BR: Distorted audio export (Error with submix -> bus routing)

[UnionS8]

Hello,
I'm working on pretty large project. I have realized, after countless hours, the export gets distorted. Playing back the song is OK. It appears on exported track only. The other projects render fine. Few edits prior the last one, everything is fine too. The distortion sounds like a small audio buffer. But as I said, playing of the song is OK. Also why would the buffer size had anything to do with export? I also tried to increase the ASIO buffer. Nothing happened. I'm on Windows, Waveform 11 Pro. I don't know how to report the bug better, because the project has 46 tracks allready, full of VSTi's so posting it somewhere is a nonsense. Please HELP!
EDIT FOR DEVS:
I have figured out what's causing the strange artifacts:
The issue decribed here and in the thread bellow occures under one special condition. When I have some tracks within a submix routed to a dedicated bus and then Master bus like this:
(bass1 + bass2) -> Bass submix -> Bass bus -> Master bus
There are also bass3 and bass4 tracks in the mix. They go like this:
Bass3, bass4 -> Bass bus -> Master bus. They are not a part of the Bass Submix. They render OK.
Conclusion is: When I use a submix prior to a Bus and Master bus, I get the distortion exposed in the SounCloud link below. This I can understand. BUT, what I don't get is, why it didn't occure in previous exports with the same technique. I spotted the strange behaviour in beta 36. But I bet, the previous versions were exported from 36 too. Also I tried upgrade to Beta 37 and downgrade to Beta 32 and distortion is still present. I don't know if I get a pure 32 by just re-installing the 37 and 36. I can't completely remove and install again the whole Waveform right now.

[UnionS8]

Here's a short example:
https://soundcloud.com/de_mode_music/ba ... rt-example
What's also weird, it doesn't affect the Orch hit. Only some bass and drums are affested. These, which are sent to their corresponding sub-mixes and then even mix buses.
(bass1 + bass2) -> Bass submix -> Bass buss -> Master bus
(various drums) -> Drums submix -> Drums buss -> Master bus

[UnionS8]

One more thing: right now I tried to export the previous edits (which rendered fine before) and they get distorted too. Another projects are OK. But the same project, which was fine last week, now renders with the artifacts shown in the post above...

[JohnNoizz]

Looks like a plugin making conflict with your track and the DAW, try disabling some of them and them render the track

[UnionS8]

But I tried to render an old edit which was fine back then an it's corrupted too. I have returned to the state everything was fine (without new plugins) and the distortion is present in the new export.

[Peter Widdicombe]

Somewhere along the line, something got added or pushed up in the mix ? If you look at all of your meters, you don't see any of them momentarily exceeding the old-fashioned 0-Vu level? Unlike the old tape/mixing days, you DON'T want to push the mix into the "occasionally orange or red" level.

Do you have the "use peak mode" set, and notice any of the peak line into orange/red territory?

What is also odd - you don't hear that at all if monitoring from the main output? Is there a LoudMax or equivalent plug-in being used, but not taking into accounts all channels, or side-chaining in an "unusual" way?

[UnionS8]

But as I wrote earlier – the playback is all right. The distortion (or maybe micro dropuots) ocure only on exported audio. No matter which rate, bit depth, format, and so on. And also on exported audio made from an older edit, which I have EXPORTED and saved in a good condition the last week.

[Peter Widdicombe]

- did you try rendering at 1X play speed? (Some VST's require this)
- what data rates (44k?) selected
- what quality was selected?

[UnionS8]

Everything. 1× play speed, mp3, wav, 44k, 48k, normalized or not. Anything you can imagine. Right now, I can't continue the investigation, I'm not at home. I'll get to the computer maybe later, maybe tomorrow...

[Rock]

MRecorder

[UnionS8]

I have edited the first post with my findings...

[UnionS8]

MRecorder

Thank you Yes, MRecorder works fine. But it's not a proper solution, only workaround You know, what I mean

[astey]

Seems like you experiencing something similar reported in this thread:
viewtopic.php?f=22&t=545391

Submixes work differently in Tracktion, nothing like you know from other daws.
Feel free to comment.

Tipp: Use folders.
And submixes for nothing but basic acoustic drum recordings on the top layer.
Be aware of: a folder turns into a submix if you insert a plugin on that track/lane.

[UnionS8]

Seems like you experiencing something similar reported in this thread:
viewtopic.php?f=22&t=545391

Submixes work differently in tracktion, nothing like other daws.
Feel free to comment
Tipp: Use folders.
and submixes for nothing but acoustic drum recordings on the top layer.
Be aware of: a folder turns into a submix if you insert a plugin on that track/lane.

Not exactly, but maybe these two issues are releated. For now I changed the submix for another bus. so now it's (bass1 + bass2) -> Bass 1+2 bus -> Bass bus -> Master bus.
Folder track doesn't solve anything, since I have a set of plugins on the Bass 1+2 bus. I just need to treat Bass 1 and 2 with a special set which I don't need on Bass 3 and 4. But I need all bass lines also effected together, hence the second bass bus. (I know... But hey, that's why I love Waveform too – for it's almost endless routing capabilities.)

[fde101]

The fact that there is a method of trying to change the output of a track within a submix to route it somewhere else is likely a bug. That routing does not work as people expect it to and has led to unexpected output.

Short version: don't do that.