Lem for all concepts and devs
Florck for DevOps help and infrastructure
Fhyren (SAF and SSD), C. (SAF)
W. (SSD)
This website source code is under AGPL-3 license
As for Wikipedia content, the common knowledge (music metadata) must be under a strong open licence: CC-BY-SA 3.0 Unported.
All elements related with artist production (lyrics, melody, images, trademarks) remains obviously under their original license.
The explorer should be able to do whatever wanted when adding personal insight.
Therefore the license for the content should be their choice.
SSD code (common code base, SH/WX implementations) is Open Source (MIT Licence) by choice.
SSD Qt implementation had to be Open Source since free Qt use is restricted to opensource projects.
Python 3, Django