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Audio Stuttering with Nebula Reverb - Reverbs

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Audio Stuttering with Nebula Reverb - Reverbs

Postby kungfujeezus » Wed Jul 06, 2011 2:36 am

Hi everyone, I just upgraded from Nebula 3 to Nebula 3 Pro and then updated to 1.3.499g. When I loaded an old song file that had Nebula 3 reverb - and a reverb setting, it caused all audio to stutter very slowly. I reloaded Nebula 3 reverb and the same reverb preset (Demeter spring reverb) and it still stutters and says CPU is around 62.5%. It never did that before I upgraded, played smoothly, please help, I have to mix my songs!
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Re: Audio Stuttering with Nebula Reverb - Reverbs

Postby richie43 » Wed Jul 06, 2011 3:44 am

Go into the MAST page and check your DSPBUFFER settings and RATE CNV. When I upgraded one or both were dramatically lowered and freaked out my CPU. Hopefully Giancarlo or Enriqusilveti will chime in soon.....
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Re: Audio Stuttering with Nebula Reverb - Reverbs

Postby kungfujeezus » Wed Jul 06, 2011 3:50 am

Thanks for the reply, I experimented with higher DSP and CNV settings but I still had stuttering, slow and choppy audio and Reaper reported resources being very high.
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Re: Audio Stuttering with Nebula Reverb - Reverbs

Postby RJHollins » Wed Jul 06, 2011 5:23 am

Remember ... when you change the settings, you have to

1. click the 'SAVE' button, and then
2. RE-LOAD Nebula for the new settings to be activated.
i7-5820k, MSI X99A Plus, 16 GIG Ram, Noctua NH-D14, Win-7 Pro [64-bit], Reaper-64

NVC [Nebula Virtual Controllers]
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Re: Audio Stuttering with Nebula Reverb - Reverbs

Postby kungfujeezus » Wed Jul 06, 2011 5:56 am

RJHollins,

Thank you, I've had Nebula for over a year but I'm still a newb. Your suggestion worked. I set the buffer to 2048 and saved and that seemed to work. Are there any recommended settings though? Or a way to determine them for my system
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Re: Audio Stuttering with Nebula Reverb - Reverbs

Postby RJHollins » Wed Jul 06, 2011 9:15 am

Hey Great !!

The ONLY setting that MIGHT need changing is the
CNV. It may also be called RateCNV [its' something
I change awhile back ...] Anyway ... what RateCNV does
is give Nebula time to samplerate convert the library
to your working sample rate [96k, 44.1k etc].

In NEBULA's main window, you'll see the samplerates
displayed. The First one [left] shows the original
library sample rate. The second [right] shows your
current session samplerate. IF YOU SEE a FLASHING
arrow pointing at these values, then Nebula has NOT
fully converted the library ... thus the RateCNV needs
to be increased. I think mine is a 9000.
The ONLY drawback to raising this value [if you can
call it that], is that the library will take longer
time to load [the files are HUGH] ... BUT this is
necessary in order to have the library perform according
to specs.

Again ... remember ... click save after changing values,
and then, RE-LOAD Nebula for those settings to be active.

Hope that helps!
i7-5820k, MSI X99A Plus, 16 GIG Ram, Noctua NH-D14, Win-7 Pro [64-bit], Reaper-64

NVC [Nebula Virtual Controllers]
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Re: Audio Stuttering with Nebula Reverb - Reverbs

Postby giancarlo » Wed Jul 06, 2011 9:27 am

richie43 wrote:Go into the MAST page and check your DSPBUFFER settings and RATE CNV. When I upgraded one or both were dramatically lowered and freaked out my CPU. Hopefully Giancarlo or Enriqusilveti will chime in soon.....


well, it's possible the value is too low, it was aimed to a better user experience (latency-wise). Maybe we'll work on a different algorithm. At the moment nebula tries to match the current asio buffer. It works pretty well on new i7 computers and for new users.
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Re: Audio Stuttering with Nebula Reverb - Reverbs

Postby steve36 » Wed Jul 06, 2011 9:59 am

If it continues to flash just press reload...I always have to do this (even though my RATE CNV is set to 9000)...I think it has something to do with my 003 rack and it's tendency towards anal retentiveness. :)

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Re: Audio Stuttering with Nebula Reverb - Reverbs

Postby richie43 » Wed Jul 06, 2011 4:49 pm

giancarlo wrote:
richie43 wrote:Go into the MAST page and check your DSPBUFFER settings and RATE CNV. When I upgraded one or both were dramatically lowered and freaked out my CPU. Hopefully Giancarlo or Enriqusilveti will chime in soon.....


well, it's possible the value is too low, it was aimed to a better user experience (latency-wise). Maybe we'll work on a different algorithm. At the moment nebula tries to match the current asio buffer. It works pretty well on new i7 computers and for new users.



I think that the DSPBUFFER default may be a bit low for some of us unlucky ones that don't yet have an i7. I have a quad-core, but it's not the monster of an i7, so upping this setting has helped quite a bit. Just a tip for others with less-than-nuclear computers!
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Re: Audio Stuttering with Nebula Reverb - Reverbs

Postby richie43 » Wed Jul 06, 2011 5:30 pm

RJHollins wrote:Hey Great !!

The ONLY setting that MIGHT need changing is the
CNV. It may also be called RateCNV [its' something
I change awhile back ...]


Not true. DSPBUFFER settings drastically affect CPU loads. As Giancarlo stated, the default on the newer version of Nebula seems to be ideal for a super computer, like an i7. So any CPU less than that can benefit greatly by increasing your DSPBUFFER settings. My Q8400 quad core does pretty well at 2048 or sometimes 4096. For some reason my performance actually starts to decrease again if I go all the way up to 8192.
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