Well Mr dr, Robin had in a past post precised your ‘honest’ appreciation newly expressed here. I quote next the answer then put forward, so those reading this thread, also have accurate info:
//As its easy to appreciate, by the explanation and its actual use; Spectralayers 7 unmix function is not Spleeter. To be based on is very different to your emphasis stated above. *1
This is ‘the other post’ with further info about the Unmix feature that Robin mentioned in that quotation:
From this interesting thread:
*1(Edited out further qualifiers here, for the congeniality of this forum).