Migrating from NUO-STEMS 3 to NUO-STEMS 4
Can I convert my existing .stem.m4a files (created in NUO-STEMS 3) to NUO-STEMS 4 native stems?​
No. Because NUO-STEMS 4 now has a different decoding mechanism. This results in a different track length than NUO-STEMS 3 (which relied on additional silence added at the beginning of the track and offset from the original track)
NUO-STEMS 4 now has exactly the same track length as the original track.
So what does this mean for our NUO-STEMS 3 stems? Does NS4 automatically replace them or do we have to reanalyse the library and manually discard the old ones?​
NUO-STEMS 4 doesn't work with NUO-STEMS 3 stems (as described in the previous section). You can either:
- generate new linked native stems in NUO-STEMS 4 for your originals and therefore get rid of NUO-STEMS 3 stems.
- or generate new NUO-STEMS 4 .stem.m4a files and replace existing .stem.m4a files in-place and use them as standalone files.
Traktor Pro 3 compatibility​
.stem.m4a files created in NUO-STEMS 4 are not compatible with Traktor Pro 3.
When trying to load .stem.m4a files created in NUO-STEMS 4 in Traktor Pro 3, you will see an error:
Can not read stem metadata for file: FILE.stem.m4a. Detail: version: 2 is not supported.
This is a deliberate decision for NUO-STEMS 4 to not support Traktor Pro 3 - I want you to support Traktor team by upgrading to Traktor Pro 4. I strongly believe that 50$ (as of Black Friday deals) is a great value for what you're getting - it's an investment into future of Traktor.
Traktor Pro 3 was released October 18, 2018. Which is more than 7 years ago.
If you need to use .stem.m4a in Traktor Pro 3, you can continue to use NUO-STEMS 3 with Traktor Pro 3.
You can read more about this in Legacy / Export Mode section.