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08-01-2019, 04:47 PM
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#1
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Human being with feelings
Join Date: Feb 2019
Posts: 7
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Artifacts only when rendering full song
After rendering a song, I noticed a "fluttering" artifact at one point in the song that is not present when playing it back in Reaper. Oddly enough, after some troubleshooting I noticed that the artifact is not there if I only render that particular part of the song in isolation, as opposed to the entire song.
So far I have tried the following, without success:
- Turn off the limiter on the master bus
- Render at 1x speed as opposed to full speed
- Change the buffer size to maximum in the "ASIO GuitarPort" driver
- Switch the ASIO driver from "ASIO GuitarPort" to "ASIO UX1"
- Render as FLAC as opposed to WAV
The only VST plugin I'm using is Pod Farm 2.
Thanks in advance for any help. I wasn't sure what more information would be relevant to include here, so please feel free to ask :-)
Last edited by linusk; 08-01-2019 at 04:49 PM.
Reason: Add more information
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08-01-2019, 05:06 PM
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#2
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Human being with feelings
Join Date: Oct 2010
Location: Charleston, SC
Posts: 12,792
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find the track that is wonky and freeze it. Then do your render
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08-01-2019, 09:37 PM
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#3
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Human being with feelings
Join Date: Jun 2013
Location: Krefeld, Germany
Posts: 14,781
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Could you explain why this should be able to help ?
(Of course he should not set render speed to realtime !!!! And with that buffer size and any ASIO setting should not matter.)
-Michael
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08-02-2019, 04:53 AM
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#4
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Human being with feelings
Join Date: Oct 2010
Location: Charleston, SC
Posts: 12,792
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I have found that with some really intense plugins that if I try to render them all at once or even freeze all the tracks at once that I can get glitches.
So when I get a track that's glitching, which just happened to me the other day, then I just freeze that track all by itself so all the resources to freezing it into an audio file are used.
Then I play the Frozen track back and make sure that it is glitch free. Then when you render it is just an audio track which is effortless for Reaper to render. I'm running a buffer of 128 also so another option might be to increase my buffer when rendering. I don't know that that matters though during render. Anyone know?
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08-02-2019, 06:39 AM
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#5
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Human being with feelings
Join Date: May 2009
Posts: 29,269
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Quote:
Originally Posted by Coachz
I'm running a buffer of 128 also so another option might be to increase my buffer when rendering. I don't know that that matters though during render. Anyone know?
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I'm guessing not, if an offline render, since not even the audio driver is required to render.
__________________
Music is what feelings sound like.
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08-02-2019, 06:44 AM
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#6
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Human being with feelings
Join Date: Feb 2019
Posts: 7
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Thanks for the tip. I didn't know about freezing tracks. Doing that appears to help, although I'm not sure it completely eliminates the artifacts (the effects are subtle, and by now I've listened to the section so many times I'm starting to lose my objectivity :-) ).
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08-02-2019, 08:38 AM
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#7
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Human being with feelings
Join Date: Jun 2013
Location: Krefeld, Germany
Posts: 14,781
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Quote:
Originally Posted by Coachz
I have found that with some really intense plugins that if I try to render them all at once or even freeze all the tracks at once that I can get glitches.
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Non-realtime (offline) rendering can't generate glitches, unless there is some serous bug somewhere. Any new sample can take all time it needs for calculating.
-Michael
Last edited by mschnell; 08-02-2019 at 08:50 AM.
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08-02-2019, 11:24 AM
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#8
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Human being with feelings
Join Date: Oct 2010
Location: Charleston, SC
Posts: 12,792
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Quote:
Originally Posted by linusk
Thanks for the tip. I didn't know about freezing tracks. Doing that appears to help, although I'm not sure it completely eliminates the artifacts (the effects are subtle, and by now I've listened to the section so many times I'm starting to lose my objectivity :-) ).
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are you able to freeze the track and play it back without any artifacts? If not also check your plug in settings. Many plugins have settings like number of voices, polyphony, buffer size, memory. I have 12 gigs of RAM so I usually push voices up to 128 and memory up to one or two megabytes
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08-04-2019, 03:43 PM
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#9
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Human being with feelings
Join Date: Feb 2019
Posts: 7
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Quote:
Originally Posted by Coachz
are you able to freeze the track and play it back without any artifacts? If not also check your plug in settings. Many plugins have settings like number of voices, polyphony, buffer size, memory. I have 12 gigs of RAM so I usually push voices up to 128 and memory up to one or two megabytes
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Yes, after freezing the track it plays back without artifacts. The track in question is the one using Pod Farm 2, so maybe there is some issue with that plugin when rendering the whole song. I will look into it.
Thanks a lot for the help!
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