Render of an audio montage with two very, VERY large audio files --> corrupt result

Rendering an audio montage with two very, VERY large audio files results in the first part not rendered but filled with zeros.

I’m using WaveLab 9 64-bit. It would be interesting to know if this is also the case with the currently supported WaveLab versions.

Setting:

Two very large Audio-files shall be mixed (18h, 32float, 22GB).

When I start the render-process, the first part in the progress bar is filled surprisingly quickly, then the calculation seems to kick in.

The result is as follows: zero-values for almost 5 hours, and then the desired audio mix appears.

I was able to mix this with SoundForge Pro 17 and Nuendo 13. My impression is that WaveLab 9 64bit was faster, but with this error.

When saving in SoundForge Pro 17, I get a message stating that the RF64 wave format is required, not the standard wave file format. After saving, the file size doubled. ( 46GB vs 22GB )

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Running a “quick” test render in WaveLab Pro 12.0.50 with a rather huge montage (6 tracks, 4 of them with 8 lanes each; no clip effects, just 1 track effect for continuous noise generation + 1 output plug-in for limiting) I do not get any errors. At least on a quick look the waveform looks good without any silence. Result WAV file is about 26h:27min and 34GiB (2ch, 48kHz, 32f).

If I see correctly you have 1 plug-in per track in your montage. Did you try to render without the plug-ins?

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Maybe double check that Support RF64 File Format is checked in preferences

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Thank you for responding. Yes, I had done the same test without any plugins later.

The suggested 64-bit check was also set.

I have tested now three times … always the same error.

I also used WaveLab 9.5 elements. The same incorrect result.

Would be interesting if Wavelab 10 and 11 has it too.

WaveLab 12 seems to have got an internal overhaul. Is it?

How to generate this test file:

Get the audio files from the complete Bach recordings. (James Kibbie - Bach Organ Works - Download) Open / Create a Stereo 44.1kHz audio montage. Drag all the files into it at once.

To create the markers for a later cut … go to CD and use the CD wizard. I had chosen a 1 second pause value, press OK. The CD markers are now created.

Render all this as one large file.

Make a copy. Rename it.

Make a now montage. Drag those two files in it but now the files shall be aligned not sequential but parallel.

“Render” it. … look in the result. …

I did it (WaveLab 12 Pro) and see no problem (except that there is clipping at the final stage, since two equal wav are mixed together).

To make sure I did it the same way as you, that means a montage with 329 titles that lasts more than 18 hours (I inserted the complete set of files).

Ah, I guess I did not fully grasp your error description, as before I just rendered a huge montage made out of a lot smaller clips (basically the first rendering step of your how-to list).
So out of curiosity I grabbed the old WaveLab Pro 9.5 installer, the files you linked and set up everything according to your instructions - first import all files (330) into a linear montage and render to one big 18h+ file (WAV, 32f, 44100Hz), then make a copy of that result file, then create a new montage with both long files on 2 different tracks and render again (WAV, 32f, 44100Hz). Oh dear, my poor drives!


Set up montage with the long rendered file and its copy on 2 tracks, here in WaveLab Pro 9.5.50


Result of the 2-track render in WaveLab Pro 9.5.50.

Yes, that pretty much matches with your error description.


Result of the 2-track render in WaveLab Pro 10.0.70.

Ooops, same error, exactly to the sample.


Result of the 2-track render in WaveLab Pro 11.2.00.


Result of the 2-track render in WaveLab Pro 12.0.50.

Results from WaveLab 11 and 12 are looking fine, although render time seemed considerably higher (about 45 minutes).
The two long source files were stored side-by-side on a regular HDD, rendered files were created on a faster SSD.