KVRian
- 941 posts since 5 May, 2008 from France
Ok good, you got me worried for a moment 
Because this would have been a UVI problem... We don't really handle the CPU usage on the GUI stuff unless they have a heavy function tied to them and it's not the case for most knobs.
Because this would have been a UVI problem... We don't really handle the CPU usage on the GUI stuff unless they have a heavy function tied to them and it's not the case for most knobs.
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- KVRist
- 137 posts since 24 Nov, 2011
Yes, I did: 128 samples.thysm00 wrote: You did not tell me anything about the buffer size though.
BTW, I really love E-PIAN
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- Banned
- 118 posts since 9 Mar, 2018
so what system exactly is needed to run B-5 V2 smoothly whatever it is you're gonna play and regardless of a tempo?
In standalone mode and Reaper.
And how B-5 CPU load varies between these two?
I wanted to get it, but all these reports of spikes and clicks are not very encouraging.
In standalone mode and Reaper.
And how B-5 CPU load varies between these two?
I wanted to get it, but all these reports of spikes and clicks are not very encouraging.
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- KVRer
- 17 posts since 9 Feb, 2020
The GUI issue seems to be a separate issue. That's also happening with UVI WS' arpeggio UI and seems not directly related to B5.
However, it seems that MIDI events (note ONs?) produce CPU spikes:
https://drive.google.com/file/d/1NWyq-B ... sp=sharing
In that demonstration one can see that the "pops" and "clicks" always happen around the same MIDI file positions. I have disabled the plugin UI but left focus on the plugin so you can see that CPU usage on average is around 5%. It's a 4 core (no HT) machine with single core boost. That means B5 is producing those artifacts despite the CPU working at less then 20% utilization.
As already pointed out by the dev, it seems (is) related to the many voices. Is there any way to avoid these spikes? Maybe there is memory managment going on in the background (Windows 10) because voice instances get freed and allocated? Are those voices pre-allocated? For sample processing I suggest to avoid everything possible that's related to changing plugin infrastructure like memory managment or acquiring external resources and the such. C++ can be quite nasty in that respect, and I suggest to only use it for laying out the general and largely fixed program structure. Creating or destroying class instances during regular time-critical processing should be avoided at all cost. Just my 2 cents. I don't know how advanced the dev knowledge is behind B5, so feel free to ignore me if I'm overstepping my boundaries here.
However, it seems that MIDI events (note ONs?) produce CPU spikes:
https://drive.google.com/file/d/1NWyq-B ... sp=sharing
In that demonstration one can see that the "pops" and "clicks" always happen around the same MIDI file positions. I have disabled the plugin UI but left focus on the plugin so you can see that CPU usage on average is around 5%. It's a 4 core (no HT) machine with single core boost. That means B5 is producing those artifacts despite the CPU working at less then 20% utilization.
As already pointed out by the dev, it seems (is) related to the many voices. Is there any way to avoid these spikes? Maybe there is memory managment going on in the background (Windows 10) because voice instances get freed and allocated? Are those voices pre-allocated? For sample processing I suggest to avoid everything possible that's related to changing plugin infrastructure like memory managment or acquiring external resources and the such. C++ can be quite nasty in that respect, and I suggest to only use it for laying out the general and largely fixed program structure. Creating or destroying class instances during regular time-critical processing should be avoided at all cost. Just my 2 cents. I don't know how advanced the dev knowledge is behind B5, so feel free to ignore me if I'm overstepping my boundaries here.
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- KVRian
- 941 posts since 5 May, 2008 from France
On another thread, i realized that you might be using reaper if you are getting those glitches, so try to check evildragon's advice in his last answer here:
viewtopic.php?t=503839
viewtopic.php?t=503839
